Name | 040422 |
Title | The central double-degenerate binary in the most oxygen poor PN G135.9+55.9 |
URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0404220101 |
DOI | https://doi.org/10.5270/esa-spppfqu |
Author | Dr Gagik Tovmasian |
Description | We propose to obtain short exposure of the PN G135.9+55.9, in particular of its binary central nucleus. It is remarkable, because it is the most oxygen-poor PN known, with an oxygen abundance of about 1/100 of the solar value. This PN is also one of the few where a close binary core has been detected. Our observations show that the period of the system is virgul4 h and that one of the components of the system is a post-AGB, pre-white dwarf hot star, the other is more massive compact object, most probably a neutron star. Photometry shows significant irradiation of elliptically distorted central star of the PN. We aim to confirm that it is the optical counterpart of the RASS source and to probe its spectral composition. |
Publication | No observations found associated with the current proposal |
Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2006-11-01T21:55:58Z/2006-11-02T05:27:58Z |
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 | 2007-11-28T00:00:00Z |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Dr Gagik Tovmasian, 2007, 040422, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-spppfqu |