2020AJ....160...76R

Query : 2020AJ....160...76R

2020AJ....160...76R - Astron. J., 160, 76-76 (2020/August-0)

TIC 278956474: two close binaries in one young quadruple system identified by TESS.

ROWDEN P., BORKOVITS T., JENKINS J.M., STASSUN K.G., TWICKEN J.D., NEWTON E.R., ZIEGLER C., HELLIER C., SOTO A.G., MATTHEWS E.C., KOLB U., RICKER G.R., VANDERSPEK R., LATHAM D.W., SEAGER S., WINN J.N., BOUMA L.G., BRICENO C., CHARBONNEAU D., FONG W., GLIDDEN A., GUERRERO N.M., LAW N., MANN A.W., ROSE M.E., SCHLIEDER J., TENENBAUM P. and TING E.B.

Abstract (from CDS):

We have identified a quadruple system with two close eclipsing binaries in Transiting Exoplanet Survey Satellite (TESS) data. The object is unresolved in Gaia and appears as a single source at parallax 1.08 ± 0.01 mas. Both binaries have observable primary and secondary eclipses and were monitored throughout TESS Cycle 1 (sectors 1-13), falling within the TESS Continuous Viewing Zone. In one eclipsing binary (P = 5.488 days), the smaller star is completely occluded by the larger star during the secondary eclipse; in the other (P = 5.674 days) both eclipses are grazing. Using these data, spectroscopy, speckle photometry, spectral energy distribution analysis, and evolutionary stellar tracks, we have constrained the masses and radii of the four stars in the two eclipsing binaries. The Li I equivalent width indicates an age of 10-50 Myr and, with an outer period of 858_–5⁺⁷ days, our analysis indicates this is one of the most compact young 2 + 2 quadruple systems known.

Journal keyword(s): Close binary stars - Eclipsing binary stars - Young stellar objects - Multiple stars

Simbad objects: 27

Full paper

View the references in ADS

Number of rows : 27

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	NAME THA	MGr	00 00	-62.0						~	540	0
2	UCAC2 31795973	**	00 48 32.6475959664	+00 10 18.572940552		13.31	12.76	12.77	12.14	~	17	0
3	NAME MBM 12 Association	As*	02 56.0	+19 32						~	18	0
4	V* BV Ari	Or*	02 56 08.424288	+20 03 38.57004		16.93	15.42	14.37		M3Ve	38	0
5	V* V1098 Tau	Or*	04 14 47.9897419517	+27 52 34.232647358		14.08	11.73	10.95		M1	122	0
6	V* GG Tau	Or*	04 32 30.3506925552	+17 31 40.494063144	14.84	14.78	13.40	11.54		M0e+M2.0e	793	1
7	HD 34700	Or*	05 19 41.4089390784	+05 38 42.778590864	9.75	9.778	9.659	9.205	8.47	G0IVe	125	0
8	V* AB Dor	TT*	05 28 44.8712165880	-65 26 55.199147208	8.259	7.856	6.999	6.496	5.993	K0V	1080	0
9	NAME SEP	reg	06 00 00.000	-66 33 38.55						~	198	0
10	NAME AB Dor Moving Group	MGr	06 38 53.4	-42 50 04						~	540	0
11	UCAC4 165-008872	*	06 45 41.2479301008	-57 08 17.108169396						~	12	0
12	V* AO Vel	EB*	08 11 53.9160599592	-48 44 46.003619076		9.36	9.37			BpSi+B8V+B9/A0+B9/A0	67	0
13	Cl Mamajek 1	OpC	08 42 32.9	-78 57 47						~	392	0
14	HD 86588	TT*	09 53 13.7246814696	-79 33 28.627177500		10.17	9.63			F6V	23	0
15	HD 91962	SB*	10 36 59.9979931102	-08 50 23.512435908		7.87	7.23		6.34	G1V	77	0
16	NAME TW Hya Association	As*	11 01.9	-34 42						~	1018	0
17	HD 95660	SB*	11 02 51.9104777040	+30 24 54.702250596		8.43	8.06			F5V	99	1
18	HD 98800	TT*	11 22 05.28975	-24 46 39.7571		10.20	9.28	9.26	7.386	K5V(e)	401	0
19	NAME eps Cha Association	OpC	11 59 51	-78 12.4						~	188	0
20	NAME Ursa Major Moving Group	MGr	12 32	+57.0						~	467	1
21	NAME beta Pic Moving Group	MGr	14 30	-42.0						~	894	0
22	[CW98] IRS 5	IR	18 20 24.6	-16 11 40						~	19	1
23	V* V994 Her	**	18 27 45.89332	+24 41 50.6652						B9Vn	70	1
24	HD 181469	**	19 18 58.21759	+39 16 01.7913		8.336	8.021	8.65		F1Vwkmet(A9)	73	0
25	NAME Carina-near Moving Group	MGr	~	~						~	118	0
26	NAME Octans Association	As*	~	~						~	101	0
27	NAME Argus Association	As*	~	~						~	266	0

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