2023JAVSO..51...74B

Query : 2023JAVSO..51...74B

2023JAVSO..51...74B - J. Am. Assoc. Variable star obs., 51, 74 (2023)

Long-term Study of Changes in the Orbital Periods of 18 Eclipsing SW Sextantis Stars.

BOYD D.

Abstract (from CDS):

SW Sex stars are an informal sub-class of eclipsing nova-like cataclysmic variables. We report 934 new eclipse times measured over the past 17 years for HS 0728+6738 (V482 Cam), SW Sex, DW UMa, HS 0129+2933 (TT Tri), V1315 Aql, PX And, HS 0455+8315, HS 0220+0603, BP Lyn, BH Lyn, LX Ser, UU Aqr, V1776 Cyg, RW Tri, 1RXS J064434.5+334451, AC Cnc, V363 Aur, and BT Mon. When combined with published eclipse times going back in some cases many decades, we show that these binary systems exhibit a range of behaviors, including increasing, decreasing, and possibly oscillating orbital periods. Nevertheless, the duration of these observations is still not long enough to be able to make reliable quantitative statements about their long term behaviors. In addition to these long term trends, we also observed rapid and unusual decreases in the orbital periods of SW Sex and RW Tri during 2017 and 2018, respectively.

Abstract Copyright: ∼

Journal keyword(s):

Status at CDS : Objects in title, abstract, text, figures, and all or part of small table(s) being processed in SIMBAD.

Simbad objects: 18

goto View the references in ADS

Number of rows : 18
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* PX And CV* 00 30 05.8083597744 +26 17 26.437695936   15.38 14.88 14.69   ~ 124 0
2 V* TT Tri CV* 01 31 59.8601500776 +29 49 22.060466364           ~ 37 0
3 HS 0220+0603 CV* 02 23 01.6666894560 +06 16 49.639082700   15.6 15.9     ~ 32 0
4 V* RW Tri CV* 02 25 36.1556820000 +28 05 50.891220600   13.50 12.50     M0V 324 0
5 HS 0455+8315 CV* 05 06 48.2817271272 +83 19 23.254416264   15.539 15.453 15.222   ~ 20 0
6 V* V363 Aur CV* 05 33 33.4591265880 +36 59 32.475580692     14.2     K0V 107 0
7 V* BT Mon No* 06 43 47.2416090432 -02 01 13.876883184   15.737 14.638 15.411   G8V 183 0
8 1RXS J064434.5+334451 CV* 06 44 34.3633514232 +33 44 56.611374792 13.11   13.56   12.8 ~ 29 0
9 V* V482 Cam CV* 07 33 41.4126954912 +67 32 15.629343864           ~ 25 0
10 PG 0818+513 CV* 08 22 36.0475955184 +51 05 24.558779364   15.73       ~ 127 0
11 V* AC Cnc CV* 08 44 27.1121665272 +12 52 31.995783264   13.80 14.15     K1-3V 154 0
12 V* BP Lyn CV* 09 03 08.8823527584 +41 17 47.562969840           ~ 59 0
13 V* SW Sex CV* 10 15 09.3769935988 -03 08 32.850732738           ~ 223 0
14 V* DW UMa CV* 10 33 52.8751411128 +58 46 54.717259044   14.33   14.33 14.35 ~ 254 0
15 V* LX Ser CV* 15 38 00.0938074584 +18 52 03.244681812     15.06     G8Ve 162 0
16 V* V1315 Aql CV* 19 13 54.5308677240 +12 18 03.239745228   14.81 14.33 14.33   ~ 136 0
17 V* V1776 Cyg CV* 20 23 30.5190973512 +46 31 29.438367528   17.2       ~ 37 0
18 V* UU Aqr CV* 22 09 05.7613016472 -03 46 17.688853416   13.998 13.919 13.735   ~ 153 0

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