Artículo
Petrucci, R.; Jofré, E.; Ferrero, L.V.; Cúneo, V.; Saker, L.; Lovos, F.; Gómez, M.; Mauas, P. "A search for transit timing variations and orbital decay in WASP-46b" (2018) Monthly Notices of the Royal Astronomical Society. 473(4):5126-5141
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Abstract:
We present 12 new transit observations of the exoplanet WASP-46b obtained with the 1.54-m telescope at Estación Astrofísica 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 (eT0) < 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, our interpretation 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 meanmotion 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 of Q* > 7 × 103 on the tidal quality factor and determine that an additional 6 yr baseline is required to rule out Q* < 105. © 2016 The Authors.
Registro:
| Documento: | Artículo |
| Título: | A search for transit timing variations and orbital decay in WASP-46b |
| Autor: | Petrucci, R.; Jofré, E.; Ferrero, L.V.; Cúneo, V.; Saker, L.; Lovos, F.; Gómez, M.; Mauas, P. |
| Filiación: | Universidad Nacional de Córdoba, Observatorio Astronómico, Laprida 854, Córdoba, X5000BGR, Argentina Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina Instituto de Astronomía y Física del Espacio (IAFE, CONICET-UBA), Av. Inte. Güiraldes 2620, Buenos Aires, C1428ZAA, Argentina |
| Palabras clave: | Planets and satellites: individual: WASP-46b; Stars: individual: WASP-46; Techniques: photometric |
| Año: | 2018 |
| Volumen: | 473 |
| Número: | 4 |
| Página de inicio: | 5126 |
| Página de fin: | 5141 |
| DOI: | http://dx.doi.org/10.1093/MNRAS/STX2647 |
| Título revista: | Monthly Notices of the Royal Astronomical Society |
| Título revista abreviado: | Mon. Not. R. Astron. Soc. |
| ISSN: | 00358711 |
| CODEN: | MNRAA |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00358711_v473_n4_p5126_Petrucci |
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Citas:
---------- APA ----------
Petrucci, R., Jofré, E., Ferrero, L.V., Cúneo, V., Saker, L., Lovos, F., Gómez, M.,..., Mauas, P. (2018) . A search for transit timing variations and orbital decay in WASP-46b. Monthly Notices of the Royal Astronomical Society, 473(4), 5126-5141.http://dx.doi.org/10.1093/MNRAS/STX2647
---------- CHICAGO ----------
Petrucci, R., Jofré, E., Ferrero, L.V., Cúneo, V., Saker, L., Lovos, F., et al. "A search for transit timing variations and orbital decay in WASP-46b" . Monthly Notices of the Royal Astronomical Society 473, no. 4 (2018) : 5126-5141.http://dx.doi.org/10.1093/MNRAS/STX2647
---------- MLA ----------
Petrucci, R., Jofré, E., Ferrero, L.V., Cúneo, V., Saker, L., Lovos, F., et al. "A search for transit timing variations and orbital decay in WASP-46b" . Monthly Notices of the Royal Astronomical Society, vol. 473, no. 4, 2018, pp. 5126-5141.http://dx.doi.org/10.1093/MNRAS/STX2647
---------- VANCOUVER ----------
Petrucci, R., Jofré, E., Ferrero, L.V., Cúneo, V., Saker, L., Lovos, F., et al. A search for transit timing variations and orbital decay in WASP-46b. Mon. Not. R. Astron. Soc. 2018;473(4):5126-5141.http://dx.doi.org/10.1093/MNRAS/STX2647
