Proposal ID | 011246 |
Title | Black hole soft X-ray transients in quiescence SSC_11 |
Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0112460101 |
DOI | https://doi.org/10.5270/esa-zm9ri10 |
Principal Investigator, PI | Dr Michael Watson |
Abstract | GT-The defining property of a black hole is its event horizon through whichmatter and energy can rain in, but from which nothing can escape. Proof ofthe existence of event horizons is a foremost goal of astrophysics. However,the goal is an extraordinary challenge since no photon can reach us from thehorizon. We propose to establish the reality of event horizons bycomparing in quiescent X-ray novae the behaviour of accreting black holes tothe behaviour of accreting neutron stars. A by-product of this study will bea handle on the processes that transport angular momentum in accretion discs.Guided by earlier work and a new paradigm for accretion - the ADAFmodel - we propose to observe A0620-00 and GRO J1655-40. |
Publications |
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Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2001-08-29T23:34:13Z/2002-03-19T02:27:30Z |
Version | 17.56_20190403_1200 |
Mission Description | The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis. |
Creator Contact | https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk |
Date Published | 2004-09-17T00:00:00Z |
Keywords | "quiescent xray novae", "accreting neutron stars", "adaf model", "a0620 00", "transport angular momentum", "accreting blackhole", "event horizon", "quiescence ssc_11", "accretion discs", "event horizons", "defining property", "gro j1655" |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Dr Michael Watson, 2004, 'Black hole soft X-ray transients in quiescence SSC_11', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-zm9ri10 |