2002A&A...382..984E


Query : 2002A&A...382..984E

2002A&A...382..984E - Astronomy and Astrophysics, volume 382984-998 (2002/2-2)

Multi-wavelength spectrophotometry of EX Hydrae.

EISENBART S., BEUERMANN K., REINSCH K. and GAENSICKE B.T.

Abstract (from CDS):

We present phase-resolved infrared and optical spectrophotometry of the intermediate polar EX Hya supplemented by archival ultraviolet data. The spin-modulated emission from the accretion funnel and the emission from the accretion disk or ring contain substantial optically thin components. The white dwarf dominates the unmodulated flux in the ultraviolet and is identified by numerous absorption lines. Metal absorption in the accretion curtain may add to the observed spectral features. The secondary star is of spectral type M4±1 and is detected by its ellipsoidal modulation. We derive a distance of 65±11pc which makes EX Hydrae one of the closest cataclysmic variables with a known distance. The luminosity derived from the integrated overall spectral energy distribution is 3x1032erg/s. The accretion rate of 3x1015g/s (for an 0.6M☉ white dwarf) is in reasonable agreement with the rates expected from angular momentum loss by gravitational radiation and from the observed spin-up of the white dwarf.

Abstract Copyright: ∼

Journal keyword(s): stars: individual: EX Hydrae - cataclysmic variables - accretion

Simbad objects: 14

goto Full paper

goto View the references in ADS

Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 V* UZ For CV* 03 35 28.6518733656 -25 44 21.768755424           M4.5 279 0
2 V* YZ CMi PM* 07 44 40.1723046464 +03 33 08.875227574 13.761 12.831 11.225 9.958 8.263 M4.0Ve 957 0
3 V* SU UMa CV* 08 12 28.2695986944 +62 36 22.427676396           B2 516 0
4 V* OY Car CV* 10 06 22.0793274312 -70 14 04.584660540           ~ 586 0
5 BD-03 2870 PM* 10 12 17.6682499584 -03 44 44.392042932 11.941 10.757 9.264 8.258 7.066 M2V 283 1
6 Wolf 358 BY* 10 50 52.0312380389 +06 48 29.259617410 14.532 13.319 11.675 10.459 8.889 M4V 298 0
7 V* AR UMa CV* 11 15 44.5891034908 +42 58 22.431026739     16.4     O9I 154 0
8 LP 733-71 PM* 11 46 42.9131118835 -14 00 51.785571654 14.331 13.19 11.700 10.639 9.287 M3V 101 0
9 Wolf 424 ** 12 33 17.361480 +09 01 15.79224 15.398 14.313 12.467 10.937 8.988 M5.5V 329 0
10 V* EX Hya CV* 12 52 24.2222471899 -29 14 55.999766523   13.505 13.491 13.549   M5-6V 730 0
11 HD 111981 * 12 53 25.2255828624 -29 19 06.322607400   10.56 9.22     K1/2III 6 0
12 V* EK TrA CV* 15 14 01.3761801610 -65 05 32.305864520           ~ 128 0
13 V* AM Her CV* 18 16 13.2546725104 +49 52 04.759613537   15.124 14.808 13.525   M4.5-5Ve 1009 2
14 V* IP Peg CV* 23 23 08.5362249504 +18 24 59.206884012           M2 395 0

To bookmark this query, right click on this link: simbad:objects in 2002A&A...382..984E and select 'bookmark this link' or equivalent in the popup menu