Abstract
We investigate the question of disk formation during the protostar phase. We build on the results of Keene and Masson (1990) whose analysis of L1551 showed the millimeter continuum emission comes from both an unresolved circumstellar component, i.e., a disk and an extended cloud core. We model the dust continuum emission from the cloud core and show how it is important at 1.3 mm but negligible at 2.7 mm. Combining new 2.7 mm Owens Valley Interferometer data of IRAS-Dense cores with data from the literature we conclude that massive disks are also seen toward a number of other sources. However, 1.3 mm data from the IRAM 30 m telescope for a larger sample shows that massive disks are relatively rare, occurring around perhaps 5% of young embedded stars. This implies that either massive disks occur briefly during the embedded phase or that relatively few young stars form massive disks. At 1.3 mm the median flux of IRAS-Dense cores is nearly the same as T Tauri stars in the sample of Beckwithet al. (1990). We conclude that the typical disk mass during the embedded phase is nearly the same or less than the typical disk mass during the T Tauri phase.
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Adams, F.C., Emerson, J.P. and Fuller, G.A.: 1990,Astrophysical Journal,357, 606–620.
André, P. and Montmerle, T.: 1993, From T Tauri Stars to Protostars: Circumstellar Material and Young Stellar Objects in theρ Ophiuchi Cloud, submitted to theAstrophysical Journal.
André, P., Montmerle, T., Feigelson, D. and Steppe, H.: 1990,Astronomy and Astrophysics,240, 321–330.
Beckwith, S.V.W., Sargent, A.I., Chini, R.S. and Gusten, R.: 1990,Astronomical Journal,99, 924–945.
Beichman, C.A., Myers, P.C., Emerson, J.P., Harris, S., Mathieu, R., Benson, P.J. and Jennings, R.E.: 1986,Astrophysical Journal,307, 337–349.
Benson, P.J. and Myers, P.C.: 1989,Astrophysical Journal Supplement,71, 89–108.
Keene, J. and Masson, C.R.: 1990,Astrophysical Journal,355, 635–644.
Myers, P.C. and Benson, P.J.: 1983,Astrophysical Journal,266, 309–320.
Myers, P.C., Fuller, G.A., Mathieu, R.D., Beichman, C.A., Benson, P.J., Schild, R.E. and Emerson, J.P.: 1987,Astrophysical Journal,319, 340–357.
Shu, F.H., Adams, F.C. and Lizano, S.: 1987,Annual Reviews of Astronomy and Astrophysics,25, 23–81.
Terebey, S., Chandler, C.J. and André, P.: 1993,Astrophys. J. 414, 759–772.
Terebey, S., Shu, F.H. and Cassen, P.C.: 1984,Astrophysical Journal,286, 529–551 (TSC).
Weintraub, D.A., Sandell, G. and Duncan, W.D.: 1989,Astrophysical Journal,340, L69-L72.
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Terebey, S., Chandler, C.J. & André, P. Millimeter continuum measurements of circumstellar dust around very young low-mass stars. Astrophys Space Sci 212, 191–195 (1994). https://doi.org/10.1007/BF00984523
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DOI: https://doi.org/10.1007/BF00984523