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DEEP CHANDRA OBSERVATIONS OF THE COMPACT STARBURST GALAXY HENIZE 2-10: X-RAYS FROM THE MASSIVE BLACK HOLE

Author(s): Reines, Amy E; Reynolds, Mark T; Miller, Jon M; Sivakoff, Gregory R; Greene, Jenny E.; et al

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dc.contributor.authorReines, Amy E-
dc.contributor.authorReynolds, Mark T-
dc.contributor.authorMiller, Jon M-
dc.contributor.authorSivakoff, Gregory R-
dc.contributor.authorGreene, Jenny E.-
dc.contributor.authorHickox, Ryan C-
dc.contributor.authorJohnson, Kelsey E-
dc.date.accessioned2019-10-09T19:32:54Z-
dc.date.available2019-10-09T19:32:54Z-
dc.date.issued2016-10-20en_US
dc.identifier.citationReines, Amy E, Reynolds, Mark T, Miller, Jon M, Sivakoff, Gregory R, Greene, Jenny E, Hickox, Ryan C, Johnson, Kelsey E. (2016). DEEP CHANDRA OBSERVATIONS OF THE COMPACT STARBURST GALAXY HENIZE 2-10: X-RAYS FROM THE MASSIVE BLACK HOLE. ASTROPHYSICAL JOURNAL LETTERS, 830 (10.3847/2041-8205/830/2/L35en_US
dc.identifier.issn2041-8205-
dc.identifier.urihttp://arks.princeton.edu/ark:/88435/pr1px6b-
dc.description.abstractWe present follow-up X-ray observations of the candidate massive black hole (BH) in the nucleus of the low-mass, compact starburst galaxy Henize 2-10. Using new high-resolution observations from the Chandra X-ray Observatory totaling 200. ks in duration, as well as archival Chandra observations from 2001, we demonstrate the presence of a previously unidentified X-ray point source that is spatially coincident with the known nuclear radio source in Henize 2-10 (i. e., the massive BH). We show that the hard X-ray emission previously identified in the 2001 observation is dominated by a source that is distinct from the nucleus, with the properties expected for a highmass X-ray binary. The X-ray luminosity of the nuclear source suggests the massive BH is radiating significantly below its Eddington limit (similar to 10-6 L-Edd), and the soft spectrum resembles other weakly accreting massive BHs including Sagittarius A*. Analysis of the X-ray light curve of the nucleus reveals the tentative detection of a similar to 9 hr periodicity, although additional observations are required to confirm this result. Our study highlights the need for sensitive high-resolution X-ray observations to probe low-level accretion, which is the dominant mode of BH activity throughout the universe.en_US
dc.language.isoen_USen_US
dc.relationhttps://ui.adsabs.harvard.edu/abs/2016ApJ...830L..35R/abstracten_US
dc.relation.ispartofASTROPHYSICAL JOURNAL LETTERSen_US
dc.rightsFinal published version. Article is made available in OAR by the publisher's permission or policy.en_US
dc.titleDEEP CHANDRA OBSERVATIONS OF THE COMPACT STARBURST GALAXY HENIZE 2-10: X-RAYS FROM THE MASSIVE BLACK HOLEen_US
dc.typeJournal Articleen_US
dc.identifier.doidoi:10.3847/2041-8205/830/2/L35-
dc.date.eissued2016-10-20en_US
dc.identifier.eissn2041-8213-
pu.type.symplectichttp://www.symplectic.co.uk/publications/atom-terms/1.0/journal-articleen_US

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