搜索结果: 1-15 共查到“天文学 Hot Gas”相关记录16条 . 查询时间(0.101 秒)
X-Raying A2125: A Large-Scale Hierarchical Complex of Galaxies and Hot Gas
Abell 2125 X-rays
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2014/12/24
We present an 82 ks Chandra ACIS-I observation of a large-scale hierarchical complex, which consists of various clusters/groups of galaxies and low surface brightness X-ray emission at z = 0.247. This...
Warm-hot gas in and around the Milky Way: Detection and implications of OVII absorption toward LMC X-3
LMC X–3 ISM
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2014/12/24
X-ray absorption lines of highly ionized species such as O VII at about zero redshift have been firmly detected in the spectra of several active galactic nuclei. However, the location of the absorbing...
Extra-planar Diffuse Hot Gas Around Normal Disk Galaxies
Hot Gas Galaxies
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2014/12/24
I review results from Chandra observations of nearby normal edge-on galaxies (Sd to Sa types). These galaxies have a broad range of star formation rate, but none of them is dominated by a nuclear star...
The Nonisothermality and Extent of Galactic Diffuse Hot Gas toward Markarian 421
ISM Mrk 421
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2014/12/23
Diffuse hot gas can be traced effectively by its X-ray absorption and emission. We present a joint analysis of these tracers to characterize the spatial and temperature distributions of the Galactic h...
Chandra Detection of Diffuse Hot Gas in and around the M31 Bulge
spiral general
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2014/12/23
We report the detection of diffuse hot gas in M31, using archival Chandra observations that allow us to map out a 30' × 30' field (covering a galactocentric radius up to 4.5 kpc) and to detect sources...
X-RAY AND ULTRAVIOLET SPECTROSCOPY OF GALACTIC DIFFUSE HOT GAS ALONG THE LARGE MAGELLANIC CLOUD X-3 SIGHT LINE
diffuse background halo
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2014/12/23
We present Suzaku spectra of X-ray emission in the fields just off the LMC X-3 sight line. O VII, O VIII, and Ne IX emission lines are clearly detected, suggesting the presence of an optically thin th...
Global Hot Gas in and around the Galaxy
the interstellar medium X-ray
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2014/12/23
The hot interstellar medium traces the stellar feedback and its role in regulating the eco-system of the Galaxy. I review recent progress in understanding the medium, based largely on X-ray absorption...
Confronting feedback simulations with observations of hot gas in elliptical galaxies
X-ray elliptical galaxies hot gas galaxy evolution
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2014/12/23
Elliptical galaxies comprise primarily old stars, which collectively generate a long-lasting feedback via stellar mass-loss and Type Ia SNe. This feedback can be traced by X-ray-emitting hot gas in an...
Missing-iron problem and Type Ia supernova enrichment of hot gas in galactic spheroids
hot gas galactic spheroids
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2014/12/22
Type Ia supernovae (Ia SNe) provide a rich source of iron for hot gas in galactic stellar spheroids. However, the expected supersolar iron abundance of the hot gas is not observed. Instead, X-ray obse...
X-Ray Spectroscopy of Galactic Hot Gas along the PKS 2155$-$304 Sight Line,
X-Ray Spectroscopy
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2014/12/20
We present a detailed spectroscopic study of the hot gas in the Galactic halo toward the direction of a blazer PKS 2155304 ( 0.117). The OVII and OVIII absorption lines were measured with the Low and ...
Revisiting with Chandra the Scaling Relations of the X-ray Emission Components (Binaries, Nuclei and Hot Gas) of Early Type Galaxies
galaxies elliptical and lenticular – X-rays galaxies
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2010/11/15
We have selected a sample of 30 normal (non-cD) early type galaxies, for all of which optical spectroscopy is available, and which have been observed with Chandra to a depth such to insure the detecti...
The stellar and hot gas content of low-mass galaxy clusters
galaxies: clusters
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2010/11/10
We analyse the stellar and hot gas content of 18 nearby, low-mass galaxy clusters, detected in
redshift space and selected to have a dynamical mass 3 × 1014 < M/M⊙ < 6 × 1014 (h =0.7), as measured fr...
Hot gas in the large magellanic cloud
Hot gas large magellanic cloud
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2009/6/5
Hot gas in the large magellanic cloud。
On determining the sources of hot gas in the halo
hot gas halo
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2009/6/5
On determining the sources of hot gas in the halo。
Hot gas and the gaseous structure of the galaxy
HYDRODYNAMICS SUPERNOVAREMNANTS X-RAYS GALAXIES
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2009/6/4
A parochial review is presented concerning the status of our understandingof hot gas regions in the Galaxy and their implications for the overall distributionsof the Galaxy抯 gaseous components. We hav...