2007MNRAS.375..951C

Query : 2007MNRAS.375..951C

2007MNRAS.375..951C - Mon. Not. R. Astron. Soc., 375, 951-957 (2007/March-1)

WASP-1b and WASP-2b: two new transiting exoplanets detected with SuperWASP and SOPHIE.

COLLIER CAMERON A., BOUCHY F., HEBRARD G., MAXTED P., POLLACCO D., PONT F., SKILLEN I., SMALLEY B., STREET R.A., WEST R.G., WILSON D.M., AIGRAIN S., CHRISTIAN D.J., CLARKSON W.I., ENOCH B., EVANS A., FITZSIMMONS A., FLEENOR M., GILLON M., HASWELL C.A., HEBB L., HELLIER C., HODGKIN S.T., HORNE K., IRWIN J., KANE S.R., KEENAN F.P., LOEILLET B., LISTER T.A., MAYOR M., MOUTOU C., NORTON A.J., OSBORNE J., PARLEY N., QUELOZ D., RYANS R., TRIAUD A.H.M.J., UDRY S. and WHEATLEY P.J.

Abstract (from CDS):

We have detected low-amplitude radial-velocity variations in two stars, USNO-B1.0 1219-0005465 (GSC 02265-00107 = WASP-1) and USNO-B1.0 0964-0543604 (GSC 00522-01199 = WASP-2). Both stars were identified as being likely host stars of transiting exoplanets in the 2004 SuperWASP wide-field transit survey. Using the newly commissioned radial-velocity spectrograph SOPHIE at the Observatoire de Haute-Provence, we found that both objects exhibit reflex orbital radial-velocity variations with amplitudes characteristic of planetary-mass companions and in-phase with the photometric orbits. Line-bisector studies rule out faint blended binaries as the cause of either the radial-velocity variations or the transits. We perform preliminary spectral analyses of the host stars, which together with their radial-velocity variations and fits to the transit light curves yield estimates of the planetary masses and radii. WASP-1b and WASP-2b have orbital periods of 2.52 and 2.15 d, respectively. Given mass estimates for their F7V and K1V primaries, we derive planet masses 0.80-0.98 and 0.81-0.95 times that of Jupiter, respectively. WASP-1b appears to have an inflated radius of at least 1.33 RJup, whereas WASP-2b has a radius in the range 0.65-1.26 RJup.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): methods: data analysis - techniques: photometric - techniques: radial velocities - planetary systems

Nomenclature: Table 2: WASP N (Nos 1-2). Table 4: WASP Nb (Nos 1b, 2b).

Simbad objects: 29

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Number of rows : 29
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-1b Pl 00 20 40.0745768856 +31 59 23.954809596           ~ 134 1
2 WASP-1 V* 00 20 40.0745768856 +31 59 23.954809596   12.06 11.31     F7V 136 1
3 1SWASP J005225.90+203451.2 EB* 00 52 25.9080547872 +20 34 51.320057952   11.74 11.04     ~ 5 0
4 TYC 2277-250-1 SB* 01 01 51.1078039992 +31 42 54.753917508   11.34 10.83     kA2hF0mF0Sr 13 0
5 1SWASP J025500.31+281134.0 V* 02 55 00.31 +28 11 34.0     11.8     ~ 4 0
6 2MASS J03110320+2111413 SB* 03 11 03.1962767952 +21 11 41.319268044           G0V 6 0
7 TYC 2389-1148-1 V* 05 12 21.3512992824 +30 06 34.883491464   11.32 10.96     ~ 4 0
8 TYC 2042-7-1 PM* 16 17 32.8987123272 +24 21 19.187796024   12.68 11.57 11.45   ~ 9 1
9 TYC 2067-157-1 SB* 16 59 49.1359313664 +26 53 46.143007296   11.31 10.83     ~ 5 1
10 TYC 3088-1051-1 SB* 17 41 18.3054810144 +38 36 56.399454972   11.83 11.39     ~ 5 1
11 1SWASP J181252.03+461851.6 V* 18 12 52.0431952992 +46 18 51.600889620   12.60 11.97     ~ 4 0
12 1SWASP J183104.01+323942.7 SB* 18 31 04.0081814448 +32 39 42.745504680   11.47 11.26     F8 6 1
13 UCAC4 683-065727 V* 18 43 03.6109535952 +46 26 56.468010516   13.305 12.173 11.980   K1III 6 1
14 WASP-2 V* 20 30 54.1282355304 +06 25 46.341284844   13 11.98     K1.5 157 1
15 WASP-2b Pl 20 30 54.1282355304 +06 25 46.341284844           ~ 112 1
16 WASP-2B * 20 30 54.179 +06 25 46.18           M0-1.5 23 1
17 TYC 1634-279-1 V* 20 41 25.2792608136 +16 39 11.874676824   12.07 11.301 10.883   K5 5 1
18 BD+06 4660 Ro* 20 50 27.3305180280 +06 40 22.942114500   10.48 9.93     F8 4 1
19 HD 353172 SB* 20 53 08.0350877640 +19 21 52.769906352   11.52 10.98     F2 5 1
20 TYC 1103-1567-1 * 21 03 18.0181437648 +08 01 17.822723556   12.79 12.08     G7 7 1
21 TYC 1650-604-1 SB* 21 16 08.4278905248 +16 32 20.411623428   11.67 11.27     F8 4 1
22 TYC 2193-597-1 * 21 41 51.0420007680 +26 01 58.573281324   11.55 10.12     ~ 3 0
23 TYC 2207-1556-1 SB* 21 58 02.1484191072 +25 30 06.232173696   11.56 10.83     ~ 4 0
24 HD 209458b Pl 22 03 10.7727465312 +18 53 03.549393384           ~ 2037 1
25 1SWASP J222317.60+130125.8 V* 22 23 17.60 +13 01 25.8           ~ 3 0
26 TYC 2747-1081-1 SB* 22 33 20.4538664882 +37 01 38.859261459   11.39 10.71     ~ 4 0
27 TYC 1708-1146-1 SB* 22 36 51.2047829592 +22 10 00.900397092   12.34 11.66 11.48   ~ 4 0
28 NAME BD+37 4734Bb Pl 22 57 46.8442481880 +38 40 30.358351704           ~ 268 1
29 BD+29 4980 SB* 23 43 18.4165031376 +29 55 56.623055412   11.54 10.53 10.31   ~ 15 0

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