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Evidence for a correlation between mass accretion rates onto young stars and the mass of their protoplanetary disks

Manara, C. F. and Rosotti, G. and Testi, L. and Natta, A. and Alcalá, J. M. and Williams, J. P. and Ansdell, M. and Miotello, A. and van der Marel, N. and Tazzari, M. and Carpenter, J. and Guidi, G. and Mathews, G. S. and Oliveira, I. and Prusti, T. and van Dishoeck, E. F. (2016) Evidence for a correlation between mass accretion rates onto young stars and the mass of their protoplanetary disks. Astronomy & Astrophysics, 591 . Art. No. L3. ISSN 0004-6361. http://resolver.caltech.edu/CaltechAUTHORS:20160804-080809107

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Abstract

A relation between the mass accretion rate onto the central young star and the mass of the surrounding protoplanetary disk has long been theoretically predicted and observationally sought. For the first time, we have accurately and homogeneously determined the photospheric parameters, mass accretion rate, and disk mass for an essentially complete sample of young stars with disks in the Lupus clouds. Our work combines the results of surveys conducted with VLT/X-Shooter and ALMA. With this dataset we are able to test a basic prediction of viscous accretion theory, the existence of a linear relation between the mass accretion rate onto the central star and the total disk mass. We find a correlation between the mass accretion rate and the disk dust mass, with a ratio that is roughly consistent with the expected viscous timescale when assuming an interstellar medium gas-to-dust ratio. This confirms that mass accretion rates are related to the properties of the outer disk. We find no correlation between mass accretion rates and the disk mass measured by CO isotopologues emission lines, possibly owing to the small number of measured disk gas masses. This suggests that the mm-sized dust mass better traces the total disk mass and that masses derived from CO may be underestimated, at least in some cases.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1051/0004-6361/201628549 DOIArticle
http://www.aanda.org/articles/aa/abs/2016/07/aa28549-16/aa28549-16.htmlPublisherArticle
ORCID:
AuthorORCID
Ansdell, M.0000-0003-4142-9842
van Dishoeck, E. F.0000-0001-7591-1907
Additional Information:© 2016 ESO. Received 18 March 2016. Accepted 18 May 2016. We thank Cathie Clarke and Phil Armitage for insightful discussions. We thank the anonymous referee for insightful comments that helped to improve the presentation of the results. C.F.M. gratefully acknowledges an ESA Research Fellowship. G.R. is supported by the DISCSIM project, grant agreement 341137 funded by the European Research Council under ERC-2013-ADG. A.N. would like to acknowledge funding from Science Foundation Ireland (Grant 13/ERC/I2907). Leiden is supported by the European Union A-ERC grant 291141 CHEMPLAN, by the Netherlands Research School for Astronomy (NOVA), and by grant 614.001.352 from the Netherlands Organization for Scientific Research (NWO). JPW and MA were supported by NSF and NASA grants AST-1208911 and NNX15AC92G.
Group:Infrared Processing and Analysis Center (IPAC)
Funders:
Funding AgencyGrant Number
European Research Council (ERC)341137
Science Foundation, Ireland13/ERC/I2907
European Research Council (ERC)291141 CHEMPLAN
Nederlandse Onderzoekschool voor de Astronomie (NOVA)UNSPECIFIED
Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)614.001.352
NSFAST-1208911
NASANNX15AC92G
European Space Agency (ESA)UNSPECIFIED
Subject Keywords:accretion, accretion disks, protoplanetary disks, stars: pre-main sequence, stars: variables: T Tauri
Record Number:CaltechAUTHORS:20160804-080809107
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20160804-080809107
Official Citation:Evidence for a correlation between mass accretion rates onto young stars and the mass of their protoplanetary disks C. F. Manara, G. Rosotti, L. Testi, A. Natta, J. M. Alcalá, J. P. Williams, M. Ansdell, A. Miotello, N. van der Marel, M. Tazzari, J. Carpenter, G. Guidi, G. S. Mathews, I. Oliveira, T. Prusti and E. F. van Dishoeck A&A, 591 (2016) L3 DOI: http://dx.doi.org/10.1051/0004-6361/201628549
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:69429
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:04 Aug 2016 21:45
Last Modified:28 Nov 2017 17:38

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