SIMBAD references

2021ApJS..256...30K - Astrophys. J., Suppl. Ser., 256, 30-30 (2021/October-0)

Massive compact disks around FU Orionis-type young eruptive stars revealed by ALMA.

KOSPAL A., CRUZ-SAENZ DE MIERA F., WHITE J.A., ABRAHAM P., CHEN L., CSENGERI T., DONG R., DUNHAM M.M., FEHER O., GREEN J.D., HASHIMOTO J., HENNING T., HOGERHEIJDE M., KUDO T., LIU H.B., TAKAMI M. and VOROBYOV E.I.

Abstract (from CDS):

The FU Orionis-type objects (FUors) are low-mass pre-main-sequence stars undergoing a temporary but significant increase of mass accretion rate from the circumstellar disk onto the protostar. It is not yet clear what triggers the accretion bursts and whether the disks of FUors are in any way different from the disks of nonbursting young stellar objects. Motivated by this, we conducted a 1.3 mm continuum survey of 10 FUors and FUor-like objects with ALMA, using both the 7 m array and the 12 m array in two different configurations to recover emission at the widest possible range of spatial scales. We detected all targeted sources and several nearby objects as well. To constrain the disk structure, we fit the data with models of increasing complexity from 2D Gaussian to radiative transfer, enabling comparison with other samples modeled in a similar way. The radiative transfer modeling gives disk masses that are significantly larger than what is obtained from the measured millimeter fluxes assuming optically thin emission, suggesting that the FUor disks are optically thick at this wavelength. In comparison with samples of regular class II and class I objects, the disks of FUors are typically a factor of 2.9-4.4 more massive and a factor of 1.5-4.7 smaller in size. A significant fraction of them (65%-70%) may be gravitationally unstable.

Abstract Copyright: © 2021. The American Astronomical Society. All rights reserved.

Journal keyword(s): Young stellar objects - FU Orionis stars - Circumstellar disks - Submillimeter astronomy - Interferometry

VizieR on-line data: <Available at CDS (J/ApJS/256/30): table1.dat img/*>

CDS comments: AR 6A, 6B, 6C, 6D, Haro 5a IRS B, L1551 IRS 5 N, L1551 IRS 5 S, V346 Nor B, V960 Mon E, V960 Mon N, V960 Mon S and V960 Mon SE are not in SIMBAD.

Simbad objects: 29

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2023.01.28-17:10:31

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