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Journal articles on the topic 'Photometric study'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Sun, Mingxu, Bingqiu Chen, Helong Guo, He Zhao, Ming Yang, and Wenyuan Cui. "SPar: Estimating Stellar Parameters from Multiband Photometries with Empirical Stellar Libraries." Astronomical Journal 166, no. 3 (2023): 126. http://dx.doi.org/10.3847/1538-3881/ace5ab.

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Abstract Modern large-scale photometric surveys have provided us with multiband photometries of billions of stars. Determining the stellar atmospheric parameters, such as the effective temperature (T eff) and metallicities ([Fe/H]), absolute magnitudes (M G ), distances (d), and reddening values (E(G BP − G RP)) is fundamental to study the stellar populations, structure, kinematics, and chemistry of the Galaxy. This work constructed an empirical stellar library that maps the stellar parameters to multiband photometries from a data set with Gaia parallaxes, LAMOST atmospheric parameters, and op

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Aathil, Abdullah Mohamed. "Review on Photometric Study of Variable Stars." Acceleron Aerospace Journal 2, no. 6 (2024): 316–28. http://dx.doi.org/10.61359/11.2106-2425.

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This literature review focuses on variable stars, which exhibit changes in brightness over time. This topic is vital in astronomical research, particularly due to the abundance of telescope data available in archives. The photometric study of variable stars is significant for understanding stellar evolution, classifying stars, and contributing to cosmological research. It enables precise distance measurements, examines exoplanetary systems, and identifies rare astronomical phenomena, thereby expanding our understanding of the universe. The study begins by outlining the fundamentals of variable

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Lee, Bomee, and Ranga-Ram Chary. "Improved photometric redshifts with colour-constrained galaxy templates for future wide-area surveys." Monthly Notices of the Royal Astronomical Society 497, no. 2 (2020): 1935–45. http://dx.doi.org/10.1093/mnras/staa2100.

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ABSTRACT Cosmology and galaxy evolution studies with LSST, Euclid, and Roman, will require accurate redshifts for the detected galaxies. In this study, we present improved photometric redshift estimates for galaxies using a template library that populates three-colour space and is constrained by HST/CANDELS photometry. For the training sample, we use a sample of galaxies having photometric redshifts that allows us to train on a large, unbiased galaxy sample having deep, unconfused photometry at optical-to-mid infrared wavelengths. Galaxies in the training sample are assigned to cubes in 3D col

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ČAVLOVIĆ, ANKA OZANA, and IVAN BEŠLIĆ. "APPLICATION OF PHOTOMETRY IN DETERMINING THE DUST MASS CONCENTRATION OF HARDWOODS." WOOD RESEARCH 66(4) 2021 66, no. 4 (2021): 678–88. http://dx.doi.org/10.37763/wr.1336-4561/66.4.678688.

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Given the carcinogenicity of hardwood dust, the aim of this study was to determine the effectiveness of the photometric method for different types of woodworking machines and its application in determining the mass concentration of inhalable dust for raw and dry hardwoods. In addition to the optical part of the device, the input part of the measuring device contains the Institute of Occupational Medicine (IOM) inhalable dust filter holder. This correlation of gravimetric and photometric methods in determining the dust mass concentration showed that photometry underestimates the mass concentrat

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Krugly, Yu N., N. M. Gaftonyuk, I. N. Belskaya, et al. "Kharkiv study of near-Earth asteroids." Proceedings of the International Astronomical Union 2, S236 (2006): 385–90. http://dx.doi.org/10.1017/s174392130700347x.

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AbstractThe regular CCD observations of near-Earth asteroids (NEAs) in the Institute of Astronomy of Kharkiv National University were initiated in 1995 within the framework of asteroid hazard problem in collaboration with the DLR, Institute of Planetary Research (Berlin). The main aim of the study is a determination of rotation periods and shapes of NEAs as well as astrometry of newly discovered objects. We also carry out the absolute photometry of NEAs in BVRI bands in order to put constraints on surface properties and to estimate their diameters. The observations are carried out with 0.7-m t

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Jeong, Hyeon, Soogyum Kim, Euijoon Lee, Hyunmin Ko, and Ho Lee. "Photometric Observations of Open Clusters Using Mobile Phone Camera." Korean Science Education Society for the Gifted 17, no. 1 (2025): 148–55. https://doi.org/10.29306/jseg.2025.17.1.148.

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This study explores the feasibility of conducting photometric observations using mobile phones in combination with small telescopes. For this study photometric observations of the open cluster M45 (Pleiades) were carried out using a mobile phone camera mounted on a small telescope. Due to the limited full well capacity of the mobile sensor, stacking multiple short-exposure images proved more effective than long-exposure imaging for determining the magnitudes of a greater number of stars. To place the data on a standard photometric scale, Bayer filter magnitudes derived from the mobile phone we

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7

Rios-Venegas, C., A. Contreras-Quijada, N. Vogt, et al. "Revisiting the post-common-envelope binaries HZ 9, KV Vel and Abell 65." Monthly Notices of the Royal Astronomical Society 493, no. 1 (2020): 1197–203. http://dx.doi.org/10.1093/mnras/staa331.

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ABSTRACT New time-resolved photometric observations of three close but detached white dwarf/red dwarf binaries have enabled an in-depth analysis of their properties, combining new data with known information. For HZ 9, time-resolved photometric data have not been published previously. Our data reveal sinusoidal variations, with the orbital period showing unusual phase shifts between expected and observed light maximum epochs when combining our photometry with the precise radial velocity ephemeris. There are also variations of the photometric amplitude between 0.04 and 0.11 mag. Phase shifts an

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Larionova, Kira O., and Sergey V. Stetsky. "The Influence of Multi-Storey Surrounding Development on a Daylighting of Interiors in Top-Lit Premises: An Experimental Study." Light & Engineering, no. 02-2023 (April 2023): 30–38. http://dx.doi.org/10.33383/2023-006.

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To ensure a required daylight in premises with top system of outdoor illumination through roof lighting installations, it is necessary to take into account the photometrical effects of surrounding development. For the time being such a concept in lighting engineering design is adopted only for side lit premises through windows, though the dense urban development in modern megalopolises offers nearly the same problem for buildings with overhead daylighting system. This paper presents a brief description of experimental case studies, based on the scale model method, as well as on the photometric

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9

Mantegazza, L., та E. Poretti. "Insights into the Pulsational Behaviour of δ Sct Stars". International Astronomical Union Colloquium 155 (1995): 337–38. http://dx.doi.org/10.1017/s0252921100037386.

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Extensive photometric monitoring of bright δ Scuti stars, made in the last years, allowed us to get reliable frequency determinations also in very complicated cases. Table 1 gives a full description of our photometric targets. Recently, we realized that combining photometry with simultaneous high resolution spectroscopy, in order to study line profile variations, offers the possibility to perform a much more reliable mode identification. Hence, the photometric runs of FG Vir, X Cae, HD 2724 were paired with spectroscopic ones obtained at the Coudé Auxiliary Telescope (ESO, La Silla, Chile). Th

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10

Vioque, M., R. D. Oudmaijer, D. Baines, I. Mendigutía, and R. Pérez-Martínez. "Gaia DR2 study of Herbig Ae/Be stars." Astronomy & Astrophysics 620 (December 2018): A128. http://dx.doi.org/10.1051/0004-6361/201832870.

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Aims. We use Gaia Data Release 2 (DR2) to place 252 Herbig Ae/Be stars in the Hertzsprung–Russell diagram and investigate their characteristics and properties. Methods. For all known Herbig Ae/Be stars with parallaxes in Gaia DR2, we collected their atmospheric parameters and photometric and extinction values from the literature. To these data we added near-infrared and mid-infrared photometry, and collected Hα emission line properties such as equivalent widths and line profiles, and their binarity status. In addition, we developed a photometric variability indicator from Gaia’s DR2 informatio

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11

Burkhead, M. S. "A photometric study of M104." Astronomical Journal 91 (April 1986): 777. http://dx.doi.org/10.1086/114059.

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12

Arevalo, M. J., C. Lazaro, and J. J. Fuensalida. "Photometric study of ER VUL." Astronomical Journal 96 (September 1988): 1061. http://dx.doi.org/10.1086/114866.

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13

TADROSS, A. L., and Y. H. M. HENDY. "PHOTOMETRIC STUDY OF IC 2156." Journal of The Korean Astronomical Society 49, no. 2 (2016): 53–57. http://dx.doi.org/10.5303/jkas.2016.49.2.53.

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14

Marton, S. F., A. Grieco, and R. F. Sistero. "RW Doradus: a photometric study." Monthly Notices of the Royal Astronomical Society 240, no. 4 (1989): 931–40. http://dx.doi.org/10.1093/mnras/240.4.931.

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15

Chaubey, U. S. "Photometric study of MM Cas." Astrophysics and Space Science 189, no. 2 (1992): 263–70. http://dx.doi.org/10.1007/bf00643129.

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16

Srivastava, R. K., and Wahab Uddin. "Photometric study of BZ Eridani." Astrophysics and Space Science 126, no. 1 (1986): 105–18. http://dx.doi.org/10.1007/bf00644179.

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17

Verbiscer, Anne J., and Joseph Veverka. "A Photometric Study of Enceladus." Icarus 110, no. 1 (1994): 155–64. http://dx.doi.org/10.1006/icar.1994.1112.

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18

E., Eugenio, and Mendoza V. "A Photometric Study of Herbig Ae/Be Stars." International Astronomical Union Colloquium 92 (August 1987): 529–31. http://dx.doi.org/10.1017/s0252921100116768.

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It is well known (cf. Mendoza 1983) that “classical“ Be stars, and Herbig Ae/Be objects, in addition to hydrogen lines in emission, also share at least two photometric characteristics, namely, light varitions, and infrared color excesses.We have selected the α(16)⋀(9) {Mendoza 1979}, and the JHKL-photometric systems, in order to study some photometric properties of Be stars. The observations have been carried out at the National Astronomical Observatory (San Pedro Martir, B.C.N., and Tonantzintla, Pue.), Mexico, from 1976 to 1986.

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19

Cao, Huilai, Zhongwei Li, Lin Huang, and Yulian Guo. "A Spectroscopic and Photometric Study of the Shell Star EW Lac." International Astronomical Union Colloquium 175 (2000): 554–57. http://dx.doi.org/10.1017/s0252921100056499.

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AbstractWe report on combined spectroscopic and photometric observations of EW Lac during its outburst of 1983. At this time the star’s Hα and Hβ lines showed strong doubled-peaked emission profiles which were variable with time. UBV photometry exhibited a long-term and frequent erratic short-term variations. The amplitude of U, B and V variations reached about 0.3 magnitude on October 15, 1983. Both Hβ emission and the structure of the shell absorption lines of the star also displayed anomalous behavior in 1983. It is evident that this star was in a strong active phase at that time.

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20

Surot, F., E. Valenti, S. L. Hidalgo, et al. "Mapping the stellar age of the Milky Way bulge with the VVV." Astronomy & Astrophysics 629 (August 22, 2019): A1. http://dx.doi.org/10.1051/0004-6361/201935730.

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Context. The bulge represents the best compromise between old and massive Galactic components, and as such its study is a valuable opportunity to understand how the bulk of the Milky Way formed and evolved. In addition, being the only bulge in which we can individually resolve stars in all evolutionary sequences, the properties of its stellar content provide crucial insights into the formation of bulges. Aims. We are providing a detailed and comprehensive census of the Milky Way bulge stellar populations by producing deep and accurate photometric catalogs of the inner ∼300 deg2 of the Galaxy.

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21

Kodaira, Keiichi, Masanori Iye, Sadanori Okamura, and Alan Stockton. "An Observational Study of Shakhbazyan's Compact Group of Galaxies 202." Publications of the Astronomical Society of Japan 40, no. 5 (1988): 533–45. https://doi.org/10.1093/pasj/40.5.533.

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Abstract Photometric and spectroscopic observations of Shakhbazyan’s compact group of galaxies (SCGG) 202 are presented. V magnitudes and (B–V) colors have been obtained for the five brightest members. All of them have (B–V) ~ 1.0 typical of elliptical and S0 galaxies. Surface photometry is presented for the 2′ × 3′ central part of the group. A comparison of the photometric parameters of two galaxies in the frame, Nos. 1 and 5, with those of Virgo galaxies shows that they are similar to the elliptical and SO galaxies in the Virgo cluster which are located close to the high surface brightness l

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22

Stahl, Benjamin E., Thomas de Jaeger, WeiKang Zheng, and Alexei V. Filippenko. "The snapshot distance method: estimating the distance to a Type Ia supernova from minimal observations." Monthly Notices of the Royal Astronomical Society 505, no. 2 (2021): 2300–2308. http://dx.doi.org/10.1093/mnras/stab1367.

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ABSTRACT We present the snapshot distance method (SDM), a modern incarnation of a proposed technique for estimating the distance to a Type Ia supernova (SN Ia) from minimal observations. Our method, which has become possible owing to recent work in the application of deep learning to SN Ia spectra (we use the deepSIP package), allows us to estimate the distance to an SN Ia from a single optical spectrum and epoch of 2 + passband photometry – one night’s worth of observations (though contemporaneity is not a requirement). Using a compilation of well-observed SNe Ia, we generate snapshot distanc

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23

Sarrouh, Ghassan T. E., Adam Muzzin, Kartheik G. Iyer, et al. "Exposing Line Emission: The Systematic Differences of Measuring Galaxy Stellar Masses with JWST NIRCam Medium versus Wide Band Photometry." Astrophysical Journal Letters 967, no. 1 (2024): L17. http://dx.doi.org/10.3847/2041-8213/ad43e8.

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Abstract Photometrically derived stellar masses are known to suffer from systematic uncertainties, particularly due to nebular emission contributions to the spectral energy distribution (SED). Using James Webb Space Telescope NIRCam imaging from the CAnadian NIRISS Unbiased Cluster Survey, we introduce a comparison study of photometrically derived redshifts and stellar masses based on two photometric catalogs of the same field spanning ∼0.4–4.5 μm: one consisting solely of wide band photometry, and another employing a combination of wide and medium band photometry. We find that ∼70% of likely

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24

Wing, Robert F. "Applications of Narrow-Band Photometry in the Study of Peculiar Red Giants." Symposium - International Astronomical Union 177 (2000): 127–40. http://dx.doi.org/10.1017/s0074180900002333.

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Narrow-band photometry, carried out with filters or spectrum scanners, is useful for measuring molecular bandstrengths and continuum energy distributions in late-type stars. This review emphasizes observations by the writer on three different multicolor photometric systems in the near infrared (0.75 − 4.0 μm); a summary of available data is given. While applications to date have been primarily qualitative (classification, recognition of peculiarities, relative temperatures), future applications are expected to be quantitative (determinations of effective temperatures, luminosities, and abundan

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Innis, J. L., D. W. Coates, K. Thompson, G. J. Nelson, O. B. Slee, and Alan E. Wright. "An Optlcal and Radio Investigation of the Active RS CVn Star HD 127535." Publications of the Astronomical Society of Australia 6, no. 2 (1985): 160–64. http://dx.doi.org/10.1017/s1323358000017999.

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AbstractWe present some preliminary results of an optical and radio study of the very active RS CVn binary HD 127535. Photometric measurements show the presence of a large amplitude wave which exhibits marked changes in shape and range on time scales as short as a few months. This photometric variation is almost certainly due to large cool starspots on the cooler, more luminous component. As part of a survey of southern active-chromosphere stars with the Parkes radio telescope, HD 127535 has been observed at 5, 8.4 and 22 GHz. No detection was made at 5 GHz, possibly because of confusion due t

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26

Ma, Wen-Wu, Er-Gang Zhao, and Thawicharat Sarotsakulchai. "Photometric study of semi-detached eclipsing binary TW Cas based on TESS photometry." New Astronomy 93 (May 2022): 101741. http://dx.doi.org/10.1016/j.newast.2021.101741.

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27

Djurašević, G., B. Albayrak, T. Tanrıverdi, and S. Erkapić. "A photometric study of NN Virginis." Astronomy & Astrophysics 415, no. 1 (2004): 283–87. http://dx.doi.org/10.1051/0004-6361:20034618.

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28

de Epstein, A. E. A., and I. Epstein. "Photometric study of Zeta SCULPTORIS cluster." Astronomical Journal 90 (July 1985): 1211. http://dx.doi.org/10.1086/113828.

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29

Goderya, S. N., K. C. Leung, and E. G. Schmidt. "A Photometric Study of V508 Cygni." Astronomical Journal 110 (July 1995): 346. http://dx.doi.org/10.1086/117525.

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30

Papadaki, C., H. M. J. Boffin, C. Sterken, et al. "Photometric study of selected cataclysmic variables." Astronomy & Astrophysics 456, no. 2 (2006): 599–609. http://dx.doi.org/10.1051/0004-6361:20054679.

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31

Kim, Chulhee, and B. K. Moon. "A Photometric Study of ZZ Microscopium." Publications of the Astronomical Society of the Pacific 121, no. 879 (2009): 478–84. http://dx.doi.org/10.1086/599845.

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32

Zoła, S., P. Niarchos, V. Manimanis, and A. Dapergolas. "A photometric study of BH Cas." Astronomy & Astrophysics 374, no. 1 (2001): 164–70. http://dx.doi.org/10.1051/0004-6361:20010677.

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33

Evans, E. E. ,. III, D. H. Grossoehme, and E. J. ,. Jr Moyer. "A photometric study of AO Camelopardalis." Publications of the Astronomical Society of the Pacific 97 (July 1985): 648. http://dx.doi.org/10.1086/131580.

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34

Alexander, A. L., M. D. Joner, and D. H. McNamara. "A photometric study of BL Herculis." Publications of the Astronomical Society of the Pacific 99 (July 1987): 645. http://dx.doi.org/10.1086/132028.

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35

Han, Won-Yong, and Tu-Hwan Kim. "A photometric study of UV PISCIUM." Publications of the Astronomical Society of the Pacific 100 (August 1988): 964. http://dx.doi.org/10.1086/132258.

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Kim, C., and M. Joner. "A Photometric Study of V798 Cygni." Publications of the Astronomical Society of the Pacific 109 (September 1997): 951. http://dx.doi.org/10.1086/133966.

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37

İbanoğlu, C. "Extensive photometric study of V471 Tauri." Astrophysics and Space Science 161, no. 2 (1989): 221–31. http://dx.doi.org/10.1007/bf00653568.

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38

Showalter, Mark R., James B. Pollack, Maureen E. Ockert, Laurance R. Doyle, and J. Brad Dalton. "A photometric study of Saturn's Ring." Icarus 100, no. 2 (1992): 394–411. http://dx.doi.org/10.1016/0019-1035(92)90107-i.

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Niarchos, P. G., H. Rovithis-Livaniou, and P. Rovithis. "A photometric study of V566 ophiuchi." Astrophysics and Space Science 203, no. 2 (1993): 197–210. http://dx.doi.org/10.1007/bf00658988.

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40

Rodríguez-Sanz, Jacobo, Miguel Malo-Urriés, Sergio Borrella-Andrés, Isabel Albarova-Corral, and Carlos López-de-Celis. "Validation of Ultrasound for Quantification of Knee Meniscal Tissue: A Cadaveric Study." Diagnostics 15, no. 3 (2025): 389. https://doi.org/10.3390/diagnostics15030389.

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Background: While MRI is the gold standard for meniscal assessment, its cost and accessibility limitations have led to growing interest in ultrasound, though its validity for quantifying meniscal tissue remains unclear. To validate the use of ultrasound in quantifying meniscal tissue across the anterior, middle, and posterior regions of both menisci (medial and lateral) in longitudinal and transverse planes by comparison with cadaveric dissection. Methods: A cross-sectional study was conducted on ten cryopreserved anatomical donors, obtaining a total of 120 ultrasound scans from the different

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Li, Dan, Chuan Jiao Sun, Wen Ying Su, Xuan Wang, and Wei Wang. "Study on Photometric Performance Attenuation Law of Retroreflective Materials for Road Traffic." Advanced Materials Research 490-495 (March 2012): 3568–73. http://dx.doi.org/10.4028/www.scientific.net/amr.490-495.3568.

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The testing and evaluation of the retroreflective materials are the basic work of the road traffic engineering quality. In this paper, artificial neural networks are used to make the study on the photometric performance attenuation law of retroreflection materials. Through the establishment of photometric prediction models to forecast reflection coefficient of the different types of retroreflective sheeting, compared with the testing values, the results showed that photometric performance attenuation law can predict the coefficient of retroreflection of retroreflective sheeting. This conclusio

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Surace, C., G. Comte, J. Guibert, and O. Moreau (Liege). "An Optical Study of a Sample of Active Galaxies." International Astronomical Union Colloquium 148 (1995): 503–4. http://dx.doi.org/10.1017/s0252921100022430.

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AbstractA new sample of active galaxies was obtained with the ESO Schmidt telescope. We derived quantitative redshifts for 97 emission line galaxies and semi-quantitative photometric and spectro-photometric properties for 62 of them. The results are directly extracted from the Schmidt plates after digitization by the MAMA machine of Observatoire de Paris (C.A.I, INSU Paris).

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Brincat, M. S., C. Galdies, W. Grech, F. Tavakkoli, and K. Hills. "A PHOTOMETRIC STUDY OF THE ACTIVE EW/RS BINARY STAR SYSTEM: GSC 05586-00371." Open European Journal on Variable stars, no. 231 (2022): 1–23. http://dx.doi.org/10.5817/oejv2022-0231.

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GSC 05586-00371 is a fast-rotating (Prot ≈ 0.44 days) eclipsing binary. Our study showed that this star system is an overcontact eclipsing binary star that belongs to the W UMa class with characteristics of RS CVn type stars. We studied this binary system by photometric means through the V and I bandpass where data by the ASAS-SN survey have also been utilized. our photometry yielded a more precise orbital period that was obtained on its discovery. ASAS-SN data over a 6-year period revealed a long-term photometric wave that is attributed to star spot activity. We monitored the binary system ov

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Gorobets, Leonid V., Andrey V. Sapogovskiy, Evgenii V. Melchenko, Aleksandr N. Kasev, and Vladimir M. Kenis. "A Photometric Method for Measuring Ankle Dorsiflexion Reproducibility in Young Athletes." Pediatric Traumatology, Orthopaedics and Reconstructive Surgery 13, no. 2 (2025): 154–60. https://doi.org/10.17816/ptors680803.

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BACKGROUND: Ankle dorsiflexion is one of the most important biomechanical indicators of the potential functional capacity of the foot. Its quantitative assessment is crucial in clinical evaluation, and in determining children’s readiness for sports and their potential risk of sports-related injuries. AIM: This study aimed to evaluate the reproducibility of a photometric method for measuring ankle dorsiflexion angles in young athletes in relation to the conventional goniometric method. METHODS: This study included 30 children aged 6–12 years who participated in regular sports activities and had

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45

Bondariev, Denys, Natalia Bezugla, Paweł Komada, Nataliia Stelmakh, and Mykhailo Bezuglyi. "Optical Properties of Light-Scattering Standards for CCD Photometry." Sensors 23, no. 18 (2023): 7700. http://dx.doi.org/10.3390/s23187700.

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This paper analyzes the light-scattering standards currently used for calibration (verification) and systematic research in photo and spectrophotometry tools. The application specificities in studying the diffuse reflected and transmitted light during biomedical CCD photometry are considered. The advantages of a new class of photometers with non-spherical reflectors as ellipsoids of revolution truncated along the focal planes with the internal mirror surface are presented. The ellipsoid first focal plane is combined with the surface of the under-study media, and the second is optically coupled

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Hsu, Brian, Griffin Hosseinzadeh, V. Ashley Villar, and Edo Berger. "Photometrically Classified Superluminous Supernovae from the Pan-STARRS1 Medium Deep Survey: A Case Study for Science with Machine-learning-based Classification." Astrophysical Journal 937, no. 1 (2022): 13. http://dx.doi.org/10.3847/1538-4357/ac87ff.

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Abstract With the upcoming Vera C. Rubin Observatory Legacy Survey of Space and Time (LSST), it is expected that only ∼0.1% of all transients will be classified spectroscopically. To conduct studies of rare transients, such as Type I superluminous supernovae (SLSNe), we must instead rely on photometric classification. In this vein, here we carry out a pilot study of SLSNe from the Pan-STARRS1 Medium Deep Survey (PS1-MDS), classified photometrically with our SuperRAENN and Superphot algorithms. We first construct a subsample of the photometric sample using a list of simple selection metrics des

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Verkhodanov, O. V., Yu N. Parijskij, N. S. Soboleva, et al. "Photometric Study of Radio Galaxies in the RATAN-600 “Cold” Survey." International Astronomical Union Colloquium 184 (2002): 310–11. http://dx.doi.org/10.1017/s0252921100030943.

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AbstractAbout 100 steep-spectrum radio sources from the RATAN-600 RC catalog were mapped by the VLA and identified with optical objects down to 24m–25m in the R band using the 6-m telescope. An updated list of calibrators with known redshifts of the same class of RGs was compiled to evaluate the accuracy of photometric redshift estimates. BVRI photometry for 60 RC objects was performed with the 6-m telescope, and by standard model fitting we have estimated color redshifts and ages of the stellar populations of the host gE galaxies. The mean redshift of FR II RGs from the RC list turned out to

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48

Davis Philip, A. G. "Precision CCD Photometry of the Horizontal Branch." Symposium - International Astronomical Union 167 (1995): 361–62. http://dx.doi.org/10.1017/s0074180900056801.

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The Strömgren four-color system is well suited to the measure and analysis of horizontal-branch stars. The increased accuracy of the CCD photometric system and the ability to measure fainter stars in very crowded regions make the combination of the CCD system and four-color photometry an excellent one to study horizontal-branch stars in globular clusters.

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49

Deshmukh, S. P. "Spectro - Photometric study of star forming early type galaxies." International Journal of Science and Social Science Research 1, no. 3 (2023): 69–98. https://doi.org/10.5281/zenodo.13513193.

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Abstract:

We combine the results of optical spectroscopy and photometry of a sample of local early type galaxies by Sloan Digital Sky Survey(SDSS) with spectral energy distribution fitting using the Ultraviolet to midIR photometric data. Among the 50 galaxies from present sample, 39 were found to occupy the position of ”Blue-cloud” and ”Green valley” region in the CMD plane. We compute the parameters such as stellar mass, dust mass, dust luminosity, specific star formation rate and it’s correlation with central black hole mass. This could depict a scenario suggesting ba two

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50

Deshmukh, S. P. "Spectro - Photometric study of star forming early type galaxies." International Journal of Science and Social Science Research 1, no. 3 (2023): 69–98. https://doi.org/10.5281/zenodo.13513193.

Full text

Abstract:

We combine the results of optical spectroscopy and photometry of a sample of local early type galaxies by Sloan Digital Sky Survey(SDSS) with spectral energy distribution fitting using the Ultraviolet to midIR photometric data. Among the 50 galaxies from present sample, 39 were found to occupy the position of ”Blue-cloud” and ”Green valley” region in the CMD plane. We compute the parameters such as stellar mass, dust mass, dust luminosity, specific star formation rate and it’s correlation with central black hole mass. This could depict a scenario suggesting ba two

APA, Harvard, Vancouver, ISO, and other styles

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