SIMBAD references

2013MNRAS.428..678T - Mon. Not. R. Astron. Soc., 428, 678-690 (2013/January-1)

Near-UV and optical observations of the transiting exoplanet TrES-3b.

TURNER J.D., SMART B.M., HARDEGREE-ULLMAN K.K., CARLETON T.M., WALKER-LAFOLLETTE A.M., CRAWFORD B.E., SMITH C.-T.W., McGRAW A.M., SMALL L.C., ROCCHETTO M., CUNNINGHAM K.I., TOWNER A.P.M., ZELLEM R., ROBERTSON A.N., GUVENEN B.C., SCHWARZ K.R., HARDEGREE-ULLMAN E.E., COLLURA D., HENZ T.N., LEJOLY C., RICHARDSON L.L., WEINAND M.A., TAYLOR J.M., DAUGHERTY M.J., WILSON A.A. and AUSTIN C.L.

Abstract (from CDS):

We observed nine primary transits of the hot Jpiter TrES-3b in several optical and near-UV photometric bands from 2009 June to 2012 April in an attempt to detect its magnetic field. Vidotto, Jardine and Helling suggest that the magnetic field of TrES-3b can be constrained if its near-UV light curve shows an early ingress compared to its optical light curve, while its egress remains unaffected. Predicted magnetic field strengths of Jpiter-like planets should range between 8 G and 30 G. Using these magnetic field values and an assumed B* of 100 G, the Vidotto et al. method predicts a timing difference of 5-11 min. We did not detect an early ingress in our three nights of near-UV observations, despite an average cadence of 68 s and an average photometric precision of 3.7 mmag. However, we determined an upper limit of TrES-3b's magnetic field strength to range between 0.013 and 1.3 G (for a 1-100 G magnetic field strength range for the host star, TrES-3) using a timing difference of 138 s derived from the Nyquist-Shannon sampling theorem. To verify our results of an abnormally small magnetic field strength for TrES-3b and to further constrain the techniques of Vidotto et al., we propose future observations of TrES-3b with other platforms capable of achieving a shorter near-UV cadence. We also present a refinement of the physical parameters of TrES-3b, an updated ephemeris and its first published near-UV light curve. We find that the near-UV planetary radius of Rp = 1.386+ 0.248- 0.144RJup is consistent with the planet's optical radius.

Abstract Copyright: © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2012)

Journal keyword(s): planets and satellites: individual: TrES-3b - techniques: photometric - planets and satellites: magnetic fields - planetary systems

VizieR on-line data: <Available at CDS (J/MNRAS/428/678): lc.dat>

Simbad objects: 8

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2023.01.27-16:18:50

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