1997A&A...328..571T


Query : 1997A&A...328..571T

1997A&A...328..571T - Astronomy and Astrophysics, volume 328, 571-578 (1997/12-2)

RX J0719.2+6557: a new eclipsing polar.

TOVMASSIAN G.H., GREINER J., ZICKGRAF F.-J., KROLL P., KRAUTTER J., THIERING I., ZHARYKOV S.V. and SERRANO A.

Abstract (from CDS):

A new magnetic cataclysmic variable is identified as the counterpart of the X-ray source RX J0719.2+6557 which has been discovered during the ROSAT all-sky survey. Optical spectroscopy of the ≃17mag object revealed a pattern of Balmer and strong He II emission lines which are characteristic for cataclysmic variables. The emission lines show radial velocity variations with a period of 98.2min with no significant phase shifts among them. This coincides with the period of deep eclipses (up to 4mag) in the photometric light curve of the system. The phase of the eclipse relative to the spectroscopic phase, and its structure indicates that the dominant source of emission is located on the stream of accreting matter, which is eclipsed by the secondary companion. The emission lines bear evidence of a weaker component, most probably the contribution from the heated side of the secondary star. These features define this object as a probable polar in a high state in which the secondary is irradiated by the X-rays originating from magnetically driven accretion onto the white dwarf.

Abstract Copyright:

Journal keyword(s): stars: cataclysmic variables - accretion - stars: individual: RX J0719.2+6557 (1RXS J071913.4+655734) - binaries: eclipsing - X-rays: stars

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 V* HS Cam CV* 07 19 14.5154497992 +65 57 44.306885988   19.01       ~ 24 0
2 Feige 34 HS* 10 39 36.7358839104 +43 06 09.212615280 9.613 10.91 11.14 11.319 11.464 sdOp 637 0
3 HZ 44 HS* 13 23 35.2629445608 +36 07 59.544140304 10.186 11.42 11.65 12.00 11.995 sdBN0VIIHe28 392 0

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2022.05.20-19:52:26

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