期刊
ASTROPHYSICAL JOURNAL
卷 779, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/779/1/14
关键词
black hole physics; galaxies: individual (M86); galaxies: interactions; X-rays: individual (XRT 000519)
资金
- Alfred P. Sloan Foundation
- National Science Foundation
- U.S. Department of Energy Office of Science
- SDSS-III Collaboration
- University of Arizona
- Brazilian Participation Group
- Brookhaven National Laboratory
- University of Cambridge
- Carnegie Mellon University
- University of Florida
- French Participation Group
- German Participation Group
- Harvard University
- Instituto de Astrofisica de Canarias
- Michigan State/Notre Dame/JINA Participation Group
- Johns Hopkins University
- Lawrence Berkeley National Laboratory
- Max Planck Institute for Astrophysics
- Max Planck Institute for Extraterrestrial Physics
- New Mexico State University
- New York University
- Ohio State University
- Pennsylvania State University
- University of Portsmouth
- Princeton University
- Spanish Participation Group
- University of Tokyo
- University of Utah
- Vanderbilt University
- University of Virginia
- University of Washington
- Yale University
- Science and Technology Facilities Council [ST/L001381/1, ST/J001600/1] Funding Source: researchfish
- STFC [ST/L001381/1, ST/J001600/1] Funding Source: UKRI
We present the discovery of a new type of explosive X-ray flash in Chandra images of the old elliptical galaxy M86. This unique event is characterized by the peak luminosity of 6 x 10(42) erg s(-1) for the distance of M86, the presence of precursor events, the timescale between the precursors and the main event (similar to 4000 s), the absence of detectable hard X-ray and gamma-ray emission, the total duration of the event, and the detection of a faint associated optical signal. The transient is located close to M86 in the Virgo cluster at the location where gas and stars are seen protruding from the galaxy probably due to an ongoing wet minor merger. We discuss the possible mechanisms for the transient and conclude that the X-ray flash could have been caused by the disruption of a compact white dwarf star by a similar to 10(4) M-circle dot black hole. Alternative scenarios such that of a foreground neutron star accreting an asteroid or the detection of an off-axis (short) gamma-ray burst cannot be excluded at present.
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