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Infall in Protostellar Envelopes

Published online by Cambridge University Press:  23 September 2016

Nagayoshi Ohashi
Nagayoshi Ohashi*
Affiliation:
Institute of Astronomy & Astrophysics, Academia Sinica, P.O. Box 23-141, Taipei 106, Taiwan, R.O.C.

Abstract

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We summarize recent progress of observational studies of infall in protostellar envelopes, with great emphasis on results obtained using millimeter and submillimeter interferometers. Interferometric observations allow us to spatially resolve kinematical structures of protostellar envelopes, enabling us to detect infalling motions in the envelope directly. High angular resolution observations of infalling envelopes having compact disks sufficiently bright in continuum show inverse P-Cygni profiles, which are the least ambiguous evidence for infall. Observations of infalling envelopes using the Submillimeter Array (SMA) may allow us to study the innermost infalling envelopes, where infalling motions most probably transform to Keplerian motions, leading to formation of Keplerian or protoplanetary disks around protostars.

Type
Part 2: From Molecular Clouds to Protostellar Cores
Information
Symposium - International Astronomical Union , Volume 221: Star Formation at High Angular Resolution , 2004 , pp. 75 - 82
Copyright
Copyright © Astronomical Society of the Pacific 2004 

References

Beichiman, C. A., Myers, P. C., Emerson, J. P., Harris, S., Mathieu, R., Benson, P. J., & Jennings, R. E. 1986, ApJ, 307, 337 Google Scholar
Chandler, J. C., & Sargent, A. I. 1993, ApJ, 414, L29 Google Scholar
Choi, M. 2002, ApJ, 575, 900 CrossRefGoogle Scholar
Choi, M., Panis, J-F., & Evans, N. J. II. 1999, ApJS, 122, 519 Google Scholar
Di Francesco, J., Myers, P. C., Wilner, D. J., Ohashi, N., & Mardones, D. 2001, ApJ, 562, 770 Google Scholar
Gregersen, E. M., Evans, N. J., Zhou, S., & Choi, M. 1997, ApJ, 484, 256 Google Scholar
Hirano, N., Ohashi, N., Dobashi, K., Shinnaga, H., & Hayashi, M. 2003, in ASP Conference Series, Vol. 289, ed. Ikeuchi, S., Hearnshaw, J., & Hanawa, T., (San Francisco: ASP), 141 Google Scholar
Mardones, D., Myers, P. C., Tafalla, M., Wilner, D. J., Bachiller, R., & Garay, G. 1997, ApJ, 489, 719 Google Scholar
Momose, M., Ohashi, N., Kawabe, R., Nakano, T., & Hayashi, M. 1998, ApJ, 504, 314 CrossRefGoogle Scholar
Larson, R. B. 1969, MNRAS, 145, 271 Google Scholar
Ohashi, N., Hayashi, M., Ho, P. T. P., Momose, M., & Hirano, N. 1996, ApJ, 466, 957 Google Scholar
Ohashi, N., Hayashi, M., Ho, P. T. P., & Momose, M. 1997a, ApJ, 475, 211 Google Scholar
Ohashi, N., Hayashi, M., Ho, P. T. P., Momose, M., Tamura, M., Hirano, N., & Sargent, A. I. 1997b, ApJ, 488, 317 Google Scholar
Ohashi, N., Lee, S.-W., Wilner, D. J., & Hayashi, M. 1999, ApJ, 518, L41 CrossRefGoogle Scholar
Park, Y.-S., Panis, J.-F., Ohashi, N., Choi, M., & Minh, Y. C. 2000, ApJ, 542, 344 Google Scholar
Penston, M. V. 1969, MNRAS, 144, 425 CrossRefGoogle Scholar
Shu, F. H. 1977, ApJ, 214, 488 Google Scholar
Wilner, D. J., Mardones, D., & Myers, P. C. 1997, in AIP Conf. Proc., 393, Star Formation Near and Far, ed. Holt, S. S. & Mundy, L. G. (New York: AIP), 109 Google Scholar
Wilner, D. J., Myers, P. C., Mardones, D., & Tafalla, M. 2000, ApJ, 544, L69 CrossRefGoogle Scholar
Yang, J., Ohashi, N., Yan, J., Liu, C., Kaifu, N., & Kimura, H. 1997, ApJ, 475, 683 Google Scholar
Zhang, Q., Ho, P. T. P., & Ohashi, N. 1998, ApJ, 494, 636 CrossRefGoogle Scholar
Zhou, S. 1992, ApJ, 394, 204 CrossRefGoogle Scholar
Zhou, S. 1995, ApJ, 442, 685 Google Scholar
Zhou, S., Evans, N. J., II., Kompe, C., & Walmsley, C. M. 1993, ApJ, 404, 232 Google Scholar
Zhou, S., Evans, N. J. II, & Wang, Y. 1996, ApJ, 466, 296 Google Scholar