A dataset provided by the European Space Agency

Proposal ID 006074
Title X-Raying the Stream/Disk Impact Region in XB1254-69
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DOI https://doi.org/10.5270/esa-l5pru2k
Principal Investigator, PI Dr Duane Liedahl
Abstract X-ray spectroscopy of LMXB dippers offers the potential to isolate the physics of the collision of the accretion stream with the disk edge, which bears on several aspects of disk accretion. We propose to observe XB1254-69 for three binary orbits (42 ksec). Whether the absorbers are confined to the disk edge orcomprise the denser component of a two-phase medium at smaller radii, in XB1254they are most likely moderately ionized. Using the neutron star as abacklighter, we can infer the physical state of the absorber by measuring edgepositions and depths, and, if the post-impact stream is turbulent, absorptionlines. We have developed sophisticated non-LTE opacity models of 65 ions, withthe expectation that these observations will constrain rad/hydro models of the.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2001-01-22T00:27:12Z/2002-02-08T01:09:49Z
Version PPS_NOT_AVAILABLE
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 2003-02-23T00:00:00Z
Keywords "lte opacity models", "post impact stream", "neutron star", "hydro models", "absorption lines", "disk edge", "moderately ionized", "binary orbits", "edge positions", "x raying", "denser component", "accretion stream", "phase medium", "disk impact region", "disk accretion", "lmxb dippers", "constrain rad", "xray spectroscopy", "developed sophisticated"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Duane Liedahl, 2003, 'X-Raying the Stream/Disk Impact Region in XB1254-69', PPS_NOT_AVAILABLE, European Space Agency, https://doi.org/10.5270/esa-l5pru2k