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Cited by 116Astrophysical Phenomena and ObservationsAstrophysics and Cosmic PhenomenaGalaxies: Formation, Evolution, Phenomena

The DOI matches its Crossref record; 96 of the 96 references it cites were found in a registry or an index.

AN XMM-NEWTON SURVEY OF THE SOFT X-RAY BACKGROUND. III. THE GALACTIC HALO X-RAY EMISSION

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Henley, David B., Shelton, Robin L.·2013·The Astrophysical Journal
DOI 10.1088/0004-637x/773/2/92
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Abstract

We present measurements of the Galactic halo's X-ray emission for 110 XMM-Newton sight lines selected to minimize contamination from solar wind charge exchange emission. We detect emission from few million degree gas on ∼4/5 of our sight lines. The temperature is fairly uniform (median = 2.22 × 10 6 K, interquartile range = 0.63 × 10 6 K), while the emission measure and intrinsic 0.5–2.0 keV surface brightness vary by over an order of magnitude (∼(0.4–7) × 10 −3 cm −6 pc and ∼(0.5–7) × 10 −12 erg cm −2 s −1 deg −2 , respectively, with median detections of 1.9 × 10 −3 cm −6 pc and 1.5 × 10 −12 erg cm −2 s −1 deg −2 , respectively). The high-latitude sky contains a patchy distribution of few million degree gas. This gas exhibits a general increase in emission measure toward the inner Galaxy in the southern Galactic hemisphere. However, there is no tendency for our observed emission measures to decrease with increasing Galactic latitude, contrary to what is expected for a disk-like halo morphology. The measured temperatures, brightnesses, and spatial distributions of the gas can be used to place constraints on models for the dominant heating sources of the halo. We provide some discussion of such heating sources, but defer comparisons between the observations and detailed models to a later paper.

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Show all 95 references

Research works printed but not linked: 5

  1. Chiappini, 2009, The Galaxy Disk in Cosmological Context, 191
  2. Egger, 1995, A&A, 294, L25
  3. Hasinger, 1993, A&A, 275, 1
  4. Pietz, 1998, A&A, 332, 55
  5. Snowden, 2011, Cookbook for Analysis Procedures for XMM-Newton EPIC MOS Observations of Extended Objects and the Diffuse Background, version 4.3

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Metadata

Authors
Henley, D. B., & Shelton, R. L.
Affiliations
University of Georgia (US)
ORCID
Venue
The Astrophysical Journal
Publisher
American Astronomical Society
Published
2013-07-29
Volume
773
Issue
2
Pages
92
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
DOI
10.1088/0004-637x/773/2/92
OpenAlex
W2027993584
Cited by
116
References
95
Citations by year
2026: 6 · 2025: 13 · 2024: 6 · 2023: 8 · 2022: 8 · 2021: 11 · 2020: 8 · 2019: 9 · 2018: 11 · 2017: 7 · 2016: 10 · 2015: 13 · 2014: 5 · 2013: 1
FWCI
5.21
Type
journal article
Language
en
Open access
Licence
Locations
  • The Astrophysical Journal (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • arXiv (Cornell University)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysical Phenomena and Observations
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Astrophysics and Cosmic Phenomena
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
Keywords
Galactic halo, X-ray emission, soft X-ray background, hot gas, emission measure, surface brightness, Galactic latitude distribution, XMM-Newton survey, solar wind charge exchange

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