2005A&A...443..995A


C.D.S. - SIMBAD4 rel 1.7 - 2021.03.08CET02:18:22

2005A&A...443..995A - Astronomy and Astrophysics, volume 443, 995-1005 (2005/12-1)

HS 0139+0559, HS 0229+8016, HS 0506+7725, and HS 0642+5049: four new long-period cataclysmic variables.

AUNGWEROJWIT A., GAENSICKE B.T., RODRIGUEZ-GIL P., HAGEN H.-J., HARLAFTIS E.T., PAPADIMITRIOU C., LEHTO H., ARAUJO-BETANCOR S., HEBER U., FRIED R.E., ENGELS D. and KATAJAINEN S.

Abstract (from CDS):

We present time-resolved optical spectroscopy and photometry of four relatively bright (V∼14.0-15.5) long-period cataclysmic variables (CVs) discovered in the Hamburg Quasar Survey: HS0139+0559, HS0229+8016, HS0506+7725, and HS0642+5049. Their respective orbital periods, 243.69±0.49min, 232.550±0.049min, 212.7±0.2min, and 225.90±0.23min are determined from radial velocity and photometric variability studies. HS0506+7725 is characterised by strong Balmer and He emission lines, short-period (∼10-20min) flickering, and weak X-ray emission in the ROSAT All Sky Survey. The detection of a deep low state (B≃18.5) identifies HS0506+7725 as a member of the VYScl stars. HS0139+0559, HS0229+8016, and HS0642+5049 display thick-disc like spectra and no or only weak flickering activity. HS0139+0559 and HS0229+8016 exhibit clean quasi-sinusoidal radial velocity variations of their emission lines but no or very little orbital photometric variability. In contrast, we detect no radial velocity variation in HS0642+5049 but a noticeable orbital brightness variation. We identify all three systems either as UX UMa-type novalike variables or as Z Cam-type dwarf novae. Our identification of these four new systems underlines that the currently known sample of CVs is rather incomplete even for bright objects. The four new systems add to the clustering of orbital periods in the 3-4h range found in the sample of HQS selected CVs, and we discuss the large incidence of magnetic CVs and VY Scl/SW Sex stars found in this period range among the known population of CVs.

Abstract Copyright:

Journal keyword(s): stars: binaries: close - stars: individual: HS0139+0559 - stars: individual: HS0229+8016 - stars: dwarf novae - stars: individual: HS0506+7725 - stars: individual: HS0642+5049 - stars: novae, variables cataclysmic

Simbad objects: 22

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Number of rows : 22

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 HS 0139+0559 NL* 01 41 39.9218208682 +06 14 37.495344987   14.9 15.4     ~ 12 0
2 HS 0229+8016 CV* 02 35 58.2098796678 +80 29 44.284972887   13.9 13.9     ~ 10 0
3 USNO-A2.0 1650-00512682 * 02 36 13.8528876681 +80 30 06.135346533   13.5 13.1     ~ 1 0
4 2MASS J05132139+7729065 * 05 13 21.3721103303 +77 29 06.507967325   14.2 13.6     ~ 1 0
5 HS 0506+7725 CV* 05 13 36.5689890507 +77 28 42.782067452   15.3 15.4     ~ 5 0
6 2E 0506.1+7725 X 05 13 37.4 +77 28 44           ~ 2 0
7 V* MU Cam XB* 06 25 16.2520524762 +73 34 39.104874988       14.3   ~ 61 0
8 HS 0642+5049 CV* 06 46 19.6075225843 +50 45 49.209645333   16.6 16.8     ~ 6 0
9 2MASS J06462006+5043273 * 06 46 20.0709157413 +50 43 27.274517373   13.3 12.9     ~ 1 0
10 V* DW Cnc CV* 07 58 53.0399476790 +16 16 45.171023042           ~ 51 0
11 V* SW UMa CV* 08 36 42.7494852536 +53 28 37.976353343           ~ 292 0
12 V* GY Cnc DN* 09 09 50.5407240020 +18 49 47.429782142           ~ 63 0
13 V* VZ Sex DN* 09 44 31.6824200550 +03 58 05.308838856     12.8     ~ 31 0
14 V* HY Leo XB* 09 46 34.4705286598 +13 50 57.849294677           ~ 15 0
15 V* AN UMa CV* 11 04 25.6556953228 +45 03 13.941355292     14.90     ~ 247 0
16 V* ST LMi AM* 11 05 39.7662126421 +25 06 28.744817170   15.10       DAH+M 210 0
17 V* QZ Vir CV* 11 38 26.8240425768 +03 22 07.110214355     15.81     ~ 243 1
18 V* KV Dra DN* 14 50 38.3286394733 +64 03 28.998917206   15.8       B1 34 0
19 V* AP CrB AM* 15 54 12.3454788903 +27 21 52.288656834     16.87 16.5   M3 37 0
20 V* WZ Sge DN* 20 07 36.5036203067 +17 42 14.733657651   15.30 15.20     DAepv 897 0
21 V* V521 Peg CV* 22 21 44.7931141812 +18 40 08.200211087     17.5     ~ 17 0
22 V* V455 And DN* 23 34 01.4485468687 +39 21 40.866526351   16.22 16.09 16.14   ~ 118 0

    Equat.    Gal    SGal    Ecl

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2021.03.08-02:18:23

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