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The origin of the Galactic center diffuse X-ray emission investigated by near-infrared imaging and polarimetric observations

  • Shogo Nishiyama (a1), Kazuki Yasui (a2), Tetsuya Nagata (a2), Tatsuhito Yoshikawa (a2), Hideki Uchiyama (a3) and Motohide Tamura (a1)...

Abstract

The origin of the Galactic center diffuse X-ray emission (GCDX) is still under intense investigation. We have found a clear excess in a longitudinal GCDX profile over a stellar number density profile in the nuclear bulge region, suggesting a significant contribution of diffuse, interstellar hot plasma to the GCDX. We have estimated that contributions of an old stellar population to the GCDX are ∼50% and ∼20% in the nuclear stellar disk and nuclear star cluster, respectively. Our near-infrared polarimetric observations show that the GCDX region is permeated by a large scale, toroidal magnetic field. Together with observed magnetic field strengths in nearly energy equipartition, the interstellar hot plasma could be confined by the toroidal magnetic field.

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References

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Belmont, R., et al. 2005, ApJ 631, L53
Davies, B., et al. 2009, ApJ 694, 46
González-Fernández, C., et al. 2008, A&A 479, 131
Koyama, K., et al. 1989, PASJ 59, 245
Koyama, K., et al. 2007, Nature 339, 603
Makishima, K., 2006, ASCA Observations of Galaxies. In Makino, F. and Ohashi, T. (Eds.), New Horizon of X-Ray Astronomy. First Results from ASCA, pp. 171.
Muno, M. P., et al. 2004, ApJ 613, 326
Najarro, F., et al. 2009, ApJ 691, 1816
Nishiyama, S., et al. 2006, ApJ 638, 839
Nishiyama, S., et al. 2009, ApJ 690, 1648
Nishiyama, S., et al. 2010, ApJ, 722, L23
Nishiyama, S., et al. 2013, ApJ 769, L28
Revnivtsev, M., et al. 2009, Nature 458, 1142
Uchiyama, H., et al. 2011, PASJ 63, 903
Uchiyama, H., et al. 2013, PASJ 65, 19
Yamauchi, S., et al. 2009, PASJ 61, 225
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