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


Query : 2005A&A...443..995A

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 - 2022
#notes
1 HS 0139+0559 CV* 01 41 39.9217828176 +06 14 37.494706740   14.9 15.4     ~ 12 0
2 HS 0229+8016 CV* 02 35 58.2097250160 +80 29 44.285975556   13.9 13.9     ~ 10 0
3 USNO-A2.0 1650-00512682 * 02 36 13.8526148160 +80 30 06.137471916   13.5 13.1     ~ 1 0
4 2MASS J05132139+7729065 * 05 13 21.3723153840 +77 29 06.508277736   14.2 13.6     ~ 1 0
5 HS 0506+7725 CV* 05 13 36.5693562840 +77 28 42.782628216   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 16.2519466536 +73 34 39.105603804       14.3   ~ 62 0
8 HS 0642+5049 CV* 06 46 19.6073560896 +50 45 49.211945352   16.6 16.8     ~ 6 0
9 2MASS J06462006+5043273 * 06 46 20.0708826384 +50 43 27.274150740   13.3 12.9     ~ 1 0
10 V* DW Cnc CV* 07 58 53.0399000904 +16 16 45.169158720           ~ 54 0
11 V* SW UMa CV* 08 36 42.7492998216 +53 28 37.976599020           ~ 295 0
12 V* GY Cnc CV* 09 09 50.5407550968 +18 49 47.429496300           ~ 70 0
13 V* VZ Sex SB* 09 44 31.6813494432 +03 58 05.300563116     12.8     ~ 32 0
14 V* HY Leo XB* 09 46 34.4706027984 +13 50 57.845238504           ~ 16 0
15 V* AN UMa CV* 11 04 25.6556168328 +45 03 13.940184528     14.90     ~ 248 0
16 V* ST LMi CV* 11 05 39.7664319408 +25 06 28.746723096   16.832 16.524 15.639   DAH+M 211 0
17 V* QZ Vir CV* 11 38 26.8241432424 +03 22 07.110298596     15.81     ~ 245 1
18 V* KV Dra CV* 14 50 38.3283335160 +64 03 29.003633136           B1 34 0
19 V* AP CrB CV* 15 54 12.3454476576 +27 21 52.290975024     16.87 16.5   M3 38 0
20 V* WZ Sge CV* 20 07 36.5037622512 +17 42 14.733254952   15.30 15.20     DAepv 914 0
21 V* V521 Peg CV* 22 21 44.7931808160 +18 40 08.201442360           ~ 19 0
22 V* V455 And CV* 23 34 01.4484962496 +39 21 40.866079356   16.22 16.09 16.14   ~ 126 0

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2022.05.24-11:37:20

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