2019A&A...626L...2F


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST03:13:28

2019A&A...626L...2F - Astronomy and Astrophysics, volume 626, L2-2 (2019/6-1)

High gas-to-dust size ratio indicating efficient radial drift in the mm-faint CX Tauri disk.

FACCHINI S., VAN DISHOECK E.F., MANARA C.F., TAZZARI M., MAUD L., CAZZOLETTI P., ROSOTTI G., VAN DER MAREL N., PINILLA P. and CLARKE C.J.

Abstract (from CDS):

The large majority of protoplanetary disks have very compact continuum emission (≤15AU) at millimeter wavelengths. However, high angular resolution observations that resolve these small disks are still lacking, due to their intrinsically fainter emission compared with large bright disks. In this Letter we present 1.3 mm ALMA data of the faint disk (∼10mJy) orbiting the TTauri star CX Tau at a resolution of ∼40mas, ∼5AU in diameter. The millimeter dust disk is compact, with a 68% enclosing flux radius of 14AU, and the intensity profile exhibits a sharp drop between 10 and 20AU, and a shallow tail between 20 and 40AU. No clear signatures of substructure in the dust continuum are observed, down to the same sensitivity level of the DSHARP large program. However, the angular resolution does not allow us to detect substructures on the scale of the disk aspect ratio in the inner regions. The radial intensity profile closely resembles the inner regions of more extended disks imaged at the same resolution in DSHARP, but with no rings present in the outer disk. No inner cavity is detected, even though the disk has been classified as a transition disk from the spectral energy distribution in the near-infrared. The emission of 12CO is much more extended, with a 68% enclosing flux radius of 75AU. The large difference of the millimeter dust and gas extents (>5) strongly points to radial drift, and closely matches the predictions of theoretical models.

Abstract Copyright: © ESO 2019

Journal keyword(s): protoplanetary disks - submillimeter: planetary systems - stars: individual: CX Tauri

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 QSO B0235+1624 BLL 02 38 38.93010 +16 36 59.2746   16.46 15.50 15.92   ~ 1392 2
2 QSO B0400+258 QSO 04 03 05.58606763 +26 00 01.5028075     18 19.00   ~ 182 1
3 V* CX Tau Or* 04 14 47.8612023028 +26 48 11.013547235 16.48 15.93 14.50     M1.5Ve 149 0
4 QSO B0507+179 QSO 05 10 02.36912982 +18 00 41.5816534   20.0 19.0 19.09   ~ 313 1
5 NAME Lup Cloud SFR 16 03 -38.1           ~ 517 0
6 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3027 0

    Equat.    Gal    SGal    Ecl

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2020.07.08-03:13:28

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