2001A&A...374.1003B


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.22CEST06:48:11

2001A&A...374.1003B - Astronomy and Astrophysics, volume 374, 1003-1008 (2001/8-2)

The white dwarf revealed in the intermediate polar V709 Cassiopeiae.

BONNET-BIDAUD J.M., MOUCHET M., DE MARTINO D., MATT G. and MOTCH C.

Abstract (from CDS):

Result. are presented from the first detailed spectroscopic observations of the recently identified intermediate polar RXJ0028.8+5917/V709 Cas. The study of the emission line radial velocities allows us to remove the uncertainties on the different aliases of the orbital period and a best value is found at (0.2225±0.0002)day. It is also found that the system shows significant EW~(2-4)Å broad absorptions affecting the Balmer lines from Hδ to Hβ. These broad absorptions are interpreted as the contribution of an underlying white dwarf atmosphere. The characteristics of the absorptions are found to be consistent with a DA logg=8 white dwarf at a temperature of ∼23000K, contributing ∼17% (at 4500Å) to the overall flux. This is the first direct detection of a white dwarf in an intermediate polar system. The absence of significant Zeeman splitting indicates a magnetic field lower than 10MG, confirming that, at least in some cases, intermediate polars have weaker fields than polars. Different possibilities are discussed to explain the substantial contribution of the white dwarf to the overall flux.

Abstract Copyright:

Journal keyword(s): stars: white dwarfs - stars: novae, cataclysmic variables - stars: magnetic fields - X-rays stars: individual: V709 Cas

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 4U 0027+59 X 00 28 10 +59 09.2           ~ 15 0
2 V* V709 Cas DQ* 00 28 48.8268573576 +59 17 22.032796584           ~ 113 0
3 V* GK Per No* 03 31 12.0096626899 +43 54 15.467450081   10.2 14.0     K1IV 870 0
4 V* OY Car DN* 10 06 22.0792108747 -70 14 04.582997921           ~ 549 0
5 V* GW Lib DN* 15 19 55.3336459070 -25 00 24.613958659   9.0       ~ 181 0
6 V* AE Aqr DQ* 20 40 09.1598509019 -00 52 15.057042857   12.46 10.40   10.191 K3-5IV/V 611 0
7 BD+28 4211 HS* 21 51 11.0220905905 +28 51 50.366090892 8.922 10.25 10.58 10.656 10.831 sdO2VIIIHe5 739 0
8 Feige 110 HS* 23 19 58.3995050606 -05 09 56.170282845 10.360 11.45 11.50 11.970 12.145 sdO8VIIIHe5 560 1

    Equat.    Gal    SGal    Ecl

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2020.10.22-06:48:11

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