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| DOI | 10.1093/MNRAS/STY2993 | ||||
| Año | 2019 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
One of the defining properties of debris discs compared to protoplanetary discs used to be their lack of gas, yet small amounts of gas have been found around an increasing number of debris discs in recent years. These debris discs found to have gas tend to be both young and bright. In this paper, we conduct a deep search for CO gas in the system HD 95086 - a 17 Myr old, known planet host that also has a debris disc with a high fractional luminosity of 1.5 x 10(-3). Using the Atacama Large Millimeter/submillimeter Array (ALMA), we search for CO emission lines in bands 3, 6, and 7. By implementing a spectro-spatial filtering technique, we find tentative evidence for COJ = 2-1 emission in the disc located at a velocity, 8.5 +/- 0.2 km s(-1), consistent with the radial velocity of the star. The tentative detection suggests that the gas on the east side of the disc is moving towards us. In the same region where continuum emission is detected, we find an integrated line flux of 9.5 +/- 3.6 mJy km s(-1), corresponding to a CO mass of (1.4-13) x 10(-6) M-circle plus. Our analysis confirms that the level of gas present in the disc is inconsistent with the presence of primordial gas in the system and is consistent with second generation production through the collisional cascade.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Booth, Mark | Hombre |
Friedrich Schiller Univ Jena - Alemania
Friedrich Schiller Universität Jena - Alemania Friedrich-Schiller-Universitat Jena - Alemania |
| 2 | Matra, Luca | Hombre |
Harvard Smithsonian Ctr Astrophys - Estados Unidos
Harvard-Smithsonian Center for Astrophysics - Estados Unidos |
| 3 | Su, Kate Y. L. | Mujer |
UNIV ARIZONA - Estados Unidos
Acad Sinica - Taiwán The University of Arizona - Estados Unidos Academia Sinica, Institute of Astronomy and Astrophysics - Taiwán |
| 4 | Kral, Q. | Hombre |
UNIV CAMBRIDGE - Reino Unido
Univ Paris Diderot - Francia Institute of Astronomy - Reino Unido LESIA - Laboratoire d'Etudes Spatiales et d'Instrumentation en Astrophysique - Francia Université PSL - Francia L'Observatoire de Paris - Francia |
| 5 | HALES-GEBRIM, ANTONIO SALVADOR | Hombre |
Atacama Large Millimeter Array - Chile
Natl Radio Astron Observ - Estados Unidos Atacama Large Millimeter-submillimeter Array - Chile National Radio Astronomy Observatory - Estados Unidos |
| 6 | Dent, William R. F. | Hombre |
Atacama Large Millimeter Array - Chile
Atacama Large Millimeter-submillimeter Array - Chile |
| 7 | Hughes, A. M. | - |
Wesleyan Univ - Estados Unidos
Wesleyan University Middletown - Estados Unidos |
| 8 | MacGregor, Meredith A. | Mujer |
Carnegie Inst Sci - Estados Unidos
Carnegie Institution of Washington - Estados Unidos |
| 9 | Loehne, Torsten | Hombre |
Friedrich Schiller Univ Jena - Alemania
Friedrich Schiller Universität Jena - Alemania Friedrich-Schiller-Universitat Jena - Alemania |
| 9 | Löhne, Torsten | Hombre |
Friedrich Schiller Universität Jena - Alemania
Friedrich Schiller Univ Jena - Alemania Friedrich-Schiller-Universitat Jena - Alemania |
| 10 | Wilner, David J. | Hombre |
Harvard Smithsonian Ctr Astrophys - Estados Unidos
Harvard-Smithsonian Center for Astrophysics - Estados Unidos |
| Fuente |
|---|
| National Science Foundation |
| Deutsche Forschungsgemeinschaft |
| Science and Technology Facilities Council |
| National Science Foundation (NSF) |
| NSF Astronomy and Astrophysics Postdoctoral Fellowship |
| ASIAA |
| Smithsonian Institution |
| National Rehabilitation Center |
| National Sleep Foundation |
| National Science Foundation operated |
| Alberta Livestock and Meat Agency |
| Korea Astronomy and Space Science Institute |
| National Radio Astronomy Observatory |
| National Institutes of Natural Sciences |
| European Southern Observatory |
| Array BioPharma |
| STFC via the Institute of Astronomy, Cambridge Consolidated Grant |
| Smith-sonian Institution |
| Directorate for Mathematical and Physical Sciences |
| Agradecimiento |
|---|
| The authors thank Steve Ertel, Sarah Morrison, and Renu Malhotra for providing comments on a draft of the manuscript and also thank the referee for a thorough and constructive review. MB acknowledges support from the Deutsche Forschungsgemeinschaft through project Kr 2164/15-1. LM acknowledges support from the Smithsonian Institution as a Submillimeter Array (SMA) Fellow. QK acknowledges support from STFC via the Institute of Astronomy, Cambridge Consolidated Grant. AMH acknowledges support from National Science Foundation (NSF) grant AST-1412647. MAM acknowledges support from an NSF Astronomy and Astrophysics Postdoctoral Fellowship under Award no. AST-1701406. TL acknowledges support from the Deutsche Forschungsgemeinschaft through project Lo 1715/2-1. |
| The authors thank Steve Ertel, Sarah Morrison, and Renu Malhotra for providing comments on a draft of the manuscript and also thank the referee for a thorough and constructive review. MB acknowledges support from the Deutsche Forschungsgemeinschaft through project Kr 2164/15-1. LM acknowledges support from the Smith-sonian Institution as a Submillimeter Array (SMA) Fellow. QK acknowledges support from STFC via the Institute of Astronomy, Cambridge Consolidated Grant. AMH acknowledges support from National Science Foundation (NSF) grant AST-1412647. MAM acknowledges support from an NSF Astronomy and Astrophysics Postdoctoral Fellowship under Award no. AST-1701406. TL acknowledges support from the Deutsche Forschungsgemeinschaft through project Lo 1715/2-1. This paper makes use of the following ALMA data: |