HD 172555: Detection of 63 μ m [OI] emission in a debris disc
Author
Rivière-Marichalar, Pablo; Barrado, David; Augereau, Jean Charles; Thi, Wing Fai; Roberge, Aki; Eiroa, Carlos; Montesinos, Benjamín; Meeus, Gwendolyn; Howard, Christian D.; Sandell, Göran H L; Duchêne, Gaspard G.; Dent, William; Lebreton, Jean Pierre; Mendigutía, I.; Huélamo, Nuria; Ménard, François C.; Pinte, ChristopheEntity
UAM. Departamento de Física TeóricaPublisher
ESODate
2012-10-22Citation
10.1051/0004-6361/201219745
Astronomy and Astrophysics 546 (2012): L8
ISSN
1432-0746 (online); 0004-6361 (print)DOI
10.1051/0004-6361/201219745Funded by
This research has been funded by Spanish grants AYA 2010-21161-C02-02, CDS2006-00070 and PRICIT-S2009/ESP-1496. J.-C. Augereau and J. Lebreton thank the ANR (contract ANR-2010 BLAN-0505-01, EXOZODI) and the CNES-PNP for financial support. C. Pinte, F. Menard and W.-F. Thi acknowledges funding from the EU FP7-2011 under Grant Agreement nr. 284405. G. Meeus is supported by RYC-2011-07920. G. Meeus, C. Eiroa, I. Mendigutía and B. Montesinos are partly supported by AYA-2011-26202. F.M. acknowledges support from the Millennium Science Initiative (Chilean Ministry of Economy), through grant ÒNucleus P10-022-FÓProject
info:eu-repo/grantAgreement/EC/FP7/284405Editor's Version
http://dx.doi.org/10.1051/0004-6361/201219745Subjects
Circumstellar matter; Kuiper belt; Line: Formation; Stars: Individual: HD 172555; Stars: Pre-main sequence; FísicaNote
Astronomy and Astrophysics 546 (2012): L8 Reproduced with permission from Astronomy & AstrophysicsRights
© 2012 ESO.Abstract
Context. HD 172555 is a young A7 star belonging to the β Pictoris moving group that harbours a debris disc. The Spitzer/IRS spectrum of the source showed mid-IR features such as silicates and glassy silica species, indicating the presence of a warm dust component with small grains, which places HD 172555 among the small group of debris discs with such properties. The IRS spectrum also shows a possible emission of SiO gas.
Aims. We aim to study the dust distribution in the circumstellar disc of HD 172555 and to asses the presence of gas in the debris disc.
Methods. As part of the GASPS open time key programme, we obtained Herschel/PACS photometric and spectroscopic observations of the source.We analysed PACS observations of HD 172555 and modelled the spectral energy distribution with a modified blackbody and the gas emission with a two-level population model with no collisional de-excitation.
Results. We report for the first time the detection of [OI] atomic gas emission at 63.18 μm in the HD 172555 circumstellar disc. We detect excesses due to circumstellar dust toward HD 172555 in the three photometric bands of PACS (70, 100, and 160 μm).We derive a large dust particle mass of (4.8 ± 0.6) × 10−4 M⊕ and an atomic oxygen mass of 2.5 × 10−2R2 M⊕, where R in AU is the separation between the star and the inner disc. Thus, most of the detected mass of the disc is in the gaseous phase
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Google Scholar:Rivière-Marichalar, Pablo
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Barrado, David
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Augereau, Jean Charles
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Thi, Wing Fai
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Roberge, Aki
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Eiroa, Carlos
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Montesinos, Benjamín
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Meeus, Gwendolyn
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Howard, Christian D.
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Sandell, Göran H L
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Duchêne, Gaspard G.
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Dent, William
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Lebreton, Jean Pierre
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Mendigutía, I.
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Huélamo, Nuria
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Ménard, François C.
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Pinte, Christophe
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