Relevant bibliographies by topics / Galactic Centre Lobe (GCL)

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Academic literature on the topic 'Galactic Centre Lobe (GCL)'

Author: Grafiati
Published: 6 September 2023
Last updated: 31 July 2025

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Journal articles on the topic "Galactic Centre Lobe (GCL)"

1

Sofue, Yoshiaki. "The Galactic Center Lobe." Publications of the Astronomical Society of Japan 37, no. 4 (1985): 697–713. https://doi.org/10.1093/pasj/37.4.697.

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Abstract Radio continuum observations of the central region of our Galaxy have revealed an off-plane, Ω-shaped lobe (the galactic center lobe: GCL) with a diameter 200 pc emerging from the nuclear disk toward the positive galactic latitude. The radio spectrum is flat, indicating either a thermal gas origin or synchrotron radiation due to recently accelerated cosmicray electrons. CO line observations show an association of a high-velocity molecular gas with the lobe ridges. The eastern and western lobe ridges are connected to the “radio arc” and Sgr C in which extremely thin filamentary structu
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2

Anderson, L. D., Matteo Luisi, B. Liu, et al. "The Galactic Center Lobe as an H ii Region." Astrophysical Journal 969, no. 1 (2024): 43. http://dx.doi.org/10.3847/1538-4357/ad4d93.

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Abstract The Galactic center lobe (GCL) is an object ∼1° across that is located north of the Galactic center. In the mid-infrared (MIR) the GCL appears as two 8.0 μm filaments between which there is strong 24 μm and radio continuum emission. Due to its morphology and location in the sky, previous authors have argued that the GCL is located in the Galactic center region, created by outflows from star formation or by activity of the central black hole Sagittarius A*. In an associated paper, low-frequency radio emission indicates that the GCL must instead lie foreground to the Galactic center. If
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3

Hurley-Walker, Natasha, L. D. Anderson, M. Luisi, et al. "Low-frequency Absorption and Radio Recombination Line Features of the Galactic Center Lobe." Astrophysical Journal 969, no. 1 (2024): 42. http://dx.doi.org/10.3847/1538-4357/ad4d92.

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Abstract The Galactic center lobe (GCL) is a ∼1° object located north of the Galactic center. In the mid-infrared, the GCL appears as two 8.0 μm filaments that roughly define an ellipse. There is strong 24 μm and radio continuum emission in the interior of the ellipse. Due to its morphology and location in the sky, previous authors have argued that the GCL is created by outflows from star formation in the central molecular zone or by activity of the central black hole Sgr A*. We present images of the GCL from the GaLactic and Extragalactic All-sky Murchison Widefield Array survey in radio cont
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4

Nagoshi, Halca, Kenta Fujisawa, and Yuzo Kubose. "Radio continuum and radio recombination line observations of the Galactic center lobe." Proceedings of the International Astronomical Union 9, S303 (2013): 129–31. http://dx.doi.org/10.1017/s1743921314000374.

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AbstractRadio continuum (cont) and radio recombination line (RRL) observations with the Yamaguchi 32-m radio telescope toward the lower part of the Galactic center lobe (GCL) in the Galactic center region are presented. While two ridges of the GCL were seen in both continuum and RRL images, the spatial coverage of the ridges of the continuum and RRL is not coincident. We distinguish the continuum emission of the GCL into thermal and non-thermal emission by assuming an electron temperature of the ionized gas of 4370 K, estimated based on the line width (14.1 km s−1). The thermal emission was fo
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5

Rickert, M., F. Yusef-Zadeh, and C. Brogan. "Low frequency (74 MHz) radio continuum observations of the inner 13° × 7° of the Galactic center." Proceedings of the International Astronomical Union 9, S303 (2013): 464–66. http://dx.doi.org/10.1017/s1743921314001161.

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AbstractWe analyze a high resolution (114″ × 60″) 74 MHz image of the Galactic center taken with the Very Large Array (VLA). We have identified several absorption and emission features in this region, and we discuss preliminary results of two Galactic center sources: the Sgr D complex (G1.1–0.1) and the Galactic center lobe (GCL).The 74 MHz image displays the thermal and nonthermal components of Sgr D and we argue the Sgr D supernova remnant (SNR) is consistent with an interaction with a nearby molecular cloud and the location of the Sgr D Hii region on the near side of the Galactic center. Th
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6

Law, Casey. "Evidence for a Mass Outflow from Our Galactic Center." Proceedings of the International Astronomical Union 3, S250 (2007): 407–12. http://dx.doi.org/10.1017/s1743921308020760.

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AbstractWe discuss the nature of the Galactic center lobe (GCL), a degree-tall, loop-like structure apparently erupting from the central few hundred parsecs of our Galaxy. Although its coincidence with the Galactic center has inspired diverse models for its origin, the observational evidence connecting this structure to the GC region has been thin. We describe a multiwavelength observing campaign with the VLA, GBT, Spitzer, and other telescopes that finds compelling evidence that the structure is likely formed by a mass outflow from the central tens of parsecs of our Galaxy. The size and mass
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7

Reich, Wolfgang, Yoshiaki Sofue, and Ernst Fürst. "Thermal and Nonthermal Emission Structures in the Galactic Center Region." Publications of the Astronomical Society of Japan 39, no. 4 (1987): 573–87. https://doi.org/10.1093/pasj/39.4.573.

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Abstract By a detailed comparison of background-filtered maps of the 11-cm (2.695-GHz) radio continuum emission and the 60-μm infrared emission for the central 2° × 3° region of the Galaxy we were able to separate nonthermal and thermal emission structures. Based on this comparison we found that the “galactic center lobe (GCL)” basically has nonthermal characteristics. Near Sgr A two possibly nonthermal spurlike structures are noted. The nuclear disk shows unusual high infrared emission. A previously unrecognized supernova remnant was identified.
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8

Wang, Q. Daniel. "Chandra large-scale mapping of the Galactic Centre: probing high-energy structures around the central molecular zone." Monthly Notices of the Royal Astronomical Society 504, no. 2 (2021): 1609–18. http://dx.doi.org/10.1093/mnras/stab801.

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ABSTRACT Recent observations have revealed interstellar features that apparently connect energetic activity in the central region of our Galaxy to its halo. The nature of these features, however, remains largely uncertain. We present a Chandra mapping of the central 2° × 4° field of the Galaxy, revealing a complex of X-ray-emitting threads plus plume-like structures emerging from the Galactic Centre (GC). This mapping shows that the northern plume or fountain is offset from a well-known radio lobe (or the GCL), which however may represent a foreground H ii region, and that the southern plume i
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9

Shibata, Kazunari, and Yutaka Uchida. "A Magnetodynamical Model for the Galactic Center Lobes." Publications of the Astronomical Society of Japan 39, no. 4 (1987): 559–71. https://doi.org/10.1093/pasj/39.4.559.

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Abstract We present an MHD model for the galactic center lobes (GCL) by using an axisymmetric 2.5-dimensional MHD simulation. According to our model, GCL is a low-energy jet emanating from the H II gas disk extending beyond r ~ 100 pc from the galactic center. The model is based on the “sweeping-magnetic-twist” mechanism developed by the authors for the production of cosmic jets, where the gas in the surface layer of the contracting disk is lifted up by the J × B force in the relaxing magnetic twist, which is generated by the interaction of the rotation of the contracting disk with the poloida
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10

Shibata, Kazunari. "MHD Mechanisms for the Formation of Galactic Center Lobes." Symposium - International Astronomical Union 136 (1989): 313–17. http://dx.doi.org/10.1017/s007418090018667x.

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I critically discuss three possible MHD mechanisms for the formation of Galactic center lobes (GCL) found by Sofue and Handa (1984) from the theoretical point of view. The three mechanisms I shall discuss are: (1) sweeping-magnetic-twist mechanism, (2) explosion in a disk with a vertical magnetic field, and (3) nonlinear Parker instability. I review the characteristics of these mechanisms, which are mainly obtained from nonlinear 2D MHD numerical simulations, and discuss their merits and demerits as possible mechanisms for the formation of GCL and related magnetic structures.
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Dissertations / Theses on the topic "Galactic Centre Lobe (GCL)"

1

Sarkar, Kartick Chandra. "Fermi Bubbles and Galactic Outflows in Circumgalactic Medium." Thesis, 2017. http://etd.iisc.ac.in/handle/2005/4225.

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Galactic outflows play an important role in the formation and evolution of galaxies by regulating the star formation rate (SFR) within them and by throwing out metals into the intergalactic medium (IGM). They are key to understand the relation between the stellar and the dark matter halo mass, mass-metallicity relation of galaxies, intergalactic metal enrichment, formation of high velocity clouds and much more. Galactic outflows have been observed to be present in galaxies at all redshifts either in emission or in absorption of the stellar continuum. Outflows have been also detected in the imm
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