Name | 006074 |
Title | X-Raying the Stream/Disk Impact Region in XB1254-69 |
URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0060740101 |
DOI | https://doi.org/10.5270/esa-l5pru2k |
Author | Dr Duane Liedahl |
Description | 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 or comprise the denser component of a two-phase medium at smaller radii, in XB1254 they are most likely moderately ionized. Using the neutron star as a backlighter, we can infer the physical state of the absorber by measuring edge positions and depths, and, if the post-impact stream is turbulent, absorption lines. We have developed sophisticated non-LTE opacity models of 65 ions, with the expectation that these observations will constrain rad/hydro models of the. |
Publication | No observations found associated with the current proposal |
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 Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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 |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Dr Duane Liedahl, 2003, 006074, PPS_NOT_AVAILABLE, European Space Agency, https://doi.org/10.5270/esa-l5pru2k |