2012ApJ...746..123H

Query : 2012ApJ...746..123H

2012ApJ...746..123H - Astrophys. J., 746, 123 (2012/February-3)

Kepler-21b: a 1.6 REarth planet transiting the bright oscillating f subgiant star HD 179070.

HOWELL S.B., ROWE J.F., BRYSON S.T., QUINN S.N., MARCY G.W., ISAACSON H., CIARDI D.R., CHAPLIN W.J., METCALFE T.S., MONTEIRO M.J.P.F.G., APPOURCHAUX T., BASU S., CREEVEY O.L., GILLILAND R.L., QUIRION P.-O., STELLO D., KJELDSEN H., CHRISTENSEN-DALSGAARD J., ELSWORTH Y., GARCIA R.A., HOUDEK G., KAROFF C., MOLENDA-ZAKOWICZ J., THOMPSON M.J., VERNER G.A., TORRES G., FRESSIN F., CREPP J.R., ADAMS E., DUPREE A., SASSELOV D.D., DRESSING C.D., BORUCKI W.J., KOCH D.G., LISSAUER J.J., LATHAM D.W., BUCHHAVE L.A., GAUTIER T.N., EVERETT M., HORCH E., BATALHA N.M., DUNHAM E.W., SZKODY P., SILVA D.R., MIGHELL K., HOLBERG J., BALLOT J., BEDDING T.R., BRUNTT H., CAMPANTE T.L., HANDBERG R., HEKKER S., HUBER D., MATHUR S., MOSSER B., REGULO C., WHITE T.R., CHRISTIANSEN J.L., MIDDOUR C.K., HAAS M.R., HALL J.R., JENKINS J.M., McCAULIFF S., FANELLI M.N., KULESA C., McCARTHY D. and HENZE C.E.

Abstract (from CDS):

We present Kepler observations of the bright (V = 8.3), oscillating star HD 179070. The observations show transit-like events which reveal that the star is orbited every 2.8 days by a small, 1.6 REarthobject. Seismic studies of HD 179070 using short cadence Kepler observations show that HD 179070 has a frequency-power spectrum consistent with solar-like oscillations that are acoustic p-modes. Asteroseismic analysis provides robust values for the mass and radius of HD 179070, 1.34±0.06 M☉ and 1.86±0.04 R ☉, respectively, as well as yielding an age of 2.84±0.34 Gyr for this F5 subgiant. Together with ground-based follow-up observations, analysis of the Kepler light curves and image data, and blend scenario models, we conservatively show at the >99.7% confidence level (3σ) that the transit event is caused by a 1.64±0.04 REarth exoplanet in a 2.785755±0.000032 day orbit. The exoplanet is only 0.04 AU away from the star and our spectroscopic observations provide an upper limit to its mass of ∼10 MEarth(2σ). HD 179070 is the brightest exoplanet host star yet discovered by Kepler.

Abstract Copyright: ∼

Journal keyword(s): planetary systems - stars: activity - stars: individual, HD 179070: KIC 3632418 - stars: interiors - stars: late-type - stars: magnetic field - stars: oscillations, including pulsations - techniques: photometric

Simbad objects: 2

goto Full paper

goto View the references in ADS

Number of rows : 2
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 HD 179070b Pl 19 09 26.8349590368 +38 42 50.455534860           ~ 76 1
2 HD 179070 Er* 19 09 26.8349590368 +38 42 50.455534860   8.767 8.25 8.00   F6IV 200 1

To bookmark this query, right click on this link: simbad:objects in 2012ApJ...746..123H and select 'bookmark this link' or equivalent in the popup menu