Unveiling the physical and chemical conditions in the young disk around L1527

Abstract

Planets form in disks around young stars. The planet formation process may start when the protostar and disk are still deeply embedded within their infalling envelope. However, unlike more evolved protoplanetary disks, the physical and chemical structure of these young embedded disks are still poorly constrained. We have analyzed ALMA data for ${}^{13}$CO, C${}^{18}$O and N${}_2$D${}^{+}$ to constrain the temperature structure, one of the critical unknowns, in the disk around L1527. The spatial distribution of ${}^{13}$CO and C${}^{18}$O, together with the kinetic temperature derived from the optically thick ${}^{13}$CO emission and the non-detection of N${}_2$D${}^{+}$, suggest that this disk is warm enough ($\gtrsim$ 20 K) to prevent CO freeze-out.

To appear in "Astrochemistry VII -- Through the Cosmos from Galaxies to Planets", proceedings of the IAU Symposium No. 332, 2017, Puerto Varas, Chile. M. Cunningham, T. Millar and Y. Aikawa, eds. (3 pages, 2 figures)

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