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Related papers: Evidence for Hot, Diffuse Gas in the Local Supercl…

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We present a correlation analysis of the diffuse X-ray background emission of the ROSAT all-sky survey with the Leiden/Dwingeloo 21-cm HI line survey. We derive a consistent model for the diffuse X-ray background emission over about 50% of…

Astrophysics · Physics 2015-06-24 J. Pradas , J. Kerp , P. M. W. Kalberla

We present an analysis of the diffuse hard X-ray emission in the core of the young massive Galactic cluster Westerlund 1 based on a 48 ks XMM-Newton observation. Chandra results for the diffuse X-ray emission have indicated a soft thermal…

High Energy Astrophysical Phenomena · Physics 2011-06-15 P. J. Kavanagh , L. Norci , E. J. A. Meurs

We use simulations to predict the X-ray surface brightness distribution arising from hot, cosmologically distributed diffuse gas. The distribution is computed for two bands: 0.5-2 keV and 0.1-0.4 keV, using a cosmological-constant dominated…

Astrophysics · Physics 2009-11-06 Greg L. Bryan , G. Mark Voit

We present new Chandra X-ray observations of the luminous X-ray cluster, MS0451.6-0305, at z=0.5386. Spectral imaging data for the cluster are consistent with an isothermal cluster of 10.0 - 10.6 +/-1.6 keV and an Fe abundance of 0.32-0.40…

The hot Local Bubble surrounding the solar neighborhood has been primarily studied through observations of its soft X-ray emission. The measurements were obtained by attributing all of the observed local soft X-rays to the bubble. However,…

Astrophysics · Physics 2009-06-23 Robin L. Shelton

A mosaic of 7 ROSAT PSPC pointed observations in the direction of (l,b ~ 10,0 deg) reveals deep X-ray shadows in the 0.5-2.0 keV band cast by dense molecular gas. The comparison between the observed on-cloud and off-cloud X-ray fluxes…

Astrophysics · Physics 2009-10-28 Sangwook Park , John P. Finley , Steven L. Snowden , Thomas M. Dame

Over the last 3 yrs, the Galactic center (GC) region has been monitored with the Chandra X-Ray Observatory. With 11 Chandra observations through 2002 June, the total effective exposure reaches ~590 ks, providing significant photon…

We present calculations of the heliospheric SWCX emission spectra and their contributions in the ROSAT 1/4 keV band. We compare our results with the soft X-ray diffuse background (SXRB) emission detected in front of 378 identified shadowing…

Astrophysics · Physics 2011-02-11 D. Koutroumpa , R. Lallement , J. C. Raymond , V. Kharchenko

Mahdavi et al. find that the degree of agreement between weak lensing and X-ray mass measurements is a function of cluster radius. Numerical simulations also point out that X-ray mass proxies do not work equally well at all radii. The…

Cosmology and Nongalactic Astrophysics · Physics 2009-07-22 Yu-Ying Zhang , Thomas H Reiprich , Alexis Finoguenov , Daniel S. Hudson , Craig L Sarazin

The intensity of the soft X-Ray background is correlated with the distribution of galaxies. To demonstrate this, magnitude limited galaxy samples extracted from bright galaxy catalogues and the Lick counts are utilized. Significant…

The study of soft X-ray emission of 38 X-ray selected galaxy clusters observed by ROSAT PSPC indicates that the soft excess phenomenon may be a common occurrence in galaxy clusters. Excess soft X-ray radiation, above the contribution from…

Astrophysics · Physics 2015-06-24 M. Bonamente , R. Lieu , M. K. Joy , J. H. Nevalainen

We present a new treatment of two popular models for the growth of structure, examining the X-ray emission from hot gas with allowance for spectral line emission from various atomic species, primarily ``metals". The X-ray emission from the…

Astrophysics · Physics 2016-08-30 Renyue Cen , Hyesung Kang , Jeremiah P. Ostriker , Dongsu Ryu

Multi-wavelength analysis of the young massive cluster VVV CL077 is presented for the first time. Our Chandra survey of this region enabled the detection of three X-ray emitting stellar members of the cluster, as well as a possible diffuse…

High Energy Astrophysical Phenomena · Physics 2015-06-23 Arash Bodaghee , John A. Tomsick , Francesca Fornasini , Farid Rahoui , Franz E. Bauer

We explore the detectability of bulk motions in the X-ray emitting intracluster medium (ICM) using a catalog of 1,836 mock Astro-E2 observations of simulated clusters of galaxies. We generate high resolution mock spectra for two observing…

Astrophysics · Physics 2009-11-10 Andrew Pawl , August E. Evrard , Renato A. Dupke

Cosmological simulations predict that a large fraction of the baryonic mass of the Universe exists as 10^5-10^7 K diffuse, X-ray emitting gas, tracing low density filament and sheet-like structures exterior to massive clusters of galaxies.…

Astrophysics · Physics 2009-12-15 Caleb Scharf , Megan Donahue , G. Mark Voit , Piero Rosati , Marc Postman

We present herein a systematic X-ray analysis of blue galaxy-clusters at $z=0.84$ discovered by the Subaru telescope. The sample consisted of 43 clusters identified by combining red-sequence and blue-cloud surveys, covering a wide range of…

Cosmology and Nongalactic Astrophysics · Physics 2022-03-09 Rana Misato , Yoshiki Toba , Naomi Ota , Naoaki Yamamoto , Tadayuki Kodama , Nobuhiro Okabe , Masamune Oguri , Ikuyuki Mitsuishi

(abridged) We present a new determination of the local temperature function of X-ray clusters. We use a new sample comprising fifty clusters for which temperature information is now available, making it the largest complete sample of its…

Astrophysics · Physics 2007-05-23 A. Blanchard , R. Sadat , J. G. Bartlett , M. Le Dour

We present a high resolution spectrum of the diffuse X-ray background from 0.1 to 1 keV for a ~1 region of the sky centered at l=90, b=+60 using a 36-pixel array of microcalorimeters flown on a sounding rocket. With an energy resolution of…

Turbulent processes at work in the intracluster medium perturb this environment, displacing gas, and creating local density fluctuations that can be quantified via X-ray surface brightness fluctuation analyses. Improved knowledge of these…

Cosmology and Nongalactic Astrophysics · Physics 2023-05-18 Simon Dupourqué , Nicolas Clerc , Etienne Pointecouteau , Dominique Eckert , Stefano Ettori , Franco Vazza

We studied the spectral signature of different components of the Diffuse X-ray Background (DXB), including Local Hot Bubble (LHB), Solar Wind Charge Exchange (SWCX), Galactic Halo, and typically unresolved point sources (galaxies and AGN),…

High Energy Astrophysical Phenomena · Physics 2023-05-25 Sicong Huang , Nico Cappelluti , Massimiliano Galeazzi , Anjali Gupta , Wenhao Liu , Eugenio Ursino , Tomykkutty J. Velliyedathu