Artículo
A search for transit timing variations and orbital decay in WASP-46b
Petrucci, Romina Paola
; Jofre, Jorge Emiliano
; Ferrero, Leticia Virginia
; Cuneo, Virginia
; Saker, Leila Yamila
; Lovos, Flavia Virginia
; Gomez, Mercedes Nieves
; Mauas, Pablo Jacobo David
Fecha de publicación:
02/2018
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Monthly Notices of the Royal Astronomical Society
ISSN:
0035-8711
e-ISSN:
1365-2966
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We present 12 new transit observations of the exoplanet WASP-46b obtained with the 1.54-m telescope at Estación Astrofı́sica de Bosque Alegre (EABA, Argentina) and the 0.40-m Horacio Ghielmetti and 2.15-m Jorge Sahade telescopes at Complejo Astronómico El Leoncito (CASLEO, Argentina). We analyse them together with 37 light curves from the literature to re-determine the physical parameters and search for additional planets via transit timing variations (TTVs). We consider the 31 transits with uncertainties in their mid-transit times (e_T0) < 1 min, to perform the first homogeneous study of TTVs for the system, finding a dispersion of σ = 1.66 min over a 6 yr baseline. Since no periodic variations are found, ourinterpretation for this relatively high value of σ is that the stellar activity could be affecting the measured mid-transit times. This value of dispersion allows us to rule out the presence of additional bodies with masses larger than 2.3, 4.6, 7 and 9.3 M⊕ at the first-order mean-motion resonances 2:1, 3:2, 4:3 and 5:4 with the transiting planet, respectively. Despite the 6 yr baseline and a typical light-curve precision of 2 × 10^(−3), we find that we cannot significantly demonstrate a slow decrease of the orbital period of WASP-46b. We place a lower limit ofQ* > 7 × 10^(3) on the tidal quality factor and determine that an additional 6 yr baseline is required to rule out Q* < 10^(5).
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - CORDOBA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - CORDOBA
Articulos(IAFE)
Articulos de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)
Articulos de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)
Articulos(IAR)
Articulos de INST.ARG.DE RADIOASTRONOMIA (I)
Articulos de INST.ARG.DE RADIOASTRONOMIA (I)
Citación
Petrucci, Romina Paola; Jofre, Jorge Emiliano; Ferrero, Leticia Virginia; Cuneo, Virginia; Saker, Leila Yamila; et al.; A search for transit timing variations and orbital decay in WASP-46b; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 473; 4; 2-2018; 5126-5141
Compartir
Altmétricas