2013A&A...551A.108M


C.D.S. - SIMBAD4 rel 1.7 - 2019.12.06CET01:46:05

2013A&A...551A.108M - Astronomy and Astrophysics, volume 551A, 108-108 (2013/3-1)

Multi-site campaign for transit timing variations of WASP-12 b: possible detection of a long-period signal of planetary origin.

MACIEJEWSKI G., DIMITROV D., SEELIGER M., RAETZ S., BUKOWIECKI L., KITZE M., ERRMANN R., NOWAK G., NIEDZIELSKI A., POPOV V., MARKA C., GOZDZIEWSKI K., NEUHAEUSER R., OHLERT J., HINSE T.C., LEE J.W., LEE C.-U., YOON J.-N., BERNDT A., GILBERT H., GINSKI C., HOHLE M.M., MUGRAUER M., ROELL T., SCHMIDT T.O.B., TETZLAFF N., MANCINI L., SOUTHWORTH J., DALL'ORA M., CICERI S., ZAMBELLI R., CORFINI G., TAKAHASHI H., TACHIHARA K., BENKO J.M., SARNECZKY K., SZABO GY.M., VARGA T.N., VANKO M., JOSHI Y.C. and CHEN W.P.

Abstract (from CDS):

The transiting planet WASP-12 b was identified as a potential target for transit-timing studies because a departure from a linear ephemeris has been reported in the literature. Such deviations could be caused by an additional planet in the system. We attempt to confirm the claimed variations in transit timing and interpret their origin. We organised a multi-site campaign to observe transits by WASP-12 b in three observing seasons, using 0.5-2.6-metre telescopes. We obtained 61 transit light curves, many of them with sub-millimagnitude precision. The simultaneous analysis of the best-quality datasets allowed us to obtain refined system parameters, which agree with values reported in previous studies. The residuals versus a linear ephemeris reveal a possible periodic signal that may be approximated by a sinusoid with an amplitude of 0.00068±0.00013d and period of 500±20 orbital periods of WASP-12 b. The joint analysis of timing data and published radial velocity measurements results in a two-planet model that explains observations better than do single-planet scenarios. We hypothesise that WASP-12 b might not be the only planet in the system, and there might be the additional 0.1MJup body on a 3.6-d eccentric orbit. A dynamical analysis indicates that the proposed two-planet system is stable on long timescales.

Abstract Copyright:

Journal keyword(s): planets and satellites: general - stars: individual: WASP-12 - planets and satellites: individual: WASP-12 b

VizieR on-line data: <Available at CDS (J/A+A/551/A108): w12data.dat>

CDS comments: The postulated planet WASP-12c (p.10) is not in Simbad.

Simbad objects: 9

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Number of rows : 9

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 WASP-12b Pl 06 30 32.7966788910 +29 40 20.266334158           G0 488 1
2 WASP-12 ** 06 30 32.7966788910 +29 40 20.266334158   12.14 11.57     G0V 210 2
3 HAT-P-13 * 08 39 31.8073600797 +47 21 07.275628863   11.15 10.42 10.40   G4 108 2
4 HAT-P-13b Pl 08 39 31.8073600797 +47 21 07.275628863           ~ 81 1
5 HAT-P-13c Pl 08 39 31.8073600797 +47 21 07.275628863           ~ 44 1
6 Qatar 2 * 13 50 37.4100427817 -06 48 14.419877691   14.0   13.45   K5V 42 1
7 KOI-87 PM* 19 16 52.1904191915 +47 53 03.947532134   11.5   11.70   G5 72 3
8 KOI-2937 Al* 19 37 59.2726236478 +46 41 22.952068619           ~ 103 1
9 HAT-P-17 PM* 21 38 08.7311406378 +30 29 19.445574063   11.33 10.38 10.24   G0 40 1

    Equat.    Gal    SGal    Ecl

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2019.12.06-01:46:05

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