2013A&A...558A..55M

Query : 2013A&A...558A..55M

2013A&A...558A..55M - Astronomy and Astrophysics, volume 558A55-55 (2013/10-1)

HATS-2b: a transiting extrasolar planet orbiting a K-type star showing starspot activity.

MOHLER-FISCHER M., MANCINI L., HARTMAN J.D., BAKOS G.A., PENEV K., BAYLISS D., JORDAN A., CSUBRY Z., ZHOU G., RABUS M., NIKOLOV N., BRAHM R., ESPINOZA N., BUCHHAVE L.A., BEKY B., SUC V., CSAK B., HENNING T., WRIGHT D.J., TINNEY C.G., ADDISON B.C., SCHMIDT B., NOYES R.W., PAPP I., LAZAR J., SARI P. and CONROY P.

Abstract (from CDS):

We report the discovery of HATS-2b, the second transiting extrasolar planet detected by the HATSouth survey. HATS-2b is moving on a circular orbit around a V=13.6mag, K-type dwarf star (GSC 6665-00236), at a separation of 0.0230±0.0003 AU and with a period of 1.3541 days. The planetary parameters have been robustly determined using a simultaneous fit of the HATSouth, MPG/ESO 2.2m/GROND, Faulkes Telescope South/Spectral transit photometry, and MPG/ESO 2.2m/FEROS, Euler 1.2m/CORALIE, AAT 3.9m/CYCLOPS radial-velocity measurements. HATS-2b has a mass of 1.37±0.16M_J, a radius of 1.14±0.03R_J, and an equilibrium temperature of 1567±30K. The host star has a mass of 0.88±0.04M_☉ and a radius of 0.89±0.02R_☉, and it shows starspot activity. We characterized the stellar activity by analyzing two photometric follow-up transit light curves taken with the GROND instrument, both obtained simultaneously in four optical bands (covering the wavelength range of 3860-9520Å). The two light curves contain anomalies compatible with starspots on the photosphere of the host star along the same transit chord.

Abstract Copyright: ∼

Journal keyword(s): planetary systems - techniques: spectroscopic - stars: fundamental parameters - techniques: photometric - stars: individual: HATS-2 - stars: individual: GSC 6665-00236

VizieR on-line data: <Available at CDS (J/A+A/558/A55): hats2_ft.dat hats2_g1.dat hats2_r1.dat hats2_i1.dat hats2_z1.dat hats2_g2.dat hats2_r2.dat hats2_i2.dat hats2_z2.dat>

Simbad objects: 20

Full paper

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Number of rows : 20

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	WASP-32b	Pl	00 15 50.8077262344	+01 12 01.588900896						~	47	1
2	WASP-45b	Pl	00 20 56.9941303416	-35 59 53.746646676						~	44	1
3	HD 283750	BY*	04 36 48.2421502608	+27 07 55.888214520		9.19	8.10	7.4		K2.5Ve	289	0
4	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
5	V* YY Gem	SB*	07 34 37.4474327544	+31 52 10.179641496	11.60	10.56	9.27	7.69	6.67	M0.5VeFe-2	882	0
6	V* LQ Hya	BY*	09 32 25.5683895648	-11 11 04.692242760	9.316	8.761	7.891	7.288	6.815	K1Vp	480	0
7	V* V557 Car	BY*	10 42 41.5146144624	-64 21 04.333829688		11.26	12.03			G2V	71	0
8	HATS-2b	Pl	11 46 57.3702458424	-22 33 46.817348148						~	32	1
9	HATS-2	*	11 46 57.3702458424	-22 33 46.817348148		14.53	13.62	13.40		~	50	1
10	HD 118100	PM*	13 34 43.2063495866	-08 20 31.338030204	11.578	10.552	9.372	8.602	7.930	K5Ve	360	0
11	V* EK Dra	BY*	14 39 00.2104038120	+64 17 29.979649860		8.243	7.604			G5VFe-0.7CH-1(k)	500	0
12	V* BY Dra	BY*	18 33 55.7720712062	+51 43 08.897780286	10.22	9.23		8.733		K4Ve+K7.5Ve	639	0
13	HAT-P-37	*	18 57 11.0562256392	+51 16 08.850467640		13.1	13.23	13.58		~	31	1
14	NAME V672 Lyr b	Pl	19 04 09.8515616256	+36 37 57.446680296						~	354	1
15	Kepler-1b	Pl	19 07 14.0375836512	+49 18 59.091482160						~	349	2
16	NGC 6811	OpC	19 37 21.8	+46 22 43		7.47	6.8			~	435	0
17	HD 189733	BY*	20 00 43.7129433648	+22 42 39.073143456	9.241	8.578	7.648	7.126	6.68	K2V	991	1
18	HD 197481	BY*	20 45 09.5324974119	-31 20 27.237889841		10.05	8.627	9.078	6.593	M1VeBa1	1344	0
19	V* EV Lac	PM*	22 46 49.7312610268	+44 20 02.374381562		11.85	10.26	9.89		M4.0Ve	993	2
20	* 51 Peg	PM*	22 57 27.9804852576	+20 46 07.797040104	6.39	6.16	5.46	4.97	4.61	G2IV	1216	1

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