2022MNRAS.510.1857K

Query : 2022MNRAS.510.1857K

2022MNRAS.510.1857K - Mon. Not. R. Astron. Soc., 510, 1857-1866 (2022/February-3)

New photometry of 12 ultrashort-period late-type binary stars.

KOEN C.

Abstract (from CDS):

Candidate late-type binary stars were selected on the basis of their red g - i and r - z colours, and short (0.1159-0.2059 d) published periods. At least one cycle of variation of each star was observed in the RC and IC bands. For the five brightest stars, observations were also obtained in V. Typically ∼17 standardized photometric measurements of each of the stars, ranging over the optical and infrared, are available from various surveys. These were used to accurately determine the reddenings and effective temperatures. In all but one case Gaia parallaxes are available, so that the luminosities of the binaries could also be estimated. Deduced spectral types are in the range M2-M4.5. Preliminary modelling suggests that half the stars may be in contact configurations.

Abstract Copyright: © 2021 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): binaries: close - stars: late-type - stars: variables: general

Simbad objects: 16

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Number of rows : 16
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 ATO J000.4663-07.7591 EB* 00 01 51.7886004525 -07 45 32.867924045           ~ 5 0
2 LSPM J0220+3320 ** 02 20 50.850720 +33 20 47.55228   14.86 13.37 12.98 10.98 M2e 52 0
3 2MASS J02315615-3230410 EB* 02 31 56.1438905236 -32 30 41.031631061           ~ 1 0
4 2MASS J03484994-3133059 EB* 03 48 49.9552390364 -31 33 05.945576232           ~ 1 0
5 CRTS J045629.3-130741 EB* 04 56 29.4031394952 -13 07 41.299290048     15.39     ~ 4 0
6 ATO J077.1457-12.0594 V* 05 08 34.9985303182 -12 03 33.451996966           ~ 3 0
7 ATO J087.2525-21.4364 V* 05 49 00.6427553191 -21 26 11.338453933           ~ 3 0
8 ATO J137.7047-28.1734 V* 09 10 49.1862815425 -28 10 24.381165256           ~ 4 0
9 ATO J149.5837-14.2846 ** 09 58 20.087808 -14 17 05.54208   18.318 16.454 16.011   ~ 4 0
10 ATO J157.4264-28.5737 PM* 10 29 42.4055374300 -28 34 24.781837780           ~ 3 0
11 ASAS J120036-3915.6 EB* 12 00 36.3237445488 -39 15 35.111271060   11.70 10.90     ~ 9 0
12 ATO J199.6731-31.7189 EB? 13 18 41.5422475272 -31 43 07.071787848   17.50 15.76 15.74 12.76 M4 8 0
13 LINEAR 10420155 EB* 13 54 58.7691279048 -04 51 07.365364632           ~ 6 0
14 2MASS J17301549-7559331 EB* 17 30 15.4951466307 -75 59 33.001665449           ~ 1 0
15 OGLE BLG647.29 6718 EB* 17 52 09.0009346608 -25 32 01.709100312     21.381   18.716 ~ 8 0
16 ATO J273.0414+03.6432 EB* 18 12 09.9739100031 +03 38 36.726862695           ~ 4 0

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