2012MNRAS.422.1988A

Query : 2012MNRAS.422.1988A

2012MNRAS.422.1988A - Mon. Not. R. Astron. Soc., 422, 1988-1998 (2012/May-3)

WASP-44b, WASP-45b and WASP-46b: three short-period, transiting extrasolar planets.

ANDERSON D.R., COLLIER CAMERON A., GILLON M., HELLIER C., JEHIN E., LENDL M., MAXTED P.F.L., QUELOZ D., SMALLEY B., SMITH A.M.S., TRIAUD A.H.M.J., WEST R.G., PEPE F., POLLACCO D., SEGRANSAN D., TODD I. and UDRY S.

Abstract (from CDS):

We report the discovery of three extrasolar planets that transit their moderately bright (m_V= 12-13) host stars. WASP-44b is a 0.89-M_Jup planet in a 2.42-day orbit around a G8V star. WASP-45b is a 1.03-M_Jup planet which passes in front of the limb of its K2V host star every 3.13 days. Weak Ca II H&K emission seen in the spectra of WASP-45 suggests that the star is chromospherically active. WASP-46b is a 2.10-M_Jup planet in a 1.43-day orbit around a G6V star. Rotational modulation of the light curves of WASP-46 and weak Ca II H&K emission in its spectra show the star to be photospherically and chromospherically active.

We imposed circular orbits in our analyses as the radial-velocity data are consistent with (near-)circular orbits, as could be expected from both empirical and tidal-theory perspectives for such short-period, ∼Jupiter-mass planets. We discuss the impact of fitting for eccentric orbits for such planets when not supported by the data. The derived planetary and stellar radii depend on the fitted eccentricity and these parameters inform intense theoretical efforts concerning tidal circularization and heating, bulk planetary composition and the observed systematic errors in planetary and stellar radii. As such, we recommend exercising caution in fitting the orbits of short-period, ∼Jupiter-mass planets with an eccentric model when there is no evidence of non-circularity.

Abstract Copyright: 2012 The Authors Monthly Notices of the Royal Astronomical Society2012 RAS

Journal keyword(s): planets and satellites: individual: WASP-44b - planets and satellites: individual: WASP-45b - planets and satellites: individual: WASP-46b - stars: individual: WASP-44 - stars: individual: WASP-45 - stars: individual: WASP-46

VizieR on-line data: <Available at CDS (J/MNRAS/422/1988): table3.dat table1.dat table2.dat>

Simbad objects: 15

Full paper

View the references in ADS

Number of rows : 15

N	Identifier	Otype	ICRS (J2000) RA	ICRS (J2000) DEC	Mag B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2026	#notes
1	WASP-44b	Pl	00 15 36.7694650296	-11 56 17.284833996					~	39	1
2	WASP-44	*	00 15 36.7694650296	-11 56 17.284833996	13.823	13.054	12.988	12.19	~	46	1
3	WASP-45b	Pl	00 20 56.9941303416	-35 59 53.746646676					~	44	1
4	WASP-45	PM*	00 20 56.9941303416	-35 59 53.746646676	13.33	11.80	12.20		~	43	1
5	HAT-P-32	*	02 04 10.2774374568	+46 41 16.212315084	11.79	11.44	11.23		~	88	1
6	HAT-P-32b	Pl	02 04 10.2774374568	+46 41 16.212315084					~	198	1
7	BD+57 793b	Pl	04 21 52.7048156328	+57 49 01.889294952					~	234	1
8	HAT-P-33b	Pl	07 32 44.2173520776	+33 50 06.115051104					~	59	1
9	HAT-P-33	Em*	07 32 44.2173520776	+33 50 06.115051104	11.66	11.03	11.10		F4	48	1
10	HAT-P-21b	Pl	11 25 05.9859193536	+41 01 40.664937216					~	43	1
11	BD+22 2716b	Pl	14 33 06.3571702344	+21 53 40.981395876					~	170	1
12	CD-27 10695	*	15 59 50.9491505016	-28 03 42.312819096	11.83	11.59	11.31	10.92	F4	141	1
13	CD-27 10695b	Pl	15 59 50.9491505016	-28 03 42.312819096					~	313	1
14	WASP-46	*	21 14 56.8598669520	-55 52 18.458085144	13.0		13.06	12.29	G6	56	1
15	WASP-46b	Pl	21 14 56.8598669520	-55 52 18.458085144					~	54	1

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