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  The VLA Nascent Disk and Multiplicity Survey of Perseus Protostars (VANDAM). V. 18 Candidate Disks around Class 0 and I Protostars in the Perseus Molecular Cloud

Segura-Cox, D. M., Looney, L. W., Tobin, J. J., Li, Z.-Y., Harris, R. J., Sadavoy, S., et al. (2018). The VLA Nascent Disk and Multiplicity Survey of Perseus Protostars (VANDAM). V. 18 Candidate Disks around Class 0 and I Protostars in the Perseus Molecular Cloud. The Astrophysical Journal, 866.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0005-CB28-A Version Permalink: https://hdl.handle.net/21.11116/0000-0005-CB29-9
Genre: Journal Article

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https://ui.adsabs.harvard.edu/abs/2018ApJ...866..161S (Any fulltext)
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 Creators:
Segura-Cox, Dominique M.1, Author
Looney, Leslie W.1, Author
Tobin, John J.1, Author
Li, Zhi-Yun1, Author
Harris, Robert J.1, Author
Sadavoy, Sarah1, Author
Dunham, Michael M.1, Author
Chandler, Claire1, Author
Kratter, Kaitlin1, Author
Pérez, Laura1, Author
Melis, Carl1, Author
Affiliations:
1Max Planck Institute for Astronomy, Max Planck Society and Cooperation Partners, ou_2421692              

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Free keywords: circumstellar matter protoplanetary disks stars: protostars Astrophysics - Solar and Stellar Astrophysics Astrophysics - Astrophysics of Galaxies
 Abstract: We present the full disk-fit results VANDAM survey of all Class 0 and I protostars in the Perseus molecular cloud. We have 18 new protostellar disk candidates around Class 0 and I sources, which are well described by a simple, parametrized disk model fit to the 8 mm VLA dust continuum observations. 33% of Class 0 protostars and just 11% of Class I protostars have candidate disks, while 78% of Class 0 and I protostars do not have signs of disks within our 12 au disk diameter resolution limit, indicating that at 8 mm most disks in the Class 0 and I phases are <10 au in radius. These small radii may be a result of surface brightness sensitivity limits. Modeled 8 mm radii are similar to the radii of known Class 0 disks with detected Keplerian rotation. Since our 8 mm data trace a population of larger dust grains that radially drift toward the protostar and are lower limits on true disk sizes, large disks at early times do not seem to be particularly rare. We find statistical evidence that Class 0 and I disks are likely drawn from the same distribution, meaning disk properties may be defined early in the Class 0 phase and do not undergo large changes through the Class I phase. By combining our candidate disk properties with previous polarization observations, we find a qualitative indication that misalignment between inferred envelope-scale magnetic fields and outflows may indicate disks on smaller scales in Class 0 sources.

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 Dates: 2018
 Publication Status: Issued
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Title: The Astrophysical Journal
Source Genre: Journal
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Pages: - Volume / Issue: 866 Sequence Number: - Start / End Page: - Identifier: -