Data di Pubblicazione:
2023
Citazione:
Mapping Protoplanetary Disk Vertical Structure with CO Isotopologue Line Emission / C.J. Law, R. Teague, K.I. Öberg, E.A. Rich, S.M. Andrews, J. Bae, M. Benisty, S. Facchini, K. Flaherty, A. Isella, S. Jin, J. Hashimoto, J. Huang, R.A. Loomis, F. Long, C.E. Muñoz-Romero, T. Paneque-Carreño, L.M. Pérez, C. Qi, K.R. Schwarz, J. Stadler, T. Tsukagoshi, D.J. Wilner, G. van der Plas. - In: THE ASTROPHYSICAL JOURNAL. - ISSN 0004-637X. - 948:1(2023), pp. 60.1-60.25. [10.3847/1538-4357/acb3c4]
Abstract:
High-spatial-resolution observations of CO isotopologue line emission in protoplanetary disks at mid-
inclinations (≈30°–75°) allow us to characterize the gas structure in detail, including radial and vertical
substructures, emission surface heights and their dependencies on source characteristics, and disk temperature
profiles. By combining observations of a suite of CO isotopologues, we can map the two-dimensional (r, z) disk
structure from the disk upper atmosphere, as traced by CO, to near the midplane, as probed by less abundant
isotopologues. Here, we present high-angular-resolution (0 1 to ≈0 2; ≈15–30 au) observations of CO, 13 CO,
and C18 O in either or both J = 2–1 and J = 3–2 lines in the transition disks around DM Tau, Sz 91, LkCa 15, and
HD 34282. We derived line emission surfaces in CO for all disks and in 13 CO for the DM Tau and LkCa 15 disks.
With these observations, we do not resolve the vertical structure of C 18
O in any disk, which is instead consistent
with C18 O emission originating from the midplane. Both the J = 2–1 and J = 3–2 lines show similar heights. Using
the derived emission surfaces, we computed radial and vertical gas temperature distributions for each disk,
including empirical temperature models for the DM Tau and LkCa 15 disks. After combining our sample with
literature sources, we find that 13 CO line emitting heights are also tentatively linked with source characteristics,
e.g., stellar host mass, gas temperature, disk size, and show steeper trends than seen in CO emission surfaces.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
C.J. Law, R. Teague, K.I. Öberg, E.A. Rich, S.M. Andrews, J. Bae, M. Benisty, S. Facchini, K. Flaherty, A. Isella, S. Jin, J. Hashimoto, J. Huang, R.A. Loomis, F. Long, C.E. Muñoz-Romero, T. Paneque-Carreño, L.M. Pérez, C. Qi, K.R. Schwarz, J. Stadler, T. Tsukagoshi, D.J. Wilner, G. van der Plas
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