A Multi-wavelength Analysis of Dust and Gas in the SR 24S Transition Disk

Pinilla, P.; Pérez, L. M.; Andrews, S.; van der Marel, N.; van Dishoeck, E. F.; Ataiee, Sareh; Benisty, M.; Birnstiel, T.; Juhász, A.; Natta, A.; Ricci, L.; Testi, L. (2017). A Multi-wavelength Analysis of Dust and Gas in the SR 24S Transition Disk. Astrophysical journal, 839(2), p. 99. Institute of Physics Publishing IOP 10.3847/1538-4357/aa6973

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We present new Atacama Large Millimeter/sub-millimeter Array (ALMA) 1.3 mm continuum observations of the SR 24S transition disk with an angular resolution ≲0!18 (12 au radius). We perform a multi-wavelength investigation by combining new data with previous ALMA data at 0.45 mm. The visibilities and images of the continuum emission at the two wavelengths are well characterized by a ring-like emission. Visibility modeling finds that the ring-like emission is narrower at longer wavelengths, in good agreement with models of dust-trapping in pressure bumps, although there are complex residuals that suggest potentially asymmetric structures. The 0.45 mm emission has a shallower profile inside the central cavity than the 1.3 mm emission. In addition, we find that the ¹³CO and C¹⁸O (J = 2–1) emission peaks at the center of the continuum cavity. We do not detect either continuum or gas emission from the northern companion to this system (SR 24N), which is itself a binary system. The upper limit for the dust disk mass of SR 24N is ≲0.12 M⨁, which gives a disk mass ratio in dust between the two components of Mdust,SR24S/Mdust, SR 24N ≳ 840. The current ALMA observations may imply that either planets have already formed in the SR 24N disk or that dust growth to millimeter sizes is inhibited there and that only warm gas, as seen by rovibrational CO emission inside the truncation radii of the binary, is present.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences > Theoretical Astrophysics and Planetary Science (TAPS)
08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences
08 Faculty of Science > Physics Institute
08 Faculty of Science > Physics Institute > NCCR PlanetS

UniBE Contributor:

Ataiee, Sareh

Subjects:

500 Science
500 Science > 520 Astronomy
500 Science > 530 Physics

ISSN:

0004-637X

Publisher:

Institute of Physics Publishing IOP

Language:

English

Submitter:

Janine Jungo

Date Deposited:

18 Apr 2018 15:49

Last Modified:

18 Apr 2018 15:57

Publisher DOI:

10.3847/1538-4357/aa6973

BORIS DOI:

10.7892/boris.112686

URI:

https://boris.unibe.ch/id/eprint/112686

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