Navegar

Colección

Datos Estadísticas

Artículo

Bonfils, X.; Almenara, J.-M.; Cloutier, R.; Wünsche, A.; Astudillo-Defru, N.; Berta-Thompson, Z.; Bouchy, F.; Charbonneau, D.; Delfosse, X.; Díaz, R.F.; Dittmann, J.; Doyon, R.; Forveille, T.; Irwin, J.; Lovis, C.; Mayor, M.; Menou, K.; Murgas, F. (...) Udry, S. "Radial velocity follow-up of GJ1132 with HARPS: A precise mass for planet b and the discovery of a second planet" (2018) Astronomy and Astrophysics. 618
Estamos trabajando para incorporar este artículo al repositorio
Consulte el artículo en la página del editor
Consulte la política de Acceso Abierto del editor

Abstract:

The source GJ1132 is a nearby red dwarf known to host a transiting Earth-size planet. After its initial detection, we pursued an intense follow-up with the HARPS velocimeter. We now confirm the detection of GJ1132b with radial velocities alone. We refined its orbital parameters, and in particular, its mass (m b = 1.66 ± 0.23 M), density (ρ b = 6.3 ± 1.3 g cm -3 ), and eccentricity (e b < 0.22; 95%). We also detected at least one more planet in the system. GJ1132c is a super-Earth with period P c = 8.93 ± 0.01 days and minimum mass m c sini c = 2.64 ± 0.44 M. Receiving about 1.9 times more flux than Earth in our solar system, its equilibrium temperature is that of a temperate planet (T eq = 230-300 K for albedos A = 0.75 - 0.00), which places GJ1132c near the inner edge of the so-called habitable zone. Despite an a priori favorable orientation for the system, Spitzer observations reject most transit configurations, leaving a posterior probability <1% that GJ1132c transits. GJ1132(d) is a third signal with period P d = 177 ± 5 days attributed to either a planet candidate with minimum mass m d sin i d = 8.4 -2.5 +1.7 M or stellar activity. Its Doppler signal is the most powerful in our HARPS time series but appears on a timescale where either the stellar rotation or a magnetic cycle are viable alternatives to the planet hypothesis. On the one hand, the period is different than that measured for the stellar rotation (~125 days), and a Bayesian statistical analysis we performed with a Markov chain Monte Carlo and Gaussian processes demonstrates that the signal is better described by a Keplerian function than by correlated noise. On the other hand, periodograms of spectral indices sensitive to stellar activity show power excess at similar periods to that of this third signal, and radial velocity shifts induced by stellar activity can also match a Keplerian function. We, therefore, prefer to leave the status of GJ1132(d) undecided. © ESO 2018.

Registro:

Documento: Artículo
Título:Radial velocity follow-up of GJ1132 with HARPS: A precise mass for planet b and the discovery of a second planet
Autor:Bonfils, X.; Almenara, J.-M.; Cloutier, R.; Wünsche, A.; Astudillo-Defru, N.; Berta-Thompson, Z.; Bouchy, F.; Charbonneau, D.; Delfosse, X.; Díaz, R.F.; Dittmann, J.; Doyon, R.; Forveille, T.; Irwin, J.; Lovis, C.; Mayor, M.; Menou, K.; Murgas, F.; Newton, E.; Pepe, F.; Santos, N.C.; Udry, S.
Filiación:Université Grenoble Alpes, CNRS, IPAG, Grenoble, 38000, France
Observatoire de Genève, Université de Genève, 51 ch. des Maillettes, Sauverny, 1290, Switzerland
Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, M5S 3H4, Canada
Centre for Planetary Sciences, Department of Physical and Environmental Sciences, University of Toronto Scarborough, 1265 Military Trail, Toronto, M1C 1A4, Canada
Institut de Recherche sur les Exoplanètes, Département de Physique, Université de Montréal, CP 6128 Succ. Centre-ville, Montréal, H3C 3J7, Canada
Departamento de Astronomía, Universidad de Concepción, Casilla 160, Concepción, Chile
Department of Astrophysical and Planetary Sciences, University of Colorado, 2000 Colorado Ave., Boulder, CO 80305, United States
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, United States
Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, United States
Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
CONICET, Universidad de Buenos Aires, Instituto de Astronomía y Física Del Espacio (IAFE), Buenos Aires, Argentina
Instituto de Astrofísica e Ciências Do Espaço, Universidade Do Porto, CAUP, Rua das Estrelas, Porto, 4150-762, Portugal
Departamento de Física e Astronomia, Faculdade de Ciências, Universidade Do Porto, Rua do Campo Alegre, Porto, 4169-007, Portugal
Instituto de Astrof Ica de Canarias (IAC), La Laguna, Tenerife, 38200, Spain
Departamento de Astrofísica, Universidad de la Laguna (ULL), La Laguna, Tenerife, 38206, Spain
Palabras clave:Planetary systems; Stars: late-type; Techniques: radial velocities; Astrophysics; Markov processes; Orbits; Stars; Velocity; Equilibrium temperatures; Gaussian Processes; Markov Chain Monte-Carlo; Orbital parameters; Planetary system; Posterior probability; Stars:late type; Techniques: radial velocities; Earth (planet)
Año:2018
Volumen:618
DOI: http://dx.doi.org/10.1051/0004-6361/201731884
Título revista:Astronomy and Astrophysics
Título revista abreviado:Astron. Astrophys.
ISSN:00046361
CODEN:AAEJA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v618_n_p_Bonfils

Referencias:

  • Anglada-Escudé, G., Butler, R.P., (2012) Camb. Astrophys. Ser, 20, p. 15
  • Arlot, S., Celisse, A., (2010) Statist. Surv, 4, p. 40
  • Astudillo-Defru, N., Bonfils, X., Delfosse, X., (2015) A&A, 575, p. A119
  • Astudillo-Defru, N., Delfosse, X., Bonfils, X., (2017) A&A, 600, p. A13
  • Baranne, A., Queloz, D., Mayor, M., (1996) A&AS, 119, p. 373
  • Beatty, T.G., Seager, S., (2010) ApJ, 712, p. 1433
  • Berta-Thompson, Z.K., Irwin, J., Charbonneau, D., (2015) Nature, 527, p. 204
  • Boisse, I., Eggenberger, A., Santos, N.C., (2010) A&A, 523, p. A88
  • Bonfils, X., Mayor, M., Delfosse, X., (2007) A&A, 474, p. 293
  • Bonfils, X., Astudillo-Defru, N., Díaz, R., (2018) A&A, 613, p. A25
  • Bouchy, F., Pepe, F., Queloz, D., (2001) A&A, 374, p. 733
  • Cloutier, R., Astudillo-Defru, N., Doyon, R., (2017) A&A, 608, p. A35
  • Cloutier, R., Doyon, R., Menou, K., (2017) AJ, 153, p. 9
  • Delfosse, X., Donati, J.-F., Kouach, D., (2013) SF2A-2013: Proceedings of the Annual Meeting of the French Society of Astronomy and Astrophysics, 497. , ed., L. Cambresy
  • Dittmann, J.A., Irwin, J.M., Charbonneau, D., Berta-Thompson, Z.K., Newton, E.R., (2017) AJ, 154, p. 142
  • Dittmann, J.A., Irwin, J.M., Charbonneau, D., (2017) Nature, 544, p. 333
  • Donati, J.-F., Yu, L., Moutou, C., (2016) MNRAS, 465, p. 3343
  • Ford, E.B., (2006) ApJ, 642, p. 505
  • Foreman-Mackey, D., Conley, A., Meierjurgen Farr, W., (2013) Astrophysics Source Code Library, , [record ascl:1303.002]
  • Galland, F., Lagrange, A.M., Udry, S., (2006) A&A, 447, p. 355
  • Gillon, M., Bonfils, X., Demory, B.-O., (2011) A&A, 525, p. A32
  • Gillon, M., Triaud, A.H.M.J., Demory, B.-O., (2017) Nature, 542, p. 456
  • Gomes Da Silva, J., Santos, N.C., Bonfils, X., (2011) A&A, 534, p. A30
  • Goodman, J., Weare, J., (2010) Commun. Appl. Math. Comput. Sci, 5, p. 65
  • Haywood, R.D., Collier Cameron, A., Queloz, D., (2014) MNRAS, 443, p. 2517
  • Howarth, I.D., Siebert, K.W., Hussain, G.A.J., Prinja, R.K., (1997) MNRAS, 284, p. 265
  • Jontof-Hutter, D., Ford, E.B., Rowe, J.F., (2016) ApJ, 820, p. 39
  • Kopparapu, K.R., Wolf, E.T., Haqq-Misra, J., (2016) ApJ, 819, p. 84
  • Lissauer, J.J., Fabrycky, D.C., Ford, E.B., (2011) Nature, 470, p. 53
  • Lissauer, J.J., Jontof-Hutter, D., Rowe, J.F., (2013) ApJ, 770, p. 131
  • Lovis, C., Pepe, F., (2007) A&A, 468, p. 1115
  • Mayor, M., Pepe, F., Queloz, D., (2003) The Messenger, 114, p. 20
  • Morley, C.V., Kreidberg, L., Rustamkulov, Z., Robinson, T., Fortney, J.J., (2017) ApJ, 850, p. 121
  • Pepe, F., Mayor, M., Galland, F., (2002) A&A, 388, p. 632
  • Pepe, F., Mayor, M., Queloz, D., (2004) A&A, 423, p. 385
  • Press, W.H., Teukolsky, S.A., Vetterling, W.T., Flannery, B.P., (1992) Numerical Recipes, , (New York: Cambridge University Press)
  • Quirrenbach, A., Amado, P.J., Caballero, J.A., (2014) Proc. SPIE, 9147, p. 91471F
  • Rajpaul, V., Aigrain, S., Osborne, M.A., Reece, S., Roberts, S., (2015) MNRAS, 452, p. 2269
  • Rein, H., Liu, S.-F., (2011) Astrophysics Source Code Library, , [record ascl:1110.016]
  • Rein, H., Tamayo, D., (2015) MNRAS, 452, p. 376
  • Robertson, P., Mahadevan, S., Endl, M., Roy, A., (2014) Science, 345, p. 440
  • Rogers, L.A., (2015) ApJ, 801, p. 41
  • Sarkis, P., Henning, T., Kürster, M., (2018) AJ, 155, p. 257
  • Schaefer, L., Wordsworth, R.D., Berta-Thompson, Z., Sasselov, D., (2016) ApJ, 829, p. 63
  • Southworth, J., Mancini, L., Madhusudhan, N., (2017) AJ, 153, p. 191
  • Steffen, J.H., Fabrycky, D.C., Agol, E., (2013) MNRAS, 428, p. 1077
  • Xie, J.-W., (2014) APJS, 210, p. 25
  • Zechmeister, M., Kürster, M., (2009) A&A, 496, p. 577
  • Zeng, L., Sasselov, D., (2013) PASP, 125, p. 227

Citas:

---------- APA ----------
Bonfils, X., Almenara, J.-M., Cloutier, R., Wünsche, A., Astudillo-Defru, N., Berta-Thompson, Z., Bouchy, F.,..., Udry, S. (2018) . Radial velocity follow-up of GJ1132 with HARPS: A precise mass for planet b and the discovery of a second planet. Astronomy and Astrophysics, 618.
http://dx.doi.org/10.1051/0004-6361/201731884
---------- CHICAGO ----------
Bonfils, X., Almenara, J.-M., Cloutier, R., Wünsche, A., Astudillo-Defru, N., Berta-Thompson, Z., et al. "Radial velocity follow-up of GJ1132 with HARPS: A precise mass for planet b and the discovery of a second planet" . Astronomy and Astrophysics 618 (2018).
http://dx.doi.org/10.1051/0004-6361/201731884
---------- MLA ----------
Bonfils, X., Almenara, J.-M., Cloutier, R., Wünsche, A., Astudillo-Defru, N., Berta-Thompson, Z., et al. "Radial velocity follow-up of GJ1132 with HARPS: A precise mass for planet b and the discovery of a second planet" . Astronomy and Astrophysics, vol. 618, 2018.
http://dx.doi.org/10.1051/0004-6361/201731884
---------- VANCOUVER ----------
Bonfils, X., Almenara, J.-M., Cloutier, R., Wünsche, A., Astudillo-Defru, N., Berta-Thompson, Z., et al. Radial velocity follow-up of GJ1132 with HARPS: A precise mass for planet b and the discovery of a second planet. Astron. Astrophys. 2018;618.
http://dx.doi.org/10.1051/0004-6361/201731884