2013A&A...559A..32N


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.04CEST15:18:15

2013A&A...559A..32N - Astronomy and Astrophysics, volume 559A, 32-32 (2013/11-1)

The blue sky of GJ 3470b: the atmosphere of a low-mass planet unveiled by ground-based photometry.

NASCIMBENI V., PIOTTO G., PAGANO I., SCANDARIATO G., SANI E. and FUMANA M.

Abstract (from CDS):

GJ3470b is a rare example of a ``hot Uranus'' transiting exoplanet orbiting a nearby M1.5 dwarf. It is crucial for atmospheric studies because it is one of the most inflated low-mass planets known, bridging the boundary between ``super-Earths'' and Neptunian planets. We present two new ground-based light curves of GJ3470b gathered by the LBC camera at the Large Binocular Telescope. Simultaneous photometry in the ultraviolet (λc=357.5nm) and optical infrared (λc=963.5nm) allowed us to detect a significant change in the effective radius of GJ3470b as a function of wavelength. This can be interpreted as a signature of scattering processes occurring in the planetary atmosphere, which should be cloud-free and with a low mean molecular weight. The unprecedented accuracy of our measurements demonstrates that the photometric detection of Earth-sized planets around M dwarfs is achievable using 8-10m size ground-based telescopes. We provide updated planetary parameters and a greatly improved orbital ephemeris for any forthcoming study of this planet.

Abstract Copyright:

Journal keyword(s): techniques: photometric - planetary systems - stars: individual: GJ3470

Status at CDS:   Associated data (images, light curves, etc...) being ingested in VizieR.

Simbad objects: 7

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Number of rows : 7

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 LP 424-4 PM* 07 59 05.8395618539 +15 23 29.240025256   13.5   11.934   M2.0Ve 70 1
2 NAME LP 424-4b Pl 07 59 05.8395618539 +15 23 29.240025256           ~ 153 1
3 Ross 905b Pl 11 42 11.0933874353 +26 42 23.658083337           ~ 591 1
4 HAT-P-26b Pl 14 12 37.5329989220 +04 03 36.117671696           ~ 99 1
5 NAME G 139-21b Pl 17 15 18.9337265994 +04 57 50.064695682           ~ 533 1
6 Kepler-10b Pl 19 02 43.0612302512 +50 14 28.700759378           ~ 244 1
7 Kepler-18d Pl 19 52 19.0688249829 +44 44 46.807526602           ~ 56 1

    Equat.    Gal    SGal    Ecl

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2020.07.04-15:18:15

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