A dataset provided by the European Space Agency

Name 065123
Title The buddies of Babcock.s star - X-ray emission from extreme magnetic ApBp stars?
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0651230101
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0651230201
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0651230301

DOI 10.5270/esa-i3il18l
Author Dr Jan Robrade
Description We propose XMM-Newton observations of two extreme magnetic Ap-Bp stars, HD 75049 and HD 137509, that exhibit surface field strengths of about 30 kG. HD 75049 is an Ap star and its extraordinary large magnetic field is dominated by a strong dipole component. The B9p star HD 137509 exhibits a similar surface field strength, but the underlying magnetic structure has a far more complex field geometry. Our targets have magnetic fields that rival famous Babcock.s star that was recently established as a bright X-ray source. X-ray emission from intermediate mass stars is thought to originate from magnetically confined wind-shocks and the aim of this proposal is to test, whether HD 75049 and HD 137509 emit X-rays and if so, to determine their basic X-ray properties.
Publication Serendipitous UV source catalogues for 10 years of XMM and 5 years of Swift . Yershov, V. N., . Ap&SS . 354-97 . 2014 . 2014Ap&SS.354...97Y ,
X-rays from magnetic intermediate mass Ap-Bp stars . Robrade, Jan, . AdSpR . 58-727 . 2016 . 2016AdSpR..58..727R ,
The Million Optical - Radio-X-ray Associations (MORX) Catalogue . Flesch, Eric W., . PASA . 33-52 . 2016 . 2016PASA...33...52F ,
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2010-10-04T22:17:26Z/2010-11-28T01:53:42Z
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 2011-12-22T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2011-12-22T00:00:00Z, 065123, 17.56_20190403_1200. https://doi.org/10.5270/esa-i3il18l