| Name | 015262 |
| Title | High-Resolution Spectroscopy of the O-Ne-Rich Ultracompact Binary 4U 1626-67 |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0152620101 |
| DOI | https://doi.org/10.5270/esa-qetserr |
| Author | Prof Deepto Chakrabarty |
| Description | Chandra-HETGS spectroscopy of 4U 1626-67 detects Doppler pairs of broad Keplerian Ne-O lines, and Ne-O absorption edges much stronger than ISM values. Based on the inferred local Ne-O ratio, the mass donor is likely the low-mass core of a crystallized C-O or O-Ne-Mg white dwarf, and may be the prototype for an emerging class of ultracompact binaries with exotic donors. We propose an 80 ks XMM observation with 3 principal goals: (1) to establish the donor composition by measuring the edges of Ne,O,Mg,and C; (2) to study the accretion flow structure through Doppler tomography using the H-like lines; (3) to study disk warping by correlating line strengths with the known UV variability of the source. The 20 ks XMM GTO observation will not meet any of these goals. |
| Publication | No observations found associated with the current proposal |
| Instrument | EPN, RGS1, OM, RGS2, EMOS1, EMOS2 |
| Temporal Coverage | 2003-08-20T05:55:48Z/2003-08-21T05:14:56Z |
| Version | 17.56_20190403_1200 |
| 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 | 2004-09-30T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2004-09-30T00:00:00Z, 015262, 17.56_20190403_1200. https://doi.org/10.5270/esa-qetserr |