dc.contributor.author | Mori, Kaya | |
dc.contributor.author | Hailey, Charles J. | |
dc.contributor.author | Krivonos, Roman | |
dc.contributor.author | Hong, Jaesub | |
dc.contributor.author | Ponti, Gabriele | |
dc.contributor.author | Bauer, Franz | |
dc.contributor.author | Perez, Kerstin | |
dc.contributor.author | Nynka, Melania | |
dc.contributor.author | Zhang, Shuo | |
dc.contributor.author | Tomsick, John A. | |
dc.contributor.author | Alexander, David M. | |
dc.contributor.author | Baganoff, Frederick K. | |
dc.contributor.author | Barret, Didier | |
dc.contributor.author | Barrière, Nicolas | |
dc.contributor.author | Boggs, Steven E. | |
dc.contributor.author | Canipe, Alicia M. | |
dc.contributor.author | Christensen, Finn E. | |
dc.contributor.author | Craig, William W. | |
dc.contributor.author | Forster, Karl | |
dc.contributor.author | Giommi, Paolo | |
dc.contributor.author | Grefenstette, Brian W. | |
dc.contributor.author | Grindlay, Jonathan E. | |
dc.contributor.author | Harrison, Fiona A. | |
dc.contributor.author | Hornstrup, Allan | |
dc.contributor.author | Kitaguchi, Takao | |
dc.contributor.author | Koglin, Jason E. | |
dc.contributor.author | Luu, Vy | |
dc.contributor.author | Madsen, Kristen K. | |
dc.contributor.author | Mao, Peter H. | |
dc.contributor.author | Miyasaka, Hiromasa | |
dc.contributor.author | Perri, Matteo | |
dc.contributor.author | Pivovaroff, Michael J. | |
dc.contributor.author | Puccetti, Simonetta | |
dc.contributor.author | Rana, Vikram | |
dc.contributor.author | Stern, Daniel | |
dc.contributor.author | Westergaard, Niels J. | |
dc.contributor.author | Zhang, William W. | |
dc.contributor.author | Zoglauer, Andreas | |
dc.date.accessioned | 2017-01-30T19:29:20Z | |
dc.date.issued | 2015 | |
dc.identifier.citation | Mori, Kaya, Charles J. Hailey, Roman Krivonos, Jaesub Hong, Gabriele Ponti, Franz Bauer, Kerstin Perez, et al. 2015. NuSTAR Hard X-ray Survey of the Galactic Center Region I: Hard X-ray Morphology and Spectroscopy of the Diffuse Emission. The Astrophysical Journal 814 (2) (November 19): 94. doi:10.1088/0004-637x/814/2/94. | en_US |
dc.identifier.issn | 1538-4357 | en_US |
dc.identifier.uri | http://nrs.harvard.edu/urn-3:HUL.InstRepos:30168286 | |
dc.description.abstract | We present the first sub-arcminute images of the Galactic Center above 10 keV, obtained with NuSTAR. NuSTAR resolves the hard X-ray source IGR J17456–2901 into non-thermal X-ray filaments, molecular clouds, point sources, and a previously unknown central component of hard X-ray emission (CHXE). NuSTAR detects four non-thermal X-ray filaments, extending the detection of their power-law spectra with Γ ~ 1.3–2.3 up to ~50 keV. A morphological and spectral study of the filaments suggests that their origin may be heterogeneous, where previous studies suggested a common origin in young pulsar wind nebulae (PWNe). NuSTAR detects non-thermal X-ray continuum emission spatially correlated with the 6.4 keV Fe Kα fluorescence line emission associated with two Sgr A molecular clouds: MC1 and the Bridge. Broadband X-ray spectral analysis with a Monte-Carlo based X-ray reflection model self-consistently determined their intrinsic column density (~1023 cm−2), primary X-ray spectra (power-laws with Γ ~ 2) and set a lower limit of the X-ray luminosity of Sgr A* flare illuminating the Sgr A clouds to LX gsim 1038 erg s−1. Above ~20 keV, hard X-ray emission in the central 10 pc region around Sgr A* consists of the candidate PWN G359.95–0.04 and the CHXE, possibly resulting from an unresolved population of massive CVs with white dwarf masses MWD ~ 0.9 M⊙. Spectral energy distribution analysis suggests that G359.95–0.04 is likely the hard X-ray counterpart of the ultra-high gamma-ray source HESS J1745–290, strongly favoring a leptonic origin of the GC TeV emission. | en_US |
dc.description.sponsorship | Astronomy | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | IOP Publishing | en_US |
dc.relation.isversionof | doi:10.1088/0004-637X/814/2/94 | en_US |
dc.relation.hasversion | https://arxiv.org/abs/1510.04631 | en_US |
dash.license | OAP | |
dc.subject | Galaxy: center | en_US |
dc.subject | radiation mechanisms: non-thermal | en_US |
dc.subject | X-rays: general | en_US |
dc.subject | X-rays: ISM | en_US |
dc.title | NuSTAR Hard X-ray Survey of the Galactic Center Region I: Hard X-ray Morphology and Spectroscopy of the Diffuse Emission | en_US |
dc.type | Journal Article | en_US |
dc.description.version | Accepted Manuscript | en_US |
dc.relation.journal | The Astrophysical Journal | en_US |
dash.depositing.author | Grindlay, Jonathan E. | |
dc.date.available | 2017-01-30T19:29:20Z | |
dc.identifier.doi | 10.1088/0004-637X/814/2/94 | * |
dash.authorsordered | false | |
dash.contributor.affiliated | Hong, Jaesub | |
dash.contributor.affiliated | Grindlay, Jonathan | |