2020AJ....160...70T

Query : 2020AJ....160...70T

2020AJ....160...70T - Astron. J., 160, 70-70 (2020/August-0)

Optical studies of eight AM Herculis-type cataclysmic variable stars.

THORSTENSEN J.R., MOTSOALEDI M., WOUDT P.A., BUCKLEY D.A.H. and WARNER B.

Abstract (from CDS):

We report detailed follow-up observations of eight cataclysmic variable stars (CVs) that are apparently AM Her stars, also called polars. For all, we either determine orbital periods for the first time or improve on existing determinations. The seven for which we have spectra show the high-amplitude radial-velocity curves and prominent He II λ4686 emission lines characteristic of strongly magnetic CVs, and their periods, which range from 81 to 219 minutes, are also typical for AM Her stars. Two objects from the Gaia-alerts index, Gaia18aot and Gaia18aya, are newly identified as CVs. Another, RX J0636.3+6554, eclipses deeply, while CSS 080228:081210+040352 shows a sharp dip that is apparently a partial eclipse. The spectrum of Gaia18aya has a cyclotron harmonic near λ5500 Å that constrains the surface field to ∼49 MG or greater.

Abstract Copyright: © 2020. The American Astronomical Society. All rights reserved.

Journal keyword(s): Cataclysmic variable stars - AM Herculis stars - Eclipsing binary stars - Close binary stars - Interacting binary stars - White dwarf stars

Simbad objects: 13

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Number of rows : 13
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* V479 And CV* 00 18 56.9328829992 +34 54 44.233790724           ~ 22 0
2 CD-34 239 PM* 00 41 30.4739854200 -33 37 32.030888686 13.138 11.969 10.525 9.619 8.741 K9V 116 0
3 SDSS J021107.98+305406.7 CV* 02 11 07.9834200294 +30 54 06.792260254           ~ 4 0
4 V* PT Per CV* 02 42 51.1935512424 +56 41 31.257122280           ~ 19 0
5 RX J0636.3+6554 CV* 06 36 22.8787260360 +65 54 15.002085996   19.5       ~ 6 0
6 CRTS J081210.2+040352 CV* 08 12 10.2386782948 +04 03 51.428440573           ~ 7 0
7 2MASS J10051658+6941367 CV* 10 05 16.6080325440 +69 41 36.411671652           ~ 10 0
8 LAWD 37 WD* 11 45 42.9169346379 -64 50 29.461957832 11.08 11.725 11.513 11.34 11.163 DQ 287 0
9 SDSS J133309.20+143706.9 CV* 13 33 09.1941574680 +14 37 06.919021956           ~ 13 0
10 SDSS J134441.83+204408.3 CV* 13 44 41.8335823344 +20 44 08.612197584   17.61 17.89     ~ 18 1
11 2MASS J14534105-5521387 CV* 14 53 41.0567607504 -55 21 38.723308992           ~ 46 0
12 V* AM Her CV* 18 16 13.2546725104 +49 52 04.759613537   15.124 14.808 13.525   M4.5-5Ve 1009 2
13 Gaia DR3 1956566510538468224 CV* 22 04 50.6850868872 +40 08 38.412954420           ~ 4 0

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