Academic literature on the topic 'Hertzsprung'

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Journal articles on the topic "Hertzsprung"

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Langer, N., and R. P. Kudritzki. "The spectroscopic Hertzsprung-Russell diagram." Astronomy & Astrophysics 564 (April 2014): A52. http://dx.doi.org/10.1051/0004-6361/201423374.

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Ayres, Thomas R. "Hot Times in the Hertzsprung Gap." International Astronomical Union Colloquium 152 (1996): 113–20. http://dx.doi.org/10.1017/s0252921100035831.

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Moderate-mass giants represent a touchstone for probing the mechanisms of magnetic activity among fast-rotating convective stars. Extreme ultraviolet and soft X-ray observations of such stars detect generally hot coronae: the Hertzsprung-gap giants (F5–G2), in particular, have remarkable high-excitation peaks (107 K, or hotter) in their emission-measure distributions. While the high-temperature coronal plasmas are reminiscent of violent solar flares, the high-energy spectra of the Hertzsprung-gap giants appear to be quite steady over time; in contrast to other hot-corona objects whose optical
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Wilson, R. E., and Jarrod R. Hurley. "Impersonal parameters from Hertzsprung-Russell diagrams." Monthly Notices of the Royal Astronomical Society 344, no. 4 (2003): 1175–86. http://dx.doi.org/10.1046/j.1365-8711.2003.06895.x.

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van Loon, Jacco Th. "Cool Stars in the Hertzsprung–Russell Diagram." Proceedings of the International Astronomical Union 11, A29B (2015): 475–77. http://dx.doi.org/10.1017/s1743921316005925.

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AbstractAs the opening review to the focus meeting “Stellar Behemoths: Red Supergiants across the Local Universe”, I here provide a brief introduction to red supergiants, setting the stage for subsequent contributions. I highlight some recent activity in the field, and identify areas of progress, areas where progress is needed, and how such progress might be achieved.
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Christensen-Dalsgaard, Jørgen. "A Hertzsprung-Russell diagram for stellar oscillations." Symposium - International Astronomical Union 123 (1988): 295–98. http://dx.doi.org/10.1017/s0074180900158279.

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I present evolutionary tracks and curves of constant central hydrogen abundance in diagrams based on frequencies of high-order, low-degree p modes. For stars with masses between 0.7 and 1.5 M⊙, a clean separation is obtained between the effects of varying mass and varying evolutionary state.
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MacLeod, Morgan, Matteo Cantiello, and Melinda Soares-Furtado. "Planetary Engulfment in the Hertzsprung–Russell Diagram." Astrophysical Journal 853, no. 1 (2018): L1. http://dx.doi.org/10.3847/2041-8213/aaa5fa.

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Zaninetti, L. "Semi-analytical formulas for the Hertzsprung-Russell diagram." Serbian Astronomical Journal, no. 177 (2008): 73–85. http://dx.doi.org/10.2298/saj0877073z.

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The absolute visual magnitude as function of the observed color (B-V), also named Hertzsprung-Russell diagram, can be described through five equations; that when calibrated stars are available means eight constants. The developed framework allows to deduce the remaining physical parameters, mass, radius and luminosity. This new technique is applied to the first 10 pc, the first 50 pc, the Hyades and to the determination of the distance of a cluster. The case of the white dwarfs is analyzed assuming the absence of calibrated data: our equation produces a smaller ?2 with respect to the standard
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Kolb, U. "Soft X-ray transients in the Hertzsprung gap." Monthly Notices of the Royal Astronomical Society 297, no. 2 (1998): 419–26. http://dx.doi.org/10.1046/j.1365-8711.1998.01489.x.

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Hubrig, S., P. North, and G. Mathys. "Magnetic Ap Stars in the Hertzsprung‐Russell Diagram." Astrophysical Journal 539, no. 1 (2000): 352–63. http://dx.doi.org/10.1086/309189.

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Adamczak, Jens, and David L. Lambert. "CARBON AND OXYGEN ABUNDANCES ACROSS THE HERTZSPRUNG GAP." Astrophysical Journal 791, no. 1 (2014): 58. http://dx.doi.org/10.1088/0004-637x/791/1/58.

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Dissertations / Theses on the topic "Hertzsprung"

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Brogt, Erik. "Pedagogical and Curricular Thinking of Professional Astronomers Teaching the Hertzsprung-Russell Diagram in Introductory Astronomy Courses for Non-Science Majors." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195246.

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This qualitative study explores the pedagogical and curricular thinking of five professional astronomers, faculty at a university, about teaching the Hertzsprung-Russell diagram in introductory astronomy courses for non-science majors. Data sources for this study included two semi-structured interviews per participant, in which they were asked about teaching the Hertzsprung-Russell diagram, as well as about the introductory course in general. In addition, participants were asked to complete four cognitive tasks; the creation of a lesson plan, a concept map on how they would like their studen
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Brogt, E. "Pedagogical and curricular thinking of professional astronomers teaching the Hertzsprung-Russell diagram in introductory astronomy courses for non-science majors." Thesis, University of Canterbury. University Centre for Teaching and Learning, 2009. http://gradworks.umi.com/33/52/3352344.html.

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Weisz, Daniel R., Sergey E. Koposov, Andrew E. Dolphin, et al. "A HUBBLE SPACE TELESCOPE STUDY OF THE ENIGMATIC MILKY WAY HALO GLOBULAR CLUSTER CRATER." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621220.

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We analyze the resolved stellar populations of the faint stellar system, Crater, based on deep optical imaging taken with the Advanced Camera for Surveys on the Hubble Space Telescope. Crater's color-magnitude diagram (CMD) extends similar to 4 mag below the oldest main-sequence (MS) turnoff. Structurally, we find that Crater has a half-light radius of similar to 20 pc and no evidence for tidal distortions. We model. Crater's CMD as a simple stellar population (SSP) and alternatively by solving for its full star formation history. In both cases, Crater is well. described by an SSP with an age
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Girardi, Mauricio. "Construção do diagrama Hertzsprung-Russel através do stellarium : uma proposta para explorar conceitos de física moderna e contemporânea no ensino médio." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2017. http://hdl.handle.net/10183/175181.

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Neste trabalho propõe-se explorar conceitos de Física Moderna e Contemporânea (FMC) a partir de fenômenos físicos presentes na física estelar, utilizando o software Stellarium como ferramenta no desenvolvimento de atividades voltadas à construção coletiva de um diagrama Hertzsprung-Russell (diagrama H-R), que é um diagrama muito importante da astrofísica para classificação das estrelas. À luz da teoria de Lev S. Vygotsky, é proposto que os alunos trabalhem em grupos, de forma colaborativa, tanto na obtenção de parâmetros astrofísicos estelares a partir do software, quanto na construção do diag
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Bell, Cameron Pearce MacDonald. "A critical assessment of ages derived using pre-main-sequence isochrones in colour-magnitude diagrams." Thesis, University of Exeter, 2012. http://hdl.handle.net/10036/4017.

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In this thesis a critical assessment of the ages derived using theoretical pre-main-sequence (pre-MS) stellar evolutionary models is presented by comparing the predictions to the low-mass pre-MS population of 14 young star-forming regions (SFRs) in colour-magnitude diagrams (CMDs). Deriving pre-MS ages requires precise distances and estimates of the reddening. Therefore, the main-sequence (MS) members of the SFRs have been used to derive a self-consistent set of statistically robust ages, distances and reddenings with associated uncertainties using a maximum-likelihood fitting statistic and MS
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Milone, A. P., A. F. Marino, L. R. Bedin, et al. "The HST large programme on omega Centauri - I. Multiple stellar populations at the bottom of the main sequence probed in NIR-Optical." OXFORD UNIV PRESS, 2017. http://hdl.handle.net/10150/624420.

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As part of a large investigation with Hubble Space Telescope to study the faintest stars within the globular cluster omega Centauri, in this work we present early results on the multiplicity of its main sequence (MS) stars, based on deep optical and near-infrared observations. By using appropriate colour-magnitude diagrams, we have identified, for the first time, the two main stellar Populations I and II along the entire MS, from the turn-off towards the hydrogen-burning limit. We have compared the observations with suitable synthetic spectra of MS stars and conclude that the two main sequence
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Dieterich, Sergio Bonucci. "Characterization of the Stellar / Substellar Boundary." 2013. http://scholarworks.gsu.edu/phy_astr_diss/66.

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The aim of this dissertation is to address the topic of distinguishing very low mass stars from brown dwarfs through observational means. To that end, we seek to better characterize both populations and establish mechanisms that facilitate establishing an individual object's membership in either the very low mass star or the brown dwarf populations. The dissertation is composed of three separate observational studies. In the first study we report on our analysis of HST/NICMOS snapshot high resolution images of 255 stars in 201 systems within ~10 parsecs of the Sun. We establish magnitude an
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Books on the topic "Hertzsprung"

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Herrmann, Dieter B. Ejnar Hertzsprung. Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78812-3.

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Herrmann, Dieter B. Ejnar Hertzsprung, Pionier der Sternforschung. Springer, 1994.

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Herrmann, Dieter. Astrophysik im Vergleich: Bericht uber eine USA-Reise von Ejnar Hertzsprung im Jahre 1912. Sonderdruck aus der Zeitschrift "Die Sterne", 1990.

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Gautier, Mathys, Solanki Sami K, and Wickramasinghe D. T, eds. Magnetic fields across the Hertzsprung-Russell diagram: Proceedings of a workshop held in Santiago, Chile, 15-19 January 2001. Astronomical Society of the Pacific, 2001.

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Herrmann, Dieter B. Ejnar Hertzsprung: Pionier der Sternforschung. Springer, 2011.

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(Editor), Gautier Mathys, S. K. Solanki (Editor), and D. T. Wickramasinghe (Editor), eds. Magnetic Fields Across the Hertzsprung-Russell Diagram: Proceedings of a Workshop Held in Santiago Chile, 15-19 January 2001 (Astronomical Society of the Pacific conference series). Astronomical Society of the Pacific, 2001.

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Book chapters on the topic "Hertzsprung"

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Herrmann, Dieter B. "Hertzsprung, Ejnar." In Biographical Encyclopedia of Astronomers. Springer New York, 2014. http://dx.doi.org/10.1007/978-1-4419-9917-7_614.

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Herrmann, Dieter B. "Probleme im Ersten Weltkrieg." In Ejnar Hertzsprung. Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78812-3_18.

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Herrmann, Dieter B. "Forschungsaufenthalt am Lick Observatory." In Ejnar Hertzsprung. Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78812-3_33.

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Herrmann, Dieter B. "Geburt und Herkunft." In Ejnar Hertzsprung. Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78812-3_1.

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Herrmann, Dieter B. "Das Astrophysikalische Observatorium Potsdam." In Ejnar Hertzsprung. Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78812-3_10.

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Herrmann, Dieter B. "Schwarzschilds Reise in die USA." In Ejnar Hertzsprung. Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78812-3_11.

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Herrmann, Dieter B. "Russells Weg zu den Riesen und Zwergen und sein Dialog mit Hertzsprung." In Ejnar Hertzsprung. Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78812-3_12.

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Herrmann, Dieter B. "Weitere Untersuchungen über Spektren und Helligkeiten." In Ejnar Hertzsprung. Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78812-3_13.

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Herrmann, Dieter B. "Der ungeeignete Standardstern." In Ejnar Hertzsprung. Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78812-3_14.

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Herrmann, Dieter B. "Reise in die USA (1912)." In Ejnar Hertzsprung. Springer Berlin Heidelberg, 1994. http://dx.doi.org/10.1007/978-3-642-78812-3_15.

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Conference papers on the topic "Hertzsprung"

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Aimran Wan Mohd Kamil, Wan Mohd, Nurul Shazana Abdul Hamid, Marlia Puteh, et al. "Using Interactive Applet to Support Collaborative Learning of The Hertzsprung-Russell Diagram." In 2019 6th International Conference on Space Science and Communication (IconSpace). IEEE, 2019. http://dx.doi.org/10.1109/iconspace.2019.8905949.

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