I Congreso de Postgrado fcfm: ingeniería, ciencias e innovación

30 Santiago, 10 al 12 de agosto, 2022 A S T RONOM Í A 01 RESOLVED CARBON MONOXIDE OBSERVATIONS OF PROTOPLANETARY DISKS IN OPHIUCHUS Juanita Antilen Romero¹ * ¹Departamento de Astronomí , Univers dad de Chile, Casilla 36-D, Santiago, Chile. *Email: jantilen@das.uchile.cl ABSTRACT The ¹²CO rotational lines in protoplanetary disks are good tracers of the total spatial extension of the gas com - ponent, and potentially planet-disk interactions. I present ALMA long baseline observations of the ¹²CO(2-1) line of ten protoplanetary disks from the “Ophiuchus DIsc Survey Employing ALMA” (ODISEA) project, aiming to get new constraints on the gas distribution of these sources that lie in different evolutionary stages. We compared the spatial extent of the CO(2-1) emission with the continuum, reported in a previous article. The disk orientations, and especially their position angle, can be inferred for five sources using high-velocity channels, which can be compared to the orientation of the continuum. We find a significant difference in orientation for one source, which is evidence of a tilted inner disk, and a slight misalignment of the components of one disk. Our observations also point out a possible outf low. One disk is not detected in ¹²CO, except for the compact signal inside its dust cavity. Besides, eight disks in our sample show evidence of gas inside dust cavities. ACKNOWLEDGEMENTS Proyecto FONDECYT 1211496 REFERENCES [1] Cieza, L. A., “The Ophiuchus DIsc Survey Employing ALMA (ODISEA) - I: project description and continuum images at 28 au resolution”, <i>Monthly Notices of the Royal Astronomical Society</i>, vol. 482, no. 1, pp. 698–714 (2019). doi:10.1093/mnras/sty2653. [2] Cieza, L. A., “The Ophiuchus DIsc Survey Employing ALMA (ODISEA) - III. The evolution of substructures in massive discs at 3-5 au resolution”, Monthly Notices of the Royal Astronomical Society, vol. 501, no. 2, pp. 2934–2953 (2021). doi:10.1093/mnras/staa3787.