| Proposal ID | 040506 |
| Title | Is there a black hole in WR148? |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0405060201 |
| DOI | https://doi.org/10.5270/esa-f4wp3i5 |
| Principal Investigator, PI | Dr Erik Kuulkers |
| Abstract | Among Wolf-Rayet (WR) stars, WR148 (HD 197406) appears to be very unusual: it isan extreme runaway, single-line spectroscopic binary in which the companionstrongly ionizes the dense WR wind. It has been suggested that WR148 harbors acompact companion, most likely a black hole (BH). Using XMM-Newton we willdetermine the nature of the companion: we will search for hard X-rays (typicallylarger than ~6 keV) as the signature of a BH in WR148. We will also identify thesoft X-ray (less than ~2.5 keV) emission previously detected from this source. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2006-07-10T06:02:45Z/2006-07-12T14:46:10Z |
| 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 | 2007-08-09T00:00:00Z |
| Last Update | 2025-08-04 |
| Keywords | "XMM", "hard xray", "XMM-Newton", "wr148 harbors", "compact companion", "blackhole bh", "HD 197406", "kev emission", "xmm newton", "wr148 ?.", "soft xray", "dense wr wind", "typically larger" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Erik Kuulkers, 2007, 'Is there a black hole in WR148?', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-f4wp3i5 |