Hot circumstellar material resolved around beta Pic with VLTI/PIONIER
dc.contributor.author | DEFRÈRE, D. | |
hal.structure.identifier | Institut de Planétologie et d'Astrophysique de Grenoble [IPAG ] | |
dc.contributor.author | LEBRETON, J. | |
hal.structure.identifier | Institut de Planétologie et d'Astrophysique de Grenoble [IPAG ] | |
dc.contributor.author | BOUQUIN, J. -B. Le | |
hal.structure.identifier | Institut de Planétologie et d'Astrophysique de Grenoble [IPAG ] | |
dc.contributor.author | LAGRANGE, A. -M. | |
hal.structure.identifier | Université de Liège | |
dc.contributor.author | ABSIL, O. | |
hal.structure.identifier | Institut de Planétologie et d'Astrophysique de Grenoble [IPAG ] | |
dc.contributor.author | AUGEREAU, J. -C. | |
hal.structure.identifier | European Southern Observatory [ESO] | |
dc.contributor.author | BERGER, J. -P. | |
hal.structure.identifier | AMOR 2012 | |
dc.contributor.author | DI FOLCO, E. | |
dc.contributor.author | ERTEL, S. | |
hal.structure.identifier | Institut de Planétologie et d'Astrophysique de Grenoble [IPAG ] | |
dc.contributor.author | KLUSKA, J. | |
hal.structure.identifier | European Southern Observatory [ESO] | |
dc.contributor.author | MONTAGNIER, G. | |
hal.structure.identifier | NASA ExoPlanet Science Institute [NExScI] | |
dc.contributor.author | MILLAN-GABET, R. | |
hal.structure.identifier | Jet Propulsion Laboratory [JPL] | |
dc.contributor.author | TRAUB, W. | |
hal.structure.identifier | Institut de Planétologie et d'Astrophysique de Grenoble [IPAG ] | |
dc.contributor.author | ZINS, G. | |
dc.date.created | 2012-10-08 | |
dc.date.issued | 2012 | |
dc.identifier.issn | 0004-6361 | |
dc.description.abstractEn | We aim at resolving the circumstellar environment around beta Pic in the near-infrared in order to study the inner planetary system (< 200 mas, i.e., ~4 AU). Precise interferometric fringe visibility measurements were obtained over seven spectral channels dispersed across the H band with the four-telescope VLTI/PIONIER interferometer. Thorough analysis of interferometric data was performed to measure the stellar angular diameter and to search for circumstellar material. We detected near-infrared circumstellar emission around beta Pic that accounts for 1.37% +/- 0.16% of the near-infrared stellar flux and that is located within the field-of-view of PIONIER (i.e., ~200 mas in radius). The flux ratio between this excess and the photosphere emission is shown to be stable over a period of 1 year and to vary only weakly across the H band, suggesting that the source is either very hot (> 1500 K) or dominated by the scattering of the stellar flux. In addition, we derived the limb-darkened angular diameter of beta Pic with an unprecedented accuracy (theta_LD= 0.736 +/- 0.019 mas). The presence of a small H-band excess originating in the vicinity of beta Pic is revealed for the first time thanks to the high-precision visibilities enabled by VLTI/PIONIER. This excess emission is likely due to the scattering of stellar light by circumstellar dust and/or the thermal emission from a yet unknown population of hot dust, although hot gas emitting in the continuum cannot be firmly excluded. | |
dc.language.iso | en | |
dc.publisher | EDP Sciences | |
dc.title.en | Hot circumstellar material resolved around beta Pic with VLTI/PIONIER | |
dc.type | Article de revue | |
dc.identifier.doi | 10.1051/0004-6361/201220287 | |
dc.subject.hal | Physique [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR] | |
dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Astrophysique stellaire et solaire [astro-ph.SR] | |
dc.subject.hal | Physique [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP] | |
dc.subject.hal | Planète et Univers [physics]/Astrophysique [astro-ph]/Planétologie et astrophysique de la terre [astro-ph.EP] | |
dc.identifier.arxiv | 1210.1914 | |
bordeaux.journal | Astronomy and Astrophysics - A&A | |
bordeaux.page | id.L9 | |
bordeaux.volume | 546 | |
bordeaux.peerReviewed | oui | |
hal.identifier | hal-00832266 | |
hal.version | 1 | |
hal.popular | non | |
hal.audience | Internationale | |
hal.origin.link | https://hal.archives-ouvertes.fr//hal-00832266v1 | |
bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Astronomy%20and%20Astrophysics%20-%20A&A&rft.date=2012&rft.volume=546&rft.spage=id.L9&rft.epage=id.L9&rft.eissn=0004-6361&rft.issn=0004-6361&rft.au=DEFR%C3%88RE,%20D.&LEBRETON,%20J.&BOUQUIN,%20J.%20-B.%20Le&LAGRANGE,%20A.%20-M.&ABSIL,%20O.&rft.genre=article |
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