A dataset provided by the European Space Agency

Name 040422
Title The central double-degenerate binary in the most oxygen poor PN G135.9+55.9


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, 2007-11-28T00:00:00Z, 040422, 17.56_20190403_1200. https://doi.org/10.5270/esa-spppfqu