2020MNRAS.498.2833C

Query : 2020MNRAS.498.2833C

2020MNRAS.498.2833C - Mon. Not. R. Astron. Soc., 498, 2833-2844 (2020/October-3)

Recovering variable stars in large surveys: EAup Algol-type class in the Catalina Survey.

CARMO A., FERREIRA LOPES C.E., PAPAGEORGIOU A., JABLONSKI F.J., RODRIGUES C.V., DRAKE A.J., CROSS N.J.G. and CATELAN M.

Abstract (from CDS):

The discovery and characterization of Algol eclipsing binaries (EAs) provide an opportunity to contribute for a better picture of the structure and evolution of low-mass stars. However, the cadence of most current photometric surveys hinders the detection of EAs since the separation between observations is usually larger than the eclipse(s) duration and hence few measurements are found at the eclipses. Even when those objects are detected as variable, their periods can be missed if an appropriate oversampling factor is not used in the search tools. In this paper, we apply this approach to find the periods of stars catalogued in the Catalina Real-Time Transient Survey (CRTS) as EAs having unknown period (EAup). As a result, the periods of ∼56 per cent of them were determined. Eight objects were identified as low-mass binary systems and modelled with the Wilson & Devinney synthesis code combined with a Markov chain Monte Carlo optimization procedure. The computed masses and radii are in agreement with theoretical models and show no evidence of inflated radii. This paper is the first of a series aiming to identify suspected binary systems in large surveys.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): methods: data analysis - techniques: photometric - astronomical data bases: miscellaneous - stars: late-type - stars: low-mass - stars: variables: general

VizieR on-line data: <Available at CDS (J/MNRAS/498/2833): table2.dat tablea1.dat tableb1.dat tableb2.dat>

Simbad objects: 85

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Number of rows : 85
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 CRTS J001223.5+274350 EB* 00 12 23.4525515736 +27 43 51.265384752     16.03     ~ 4 0
2 CRTS J002509.1+385544 EB* 00 25 09.1850613360 +38 55 44.350464900   14.261 13.726 13.671   ~ 4 0
3 CRTS J003441.8-135032 EB* 00 34 41.85 -13 50 32.8     14.79     ~ 2 0
4 CRTS J003827.1+410334 EB* 00 38 27.2012777544 +41 03 33.841803384     14.41     ~ 4 0
5 GSC 02810-00523 EB* 00 53 32.7951248472 +44 02 26.612110356     13.82     ~ 4 0
6 CRTS J020021.5+213412 EB* 02 00 21.5481668352 +21 34 12.536853924     16.50     ~ 2 0
7 CRTS J025355.2+353950 EB* 02 53 55.2538394280 +35 39 50.730435108     14.17     ~ 2 0
8 CRTS J025414.6+002004 EB* 02 54 14.7013739136 +00 20 04.531064208     14.95     ~ 2 0
9 CRTS J030246.9-121937 EB* 03 02 46.8947434488 -12 19 37.204792572     14.09     ~ 3 0
10 CRTS J030604.9+282408 EB* 03 06 05.0162038968 +28 24 08.520547284     15.82     ~ 3 0
11 CRTS J031907.5+384354 EB* 03 19 07.5521768760 +38 43 54.393033396     12.98     ~ 4 0
12 [DCO2008] T-Per1-10602 EB* 03 27 24.6501668112 +36 01 53.995360620   14.875 13.76 13.750   ~ 4 0
13 [DCO2008] T-Per1-14454 EB* 03 46 25.6329075816 +35 46 12.103873212   15.770 14.23 14.070   ~ 4 0
14 CRTS J035048.7+204955 EB* 03 50 48.8093501568 +20 49 55.277718276     16.60     ~ 3 0
15 CRTS J035633.1+320912 EB* 03 56 33.1331202990 +32 09 12.057755781           kA3hA9mF0 4 0
16 CRTS J035654.8+395231 EB* 03 56 54.8911808448 +39 52 31.560808368     14.10     ~ 6 0
17 CRTS J041359.0+314056 EB* 04 13 59.0519051784 +31 40 55.926708528     14.97     ~ 2 0
18 CRTS J041810.3-024627 EB* 04 18 10.4134306512 -02 46 27.608390148     15.16 14.935 14.367 ~ 3 0
19 CRTS J042305.8+003947 EB* 04 23 05.8377619080 +00 39 47.284020036     15.63     ~ 3 0
20 CRTS J043933.7+365854 EB* 04 39 33.7854428808 +36 58 54.267051360     14.28     ~ 3 0
21 CRTS J043938.6+061238 EB* 04 39 38.6512852968 +06 12 38.547467712     14.35     ~ 3 0
22 CRTS J045258.7+331809 EB* 04 52 58.7035906968 +33 18 10.014394896     15.84     ~ 4 0
23 V* V1637 Ori EB* 04 53 08.5931139216 -03 29 52.725821964   12.46 12.25     kA3hA7mA8 20 0
24 CRTS J045516.1-004733 EB* 04 55 16.1052904104 -00 47 33.049215636     15.19     ~ 3 0
25 CRTS J050224.2-113916 EB* 05 02 24.2842334352 -11 39 15.606855468     13.51     ~ 4 0
26 CRTS J050242.7+131025 EB* 05 02 42.7832113608 +13 10 25.310434584     14.46     ~ 3 0
27 CRTS J050515.1+284725 EB* 05 05 15.2194061712 +28 47 25.786180392     15.55     ~ 3 0
28 CRTS J052736.9+140215 EB* 05 27 37.0042026480 +14 02 15.644864184     16.24     ~ 2 0
29 CRTS J053059.3-102647 EB* 05 30 59.4028249728 -10 26 47.864681268     13.36     ~ 4 0
30 CRTS J053931.4-152107 EB* 05 39 31.4641427208 -15 21 07.743779712     14.89     ~ 2 0
31 CRTS J054859.3+074331 EB* 05 48 59.3957851599 +07 43 31.241521269           ~ 4 0
32 CRTS J054951.2-180440 EB* 05 49 51.3138756120 -18 04 40.901849580     15.42     ~ 3 0
33 CRTS J060321.6-040517 EB* 06 03 21.6782339424 -04 05 18.012457824     16.03     ~ 2 0
34 CRTS J060409.8-072110 EB* 06 04 09.8023534272 -07 21 10.358778816     14.48     ~ 3 0
35 CRTS J061902.1+631324 EB* 06 19 02.1962182032 +63 13 23.528300952     15.79     ~ 5 0
36 CRTS J062419.5-103506 EB* 06 24 19.6256539272 -10 35 07.104874632     16.45     ~ 5 0
37 CRTS J065935.8+592538 EB* 06 59 35.8963960296 +59 25 37.789265100     13.14     ~ 4 0
38 CRTS J070423.0+593108 EB* 07 04 23.0159367720 +59 31 07.915360584     14.60     ~ 4 0
39 CRTS J071357.1+342138 EB* 07 13 57.2234784024 +34 21 38.557777824     17.01     ~ 3 0
40 CRTS J073807.8+221414 EB* 07 38 07.87 +22 14 14.3     13.55     ~ 2 0
41 CRTS J074854.5+312748 EB* 07 48 54.5384175936 +31 27 48.232789020     14.47     ~ 3 0
42 CRTS J080118.6+033634 EB* 08 01 18.6428889120 +03 36 34.461905508     13.12     ~ 3 0
43 CRTS J080327.2+503948 EB* 08 03 27.2863504080 +50 39 48.970141056     13.76     ~ 4 0
44 CRTS J080331.2+135122 EB* 08 03 31.2165041616 +13 51 23.926856256     15.86     ~ 3 0
45 CRTS J080549.5+403108 EB* 08 05 49.6103452656 +40 31 08.896561932     17.33     ~ 2 0
46 CRTS J081331.4-013918 EB* 08 13 31.4486044704 -01 39 19.031609160     14.17     ~ 4 0
47 CRTS J083118.6-081856 EB* 08 31 18.7142567160 -08 18 56.649182256     14.86     ~ 4 0
48 CRTS J083125.1-090301 EB* 08 31 25.0481854416 -09 03 00.579003048     16.33     ~ 3 0
49 CRTS J084552.4-061418 EB* 08 45 52.4587368888 -06 14 18.643487568     15.70     ~ 3 0
50 CRTS J084835.6+253918 EB* 08 48 35.7050876136 +25 39 18.132326424     16.21     ~ 3 0
51 CRTS J085050.6+073028 EB* 08 50 50.6402096064 +07 30 28.304230392     13.84     ~ 3 0
52 LINEAR 5744703 EB* 08 56 56.0217186720 +38 20 28.012664184     15.58     ~ 4 0
53 CRTS J085743.8-030448 EB* 08 57 43.8674635896 -03 04 48.541394172     15.44     ~ 2 0
54 LINEAR 5830262 EB* 09 03 55.3486770144 +53 31 32.253330720     15.08     ~ 5 0
55 CRTS J091430.0-111446 EB* 09 14 30.0934405584 -11 14 47.077269432     16.11     ~ 3 0
56 GSC 03433-00277 EB* 09 45 58.1783655048 +45 48 14.335097544     13.61     ~ 5 0
57 CRTS J100846.9-160703 EB* 10 08 46.9518883584 -16 07 03.760082400     16.19     ~ 2 0
58 LINEAR 21655849 EB* 10 10 00.7181049720 -01 02 13.404107652     14.51     ~ 5 0
59 CRTS J102224.7+062518 EB* 10 22 24.7932330744 +06 25 17.876270424     16.26     ~ 2 0
60 CRTS J103914.0+064824 EB* 10 39 14.0507421987 +06 48 24.423373637           ~ 3 0
61 CRTS J104916.3-175650 EB* 10 49 16.3561627920 -17 56 50.881611984     15.66     ~ 5 0
62 CRTS J110309.4+014240 EB* 11 03 09.6165735480 +01 42 40.518346932     13.93     ~ 2 0
63 LINEAR 1565093 EB* 11 32 48.7781736288 +03 30 02.084423616   15.99 14.98 14.82   ~ 15 0
64 CRTS J125153.5+293917 EB* 12 51 53.5229921808 +29 39 16.912760184     15.36     ~ 2 0
65 CRTS J144057.5-191558 EB* 14 40 57.5593853856 -19 15 59.006109708     14.26     ~ 2 0
66 CRTS J145100.7+052841 EB* 14 51 00.6692273472 +05 28 43.295654856     15.81     ~ 2 0
67 CRTS J162004.6+145346 EB* 16 20 04.7052233160 +14 53 45.543809868     16.21     ~ 3 0
68 CRTS J162549.3+102124 EB* 16 25 49.4204986680 +10 21 23.868850680     16.77     ~ 3 0
69 CRTS J163922.3-031006 EB* 16 39 22.3596493176 -03 10 06.031927236     14.17     ~ 3 0
70 CRTS J164108.5+163433 EB* 16 41 08.5366792800 +16 34 34.140845604     14.13     ~ 3 0
71 [DCO2008] T-Dra0-09996 EB* 16 44 04.4121138936 +57 42 26.662641696   16.460 15.09 14.925   ~ 8 0
72 CRTS J170319.1+013946 EB* 17 03 19.1621086680 +01 39 47.529551088     16.29     ~ 3 0
73 V* V423 Her EB* 17 33 56.0766841440 +26 48 46.250355060     14.11     ~ 7 0
74 CRTS J175341.0+444623 EB* 17 53 40.990608 +44 46 23.67228   13.37 12.80 12.92   kA6hF1mF1 4 0
75 CRTS J180743.0+502014 EB* 18 07 43.0612976112 +50 20 14.750361420     15.81     ~ 7 0
76 CRTS J205605.9-063809 EB* 20 56 05.9795343624 -06 38 09.343765320     17.10     ~ 3 0
77 CRTS J211507.1+042944 EB* 21 15 07.1071144224 +04 29 44.855440440     13.94     ~ 2 0
78 CRTS J222100.4-105449 EB* 22 21 00.4956851520 -10 54 49.823405388     15.53     ~ 3 0
79 CRTS J222615.0+211301 EB* 22 26 15.0226270848 +21 13 01.460720424     12.94 12.740   ~ 3 0
80 CRTS J225011.3+172418 EB* 22 50 11.3313934224 +17 24 18.144290412     15.36     ~ 3 0
81 CRTS J225211.1+080336 EB* 22 52 11.0304181536 +08 03 37.973148552     15.73     ~ 2 0
82 CRTS J231824.8+310818 EB* 23 18 24.8317117104 +31 08 18.416343336     15.72     ~ 4 0
83 CRTS J232619.3+334509 EB* 23 26 19.3232121576 +33 45 11.043519372     16.17     ~ 2 0
84 CRTS J232718.6+415044 EB* 23 27 18.6699828312 +41 50 45.005050248     14.69     ~ 6 0
85 CRTS J233755.5+295554 EB* 23 37 55.5983533968 +29 55 54.366271140     15.39     ~ 3 0

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