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Gas Accretion withi...
Gas Accretion within the Dust Cavity in AB Aur
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- Riviere-Marichalar, Pablo (författare)
- Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN)
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- Fuente, Asuncion (författare)
- Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN)
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- Baruteau, Clement (författare)
- Centre national de la recherche scientifique (CNRS)
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- Neri, Roberto (författare)
- Institut de Radioastronomie Millimétrique (IRAM)
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- Treviño Morales, Sandra, 1985 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Carmona, Andres (författare)
- Centre national de la recherche scientifique (CNRS)
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- Agundez, Marcelino (författare)
- Agencia Estatal Consejo Superior de Investigaciones Científicas,Spanish National Research Council
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- Bachiller, Rafael (författare)
- Observatorio Astronómico Nacional (OAN),Spanish National Observatory (OAN)
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(creator_code:org_t)
- 2019-07-02
- 2019
- Engelska.
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Ingår i: Astrophysical Journal Letters. - : American Astronomical Society. - 2041-8213 .- 2041-8205. ; 879:1
- Relaterad länk:
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https://iopscience.i...
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https://research.cha...
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https://doi.org/10.3...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- AB Aur is a Herbig Ae star hosting a well-known transitional disk. Because of its proximity and low inclination angle, it is an excellent object to study planet formation. Our goal is to investigate the chemistry and dynamics of the molecular gas component in the AB Aur disk, and its relation with the prominent horseshoe shape observed in continuum mm emission. We used the Northern Extended Milimeter Array interferometer to map with high angular resolution the J = 3-2 lines of HCO+ and HCN. By combining both, we can gain insight into the AB Aur disk structure. Chemical segregation is observed in the AB Aur disk: HCO+ shows intense emission toward the star position, at least one bright molecular bridge within the dust cavity, and ring-like emission at larger radii, while HCN is only detected in an annular ring that is coincident with the dust ring and presents an intense peak close to the dust trap. We use HCO+ to investigate the gas dynamics inside the cavity. The observed bright HCO+ bridge connects the compact central source with the outer dusty ring. This bridge can be interpreted as an accretion flow from the outer ring to the inner disk/jet system proving gas accretion through the cavity.
Ämnesord
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- disk interactions
- planet
- planets and satellites: formation
- circumstellar matter
- protoplanetary disks
- stars: individual (AB Auriga)
- stars: pre-main sequence
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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