搜索结果: 1-15 共查到“天文学 Diffuse”相关记录27条 . 查询时间(0.18 秒)
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...
Diffuse X-Rays from the Arches and Quintuplet Clusters
thermal shock waves
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2014/12/24
The origin and initial mass function of young stellar clusters near the Galactic center are still poorly understood. Two of the more prominent ones, the Arches and Quintuplet clusters, may have formed...
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...
The Galactic Central Diffuse X-Ray Enhancement: A Differential Absorption/Emission Analysis
3C 273 Mrk 421
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2014/12/23
The soft X-ray background shows a general enhancement toward the inner region of the Galaxy. But whether this enhancement is a local feature (e.g., a superbubble within a distance of 200 pc) and/or a ...
Chandra and XMM–Newton detection of large-scale diffuse X-ray emission from the Sombrero galaxy
Sombrero NGC 4594
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2014/12/23
We present an X-ray study of the massive edge-on Sa galaxy, Sombrero (M 104; NGC 4594), based on XMM–Newton and Chandra observations. A list of 62 XMM–Newton and 175 Chandra discrete X-ray sources is ...
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...
Energy spectra of the soft X-ray diffuse emission in fourteen fields observed with Suzaku
disk halo
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2014/12/23
Energy spectra of the soft X-ray diffuse emission in fourteen fields observed with Suzaku.
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...
DETECTION OF DIFFUSE NEUTRAL INTRAGROUP MEDIUM IN HICKSON COMPACT GROUPS
new Green Bank Telescope gas mass fraction
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2014/12/20
We present new Green Bank Telescope (GBT) 21 cm neutral hydrogen (H I) observations of a complete distance-limited sample of 22 Hickson Compact Groups (HCGs) with at least four true members. We detect...
Measures of Star Formation Rates within Galaxies: the Impact of Diffuse Stellar Populations
galaxies:ISM ISM:structure infrared:galaxies infrared:ISM H{\sc ii} regions
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2014/12/9
Thanks to the {\it Spitzer Space Telescope}, the infrared (IR) emission have been better studied in the past decades, as well as its relations to star formation rates (SFR) and the calibrations of IR ...
Fermi-LAT Observations of the Diffuse Gamma-Ray Emission: Implications for Cosmic Rays and the Interstellar Medium
Fermi-LAT Observations Diffuse Gamma-Ray Emission Implications Cosmic Rays the Interstellar Medium
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2012/2/23
The gamma-ray sky >100 MeV is dominated by the diffuse emissions from interactions of cosmic rays with the interstellar gas and radiation fields of the Milky Way. Observations of these diffuse emissio...
Diffuse Neutrino Flux
Diffuse Neutrino Flux
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2011/9/29
The search for a diffuse neutrino flux component from astrophysical sources complements searches for point sources. In 2010 and 2011 many new results have been published on this subject. Realistic mod...
The Interaction of Cosmic Rays with Diffuse Clouds
Interaction Cosmic Rays Diffuse Clouds
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2011/9/29
We study the change in cosmic-ray pressure, the change in cosmic-ray density, and the level of cosmic-ray induced heating via Alfven-wave damping when cosmic rays move from a hot ionized plasma to a c...
Diffuse emission measurement with INTEGRAL/SPI as indirect probe of cosmic-ray electrons and positrons
Galaxy: general ?Galaxy structure ?gamma rays observations
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2011/8/24
Significant advances have been made in the understanding of the diffuse Galactic hard X-ray continuum emission using data from the INTEGRAL observatory. The diffuse hard power-law component seen with ...
Diffuse emission measurement with INTEGRAL/SPI as indirect probe of cosmic-ray electrons and positrons
INTEGRAL/SPI indirect probe cosmic-ray electrons positrons
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2011/9/26
Significant advances have been made in the understanding of the diffuse Galactic hard X-ray continuum emission using data from the INTEGRAL observatory. The diffuse hard power-law component seen with ...