THE VLA NASCENT DISK and MULTIPLICITY SURVEY: FIRST LOOK at RESOLVED CANDIDATE DISKS AROUND CLASS 0 and i PROTOSTARS in the PERSEUS MOLECULAR CLOUD

Dominique M. Segura-Cox, Robert J. Harris, John J. Tobin, Leslie W. Looney, Zhi Yun Li, Claire Chandler, Kaitlin Kratter, Michael M. Dunham, Sarah Sadavoy, Laura Perez, Carl Melis

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Abstract

We present the first dust emission results toward a sample of seven protostellar disk candidates around Class 0 and I sources in the Perseus molecular cloud from the VLA Nascent Disk and Multiplicity (VANDAM) survey with ∼0.″05 or 12 AU resolution. To examine the surface brightness profiles of these sources, we fit the Ka-band 8 mm dust-continuum data in the u, v-plane to a simple, parametrized model based on the Shakura-Sunyaev disk model. The candidate disks are well-fit by a model with a disk-shaped profile and have masses consistent with known Class 0 and I disks. The inner-disk surface densities of the VANDAM candidate disks have shallower density profiles compared to disks around more evolved Class II systems. The best-fit model radii of the seven early-result candidate disks are Rc > 10 AU; at 8 mm, the radii reflect lower limits on the disk size since dust continuum emission is tied to grain size and large grains radially drift inwards. These relatively large disks, if confirmed kinematically, are inconsistent with theoretical models where the disk size is limited by strong magnetic braking to <10 AU at early times.

Original languageEnglish (US)
Article numberL14
JournalAstrophysical Journal Letters
Volume817
Issue number2
DOIs
StatePublished - Feb 1 2016

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Keywords

  • protoplanetary disks
  • stars: protostars

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Segura-Cox, D. M., Harris, R. J., Tobin, J. J., Looney, L. W., Li, Z. Y., Chandler, C., Kratter, K., Dunham, M. M., Sadavoy, S., Perez, L., & Melis, C. (2016). THE VLA NASCENT DISK and MULTIPLICITY SURVEY: FIRST LOOK at RESOLVED CANDIDATE DISKS AROUND CLASS 0 and i PROTOSTARS in the PERSEUS MOLECULAR CLOUD. Astrophysical Journal Letters, 817(2), [L14]. https://doi.org/10.3847/2041-8205/817/2/L14