MagAO IMAGING OF LONG-PERIOD OBJECTS (MILO). I. A BENCHMARK M DWARF COMPANION EXCITING A MASSIVE PLANET AROUND THE SUN-LIKE STAR HD 7449

Vista sencilla de ítem
dc.contributor.authorRodigas, T.J.
dc.contributor.authorArriagada, P.
dc.contributor.authorFaherty, J.
dc.contributor.authorAnglada-Escudé, G.
dc.contributor.authorKaib, N.
dc.contributor.authorButler, R.P.
dc.contributor.authorShectman, S.
dc.contributor.authorWeinberger, A.
dc.contributor.authorMales, J.R.
dc.contributor.authorMorzinski, K.M.
dc.contributor.authorClose, L.M.
dc.contributor.authorHinz, P.M.
dc.contributor.authorCrane, J.D.
dc.contributor.authorThompson, I.
dc.contributor.authorTeske, J.
dc.contributor.authorDiaz, M.
dc.contributor.authorMinniti, D.
dc.contributor.authorLopez-Morales, M.
dc.contributor.authorAdams, F.C.
dc.contributor.authorBoss, A.P.
dc.date.accessioned2017-08-18T17:51:49Z
dc.date.available2017-08-18T17:51:49Z
dc.date.issued2016-02
dc.descriptionIndexación: Web of Science; Scopus.es_CL
dc.description.abstractWe present high-contrast Magellan adaptive optics images of HD 7449, a Sun-like star with one planet and a long-term radial velocity (RV) trend. We unambiguously detect the source of the long-term trend from 0.6-2.15 mu m. at a separation of similar to 0.'' 54. We use the object's colors and spectral energy distribution to show that it is most likely an M4-M5 dwarf (mass similar to 0.1-0.2 M-circle dot) at the same distance as the primary and is therefore likely bound. We also present new RVs measured with the Magellan/MIKE and Planet Finder Spectrograph spectrometers and compile these with archival data from CORALIE and HARPS. We use a new Markov chain Monte Carlo procedure to constrain both the mass (>0.17 M-circle dot at 99% confidence) and semimajor axis (similar to 18 AU) of the M dwarf companion (HD 7449B). We also refine the parameters of the known massive planet (HD 7449Ab), finding that its minimum mass is 1.09(-0.19)(+0.52) M-J, its semimajor axis is 2.33(-0.02)(+0.01) AU, and its eccentricity is 0.8(-0.06)(+0.08). We use N-body simulations to constrain the eccentricity of HD 7449B to less than or similar to 0.5. The M dwarf may be inducing Kozai oscillations on the planet, explaining its high eccentricity. If this is the case and its orbit was initially circular, the mass of the planet would need to be less than or similar to 1.5 M-J. This demonstrates that strong constraints on known planets can be made using direct observations of otherwise undetectable long-period companions.es_CL
dc.description.urihttp://iopscience.iop.org/article/10.3847/0004-637X/818/2/106/meta;jsessionid=ACDA0BFAAC15A234DEE820006E016D23.ip-10-40-1-105
dc.identifier.citationThe Astrophysical Journal, Volume 818, Number 2es_CL
dc.identifier.issn0004-637X
dc.identifier.otherDOI: 10.3847/0004-637X/818/2/106
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/3975
dc.language.isoenes_CL
dc.publisherIOP PUBLISHINGes_CL
dc.subjectBinaries: generales_CL
dc.subjectInstrumentation: adaptive opticses_CL
dc.subjectPlanetary systemses_CL
dc.subjectStars: individual (HD 7449)es_CL
dc.subjectTechniques: high angular resolutiones_CL
dc.subjectTtechniques: radial velocitieses_CL
dc.titleMagAO IMAGING OF LONG-PERIOD OBJECTS (MILO). I. A BENCHMARK M DWARF COMPANION EXCITING A MASSIVE PLANET AROUND THE SUN-LIKE STAR HD 7449es_CL
dc.typeArtículoes_CL
Archivos
Bloque original
Mostrando 1 - 1 de 1
Miniatura
Nombre:
Rodigas_T_MagAO_IMAGING_OF_LONG-PERIOD.pdf
Tamaño:
2.18 MB
Formato:
Adobe Portable Document Format
Descripción:
TEXTO COMPLETO INGLES
Descargar
Bloque de licencias
Mostrando 1 - 1 de 1
No hay miniatura disponible
Nombre:
license.txt
Tamaño:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descripción:
Descargar
Colecciones
FCE - Artículos de Revista