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Title: A NuSTAR observation of the center of the Coma Cluster

Journal Article · · The Astrophysical Journal (Online)
 [1];  [2];  [3];  [4];  [4];  [5];  [4];  [6];  [4];  [7];  [8];  [9];  [8];  [8];  [8];  [10]
  1. IASF-Milano, INAF, Milan (Italy); Univ. of California, Irvine, CA (United States)
  2. NASA/Goddard Space Flight Center, Greenbelt, MD (United States); Johns Hopkins Univ., Baltimore, MD (United States)
  3. IASF-Milano, INAF, Milan (Italy)
  4. Technical Univ. of Denmark, Lyngby (Denmark)
  5. SLAC National Accelerator Lab., Menlo Park, CA (United States)
  6. Univ. of California, Berkeley, CA (United States)
  7. Univ. of California, Berkeley, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  8. California Inst. of Technology (CalTech), Pasadena, CA (United States)
  9. Columbia Univ., New York, NY (United States)
  10. NASA/Goddard Space Flight Center, Greenbelt, MD (United States)

We present the results of a 55 ks NuSTAR observation of the core of the Coma Cluster. The global spectrum can be explained by thermal gas emission, with a conservative 90% upper limit to non-thermal inverse Compton (IC) emission of 5.1 × 10–12 erg cm–2 s–1 in a 12' × 12' field of view. The brightness of the thermal component in this central region does not allow more stringent upper limits on the IC component when compared with non-imaging instruments with much larger fields of view where claims of detections have been made. Future mosaic NuSTAR observations of Coma will further address this issue. In addition, the temperature map shows a relatively uniform temperature distribution with a gradient from the hot northwest side to the cooler southeast, in agreement with previous measurements. The temperature determination is robust given the flat effective area and low background in the 3-20 keV band, making NuSTAR an ideal instrument to measure high temperatures in the intracluster medium.

Research Organization:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1313950
Report Number(s):
SLAC-PUB-16792; arXiv:1411.1573
Journal Information:
The Astrophysical Journal (Online), Vol. 800, Issue 2; ISSN 1538-4357
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 17 works
Citation information provided by
Web of Science

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Cited By (7)

Probing the low-energy spectrum of non-thermal electrons in galaxy clusters with soft gamma ray observations journal March 2019
Diffuse Radio Emission from Galaxy Clusters journal February 2019
Deep observation of the NGC 1275 region with MAGIC: search of diffuse γ -ray emission from cosmic rays in the Perseus cluster journal April 2016
A $\mathcal {M}\gtrsim 3$ shock in ‘El Gordo’ cluster and the origin of the radio relic journal August 2016
Deep observation of the NGC 1275 region with MAGIC: search of diffuse $\gamma$-ray emission from cosmic rays in the Perseus cluster text January 2016
Deep observation of the NGC 1275 region with MAGIC: search of diffuse gamma-ray emission from cosmic rays in the Perseus cluster text January 2016
A $\mathcal{M}\gtrsim3$ shock in `El Gordo' cluster and the origin of the radio relic text January 2016

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