A dataset provided by the European Space Agency

Name 084509
Title A possible cessation of mass-transfer in previously active cataclysmic variable
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0845090101

DOI https://doi.org/10.5270/esa-ys7mc3j
Author Dr Vitaly Neustroev
Description Cataclysmic variables (CVs) evolve from longer to shorter orbital periods until
a minimum period P_min is reached. Approaching the short period end of the CV
orbital period distribution, the mass-transfer rate is decreasing but never
vanishes. However, the previously active dwarf nova HO Cet, which orbital period
P_orb is very close to P_min, displays excellent evidence for extremely low
mass-transfer rate, much lower than in all previously known CVs. Is the
mass-transfer in HO Cet terminated completely or its rate is very low but the
donor star is still transferring matter?. In this proposal we aim to find
evidence for still ongoing accretion in HO Cet through the detection of the
object in X-rays. The cessation of mass-transfer is not consistent with prior theory and observations.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2019-07-15T14:07:44Z/2019-07-15T16:21:04Z
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 2020-08-14T22:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Vitaly Neustroev, 2020, 084509, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ys7mc3j