ALMA Observations of the HD~110058 debris disk
Antonio S. Hales, Sebasti\'An Marino, Patrick D. Sheehan, Silvio, Ulloa, Sebasti\'An P\'Erez, Luca Matr\`A, Quentin Kral, Mark Wyatt, William, Dent, and John Carpenter

TL;DR
This paper presents high-resolution ALMA observations of the HD 110058 debris disk, revealing its small size, dust and gas distribution, and properties, with implications for its origin and dust dynamics.
Contribution
First detailed ALMA imaging and modeling of the HD 110058 debris disk, showing its small size, vertical thickness, and secondary gas origin.
Findings
Disk is the smallest around similar stars observed by ALMA.
Gas distribution is more compact than dust, suggesting low viscosity.
Gas and dust properties support a secondary origin scenario.
Abstract
We present Atacama Large Millimeter Array (ALMA) observations of the young, gas-rich debris disk around HD110058 at 0.3-0.6\arcsec resolution. The disk is detected in the 0.85 and 1.3~mm continuum, as well as in the J=2-1 and J=3-2 transitions of CO and CO. The observations resolve the dust and gas distributions and reveal that this is the smallest debris disk around stars of similar luminosity observed by ALMA. The new ALMA data confirm the disk is very close to edge-on, as shown previously in scattered light images. We use radiative transfer modeling to constrain the physical properties of dust and gas disks. The dust density peaks at around 31~au and has a smooth outer edge that extends out to ~au. Interestingly, the dust emission is marginally resolved along the minor axis, which indicates that it is vertically thick if truly close to edge-on with an aspect…
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Taxonomy
TopicsAstrophysics and Star Formation Studies · Stellar, planetary, and galactic studies · Astronomy and Astrophysical Research
