J/ApJ/726/L19 Gunn r photometry of WASP-30 (Anderson+, 2011)
WASP-30b: a 61 MJup brown dwarf transiting a V = 12, F8 star.
Anderson D.R., Collier Cameron A., Hellier C., Lendl M., Maxted P.F.L.,
Pollacco D., Queloz D., Smalley B., Smith A.M.S., Todd I., Triaud A.H.M.J.,
West R.G., Barros S.C.C., Enoch B., Gillon M., Lister T.A., Pepe F.,
Segransan D., Street R.A., Udry S.
<Astrophys. J., 726, L19 (2011)>
=2011ApJ...726L..19A 2011ApJ...726L..19A
ADC_Keywords: Binaries, eclipsing ; Photometry ; Stars, double and multiple
Keywords: binaries: eclipsing - brown dwarfs - stars: individual (WASP-30)
Abstract:
We report the discovery of a 61-Jupiter-mass brown dwarf (BD), which
transits its F8V host star, WASP-30, every 4.16 days. From a range of
age indicators we estimate the system age to be 1-2Gyr. We derive a
radius (0.89±0.02RJup) for the companion that is consistent with
that predicted (0.914RJup) by a model of a 1Gyr old, non-irradiated
BD with a dusty atmosphere. The location of WASP-30b in the minimum of
the mass-radius relation is consistent with the quantitative
prediction of Chabrier & Baraffe, thus confirming the theory.
Description:
WASP-30 is a V=11.9, F8V star located in Aquarius, on the border with
Cetus. A transit search (Collier Cameron et al. 2006MNRAS.373..799C 2006MNRAS.373..799C)
of WASP-South data from 2008 July to November found a strong, 4.16 day
periodicity. Further observations in 2009 with both WASP instruments
led to a total of 17612 usable photometric measurements (Figure 1).
To refine the system parameters, we obtained high signal-to-noise
transit photometry through a Gunn r filter with the Euler-Swiss
telescope on 2010 August 1.
Objects:
--------------------------------------------------------------
RA (2000) DE Designation(s) (Period)
--------------------------------------------------------------
23 53 38.03 -10 07 05.1 WASP 30 = TYC 5834-95-1 (P=4.156)
--------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 27 250 Euler photometry of WASP-30
--------------------------------------------------------------------------------
See also:
J/A+A/531/A60 : WASP-31b photometry and radial velocities (Anderson+, 2011)
J/ApJ/718/1353 : Light curve of the triple system NLTT 41135 (Irwin+, 2010)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.6 d BJD Baryocentric Julian Date (BJD-2450000)
13- 19 F7.5 --- RFlux Relative flux (in Gunn r filter)
21- 27 F7.5 --- e_RFlux The 1σ uncertainty in RFlux
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 17-Aug-2012