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The Ophiuchus DIsk Survey Employing ALMA (ODISEA): Complete Size Distributions for the 100 Brightest Disks Across Multiplicity and SED Classes by Dasgupta, Anuroop; Cieza, Lucas A.; Ruilova, Camilo I. Gonzalez; Bhowmik, Trisha; Chavan, Ms. Prachi; Batalla-Falcon, Grace; Herczeg, Gregory J.; Ruiz-Rodriguez, Dary A.; Williams, Jonathan P.; Sierra, Anibal; Casassus, Simon; Guilera, Octavio M.; Perez, Sebastian; Orcajo, Santiago; Nogueira, P. H; Hales, Antonio S.; Miley, James M.; Rannou, Fernando R.; Zurlo, Alice is a scholarly article available to read on EtoBox.

What is The Ophiuchus DIsk Survey Employing ALMA (ODISEA): Complete Size Distributions for the 100 Brightest Disks Across Multiplicity and SED Classes about?

The size of a protoplanetary disk is a fundamental property, yet most remain unresolved, even in nearby star-forming regions (d $\sim$ 140-200 pc). We present the complete continuum size distribution for the $105$ brightest protoplanetary disks (M$_{\text{dust}}$ $\gtrsim$ 2 M$_{\oplus}$) in the Ophiuchus cloud, obtained from ALMA Band 8 (410 GHz) observations at 0.05$^{\prime\prime}$ (7 au) to 0.15$^{\prime\prime}$ (21 au) resolution. This sample includes 54 Class II and 51 Class I and Flat Spectrum sources, providing a comprehensive distribution across evolutionary stages. We measure the Half Width at Half Maximum (HWHM) and the radius encircling $68\%$ of the flux ($R_{68\%}$) for most non-binary disks, yielding the largest flux-limited sample of resolved disks in any star-forming region. The distribution is log-normal with a median value of $\sim$14 au and a logarithmic standard deviation $\sigma_{\log} = 0.46$ (factor of 2.9 in linear scale). Disks in close binary systems ($<$ 200 au separation) have smaller radii, with median value of $\sim$5 au, indicating efficient radial drift as predicted by dust evolution models. The size distribution for young embedded objects (SED Clas

Author

Dasgupta, Anuroop; Cieza, Lucas A.; Ruilova, Camilo I. Gonzalez; Bhowmik, Trisha; Chavan, Ms. Prachi; Batalla-Falcon, Grace; Herczeg, Gregory J.; Ruiz-Rodriguez, Dary A.; Williams, Jonathan P.; Sierra, Anibal; Casassus, Simon; Guilera, Octavio M.; Perez, Sebastian; Orcajo, Santiago; Nogueira, P. H; Hales, Antonio S.; Miley, James M.; Rannou, Fernando R.; Zurlo, Alice

Published

2025

Language

EN