Abstract
Eighteen regions (bipolar outflows and methanol masers) are mapped in the CS(2-1) line using the 20-m Onsala radio telescope. The coordinates of the CS emission peaks are refined. The sizes and masses of dense regions are estimated for 13 maps. Measurement of the angular sizes of regions of emission indicates that all the sources were resolved by the Onsala radio telescope. The lower limit for the linear dimensions of the CS condensations studied is 0.2–2.1 pc. The hydrogen densities and masses of the CS condensations are estimated to be n(H2)=(0.3–13.1)×104 cm−3 and (M ≈ 7–2800M ⊙). Methanol masers are associated with denser and more massive regions, whether or not the maser condensation is connected with a bipolar outflow.
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R. L. Plambeck and K. M. Menten, Astrophys. J. 364, 555 (1990).
A. D. Haschick, K. M. Menten, and W. A. Baan, Astrophys. J. 354, 556 (1990).
S. V. Kalenskii, R. Bachiller, I. I. Berulis, et al., Astron. Zh. 69, 1002 (1992) [Sov. Astron. 36, 517 (1992)].
R. Bachiller, S. Liechti, C. M. Walmsley, and F. Colomer, Astron. Astrophys. 295, L51 (1995).
G. M. Larionov, I. E. Val'tts, A. Winnberg, et al., Astron. Astrophys., Suppl. Ser. 139, 257 (1999).
F. J. Lovas, J. Phys. Chem. Ref. Data 21, 181 (1992).
S. V. Shitov, V. P. Koshelets, S. A. Kovtonyuk, et al., Supercond. Sci. Technol. 4, 406 (1991).
M. L. Kutner and B. L. Ulich, Astrophys. J. 250, 341 (1981).
B. R. Levin, Theoretical Foundations of Statistical Radio Engineering [in Russian] (Radio i Svyaz', Moscow, 1989).
E. T. Jaynes, Proc. IEEE 70, 952 (1982).
J. Burg, PhD Thesis (Stanford Univ., 1975).
R. Wilczek and S. Drapatz, Astron. Astrophys. 142, 9 (1985).
S. L. Marple, Jr., Digital Spectral Analysis with Applications (Prentice-Hall, Englewood Cliffs, 1987; Mir, Moscow, 1990).
R. Narayan and R. Nityanada, Ann. Rev. Astron. Astrophys. 24, 597 (1986).
G. H. Moriarty-Schieven, R. L. Snell, S. E. Strom, et al., Astrophys. J. 319, 742 (1987).
V. G. Promislov, in Advances in Soft Computing, Ed. by R. Roy, T. Furuhashi, and P. K. Chawdhry (Physica-Verlag, New York, 1998), p. 421.
W. M. Irvine, P. F. Goldsmith, and A. Hjalmarson, in Interstellar Processes, Ed. by D. J. Hollenbach and H. A. Thronson (Kluwer, Dordrecht, 1987), p. 561.
Y. Fukui, in Low Mass Star Formation and Pre-Main Sequence Objects, Ed. by Reipurth (ESO, Garching bei Munchen, 1989), p. 95.
D. S. Shepherd and E. Churchwell, Astrophys. J. 472, 225 (1996).
R. L. Snell, R. L. Dickman, and Y. L. Huang, Astrophys. J. 352, 139 (1990).
V. I. Slysh, S. V. Kalenskii, I. E. Val'tts, et al., Astron. Astrophys., Suppl. Ser. 134, 115 (1999).
J. M. Carpenter, R. L. Snell, F. P. Schloerb, and M. F. Skrutskie, Astrophys. J. 407, 657 (1993).
R. Bachiller, J. Cernicharo, J. Martin-Pintado, et al., Astron. Astrophys. 231, 174 (1990).
K. M. Menten, Astrophys. J. 380, L75 (1991).
R. Plume, D. T. Jaffe, N. J. Evans, et al., Astrophys. J. 476, 730 (1997).
R. L. Snell, Y. L. Huang, R. L. Dickman, and M. J. Claussen, Astrophys. J. 325, 853 (1988).
J. L. Caswell, R. A. Vaile, S. P. Ellingsen, et al., Mon. Not. R. Astron. Soc. 272, 96 (1995).
I. Zinchenko, V. Forsstrom, A. Lapinov, and K. Mattila, Astron. Astrophys. 288, 601 (1994).
J. M. Carpenter, R. L. Snell, F. P. Schloerb, and M. F. Skrutskie, Astrophys. J. 450, 201 (1995).
T. R. Hunter, T. G. Phillips, and K. M. Menten, Astrophys. J. 478, 283 (1997).
J. Fisher, D. B. Sanders, M. Simon, and P. M. Solomon, Astrophys. J. 293, 508 (1985).
M. Cohen, Astrophys. J. 215, 533 (1977).
R. M. Levreault, Astrophys. J., Suppl. Ser. 67, 283 (1988).
K. Sugitani and Y. Fukui, in Star Forming Regions (IAU Symp. 115), Ed. by M. Peimbert and Jun Jugaku (Reidel, Dordrecht, 1987), p. 75.
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Translated from Astronomicheski\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Zhurnal, Vol. 78, No. 5, 2001, pp. 387–395.
Original Russian Text Copyright © 2001 by Larionov, Promyslov, Val'tts.
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Larionov, G.M., Promyslov, V.G. & Val'tts, I.E. Mapping of bipolar outflows and methanol masers in the CS(2-1)line. Astron. Rep. 45, 331–338 (2001). https://doi.org/10.1134/1.1369796
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DOI: https://doi.org/10.1134/1.1369796