A dataset provided by the European Space Agency

Name 084435
Title Revisiting the Hyades (DA2+dK2) Eclipsing Binary V471 Tauri with XMM-Newton
URL

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0844350101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0844350201
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0844350301

DOI https://doi.org/10.5270/esa-na2jcyz
Author Prof Edward Guinan
Description We request 60 ks to secure XMM EPIC-OM-UV observations of the Hyades (DAZ+K2V) 12.5-hr eclipsing binary V471 Tau. V471 Tau is an astrophysical lab for testing theories of binary star evolution, stellar physics as well as hosting a probable brown dwarf. We propose to capitalize on unique XMM.s X-ray-UV capabilities to secure simultaneous X-ray UV observations. These are crucial for characterizing the 9.25-min X-ray UV flux modulations seen previously. The X-UV variations are theorized to arise from wind accretion on the WDs displaced magnetic poles relative to its rotation poles. The WDs rotation period also serves as an independent clock to search for the Light Travel Time Effect from the movement of EB s barycenter by a brown dwarf. A 15.6-yr X-ray cycle will also be studied.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2019-09-04T13:00:41Z/2019-09-05T16:01:04Z
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 2020-12-20T23:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2020-12-20T23:00:00Z, 084435, 17.56_20190403_1200. https://doi.org/10.5270/esa-na2jcyz