A dataset provided by the European Space Agency

Name 086215
Title The ultra-compact sdOB+WD binary ZTF J213056.71+442046.5
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0862150101

DOI https://doi.org/10.5270/esa-[xxxxxxx]
Author Dr SANDRO MEREGHETTI
Description Very recently, it has been discovered that ZTF J213056.71+442046.5 is a binary system composed of a white dwarf orbiting a hot subdwarf star in only 39 min. This is the shortest orbital period of any sdOB+WD binary. The orbital separation implies that the subdwarf fills its Roche-lobe, making this system an optimal candidate for observations at X-ray energies. The likely presence of X-ray emission is further strengthened by the finding that the periodic modulation of the optical light curve can be explained only invoking the presence of an accretion disk around the white dwarf, which occults the subdwarf mass donor star. X-ray observations can give important information on the mass transfer rate, on the properties of the WD and on the evolution of this unique binary.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2021-01-05T23:01:46Z/2021-01-06T18:53:26Z
Version 18.02_20200221_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 2022-01-31T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2022-01-31T00:00:00Z, 086215, 18.02_20200221_1200. https://doi.org/10.5270/esa-[xxxxxxx]