DECaPS and SMA discovery of a highly-inclined class I YSO with an outflow: IRAS 08235-4316

Abstract

We present images of IRAS~08235--4316 with the Dark Energy Camera Plane Survey (DECaPS; spanning 0.398--1.034$\mu$m, at $\sim 1^{\prime \prime }$ resolution) and the Submillimeter Array (SMA; at 1.38\,mm/217\,GHz, at $\sim 1.9^{\prime \prime }\times 1.2^{\prime \prime }$ resolution), a YSO located in the Vela constellation near to the Puppis boundary, detected in a systematic search for new large/extended emission sources. The DECaPS data show an asymmetric bi--polar morphology with a large angular extent of $\sim 7.1^{\prime \prime }$ separated by a dark lane, characteristic of highly--inclined protoplanetary disks and less-evolved YSOs with outflows. The SMA data show an extended continuum structure along the optical dark lane with a smaller angular extent of $\sim 4.6^{\prime \prime }$. The detected ${}^{12}$CO J=2--1 emission tentatively shows a velocity gradient along the position angle of the dark lane/millimeter continuum, that may trace rotating gas. Additional ${}^{12}$CO emission is present which could trace infalling/outflowing gas, and/or a nearby gas cloud. We estimate a distance to IRAS~08235--4316 of at least $\sim 191$pc. Supported by additional SED modelling, we infer IRAS~08235--4316 to be a newly discovered class~I YSO with an outflow, host to an embedded protoplanetary disk, with a large millimeter radius of $\sim 440$\,au and dust mass $\gtrsim 11M_{\oplus }$.

Accepted for publication in AJ 14 pages (10 page paper), 6 figures