Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-26T04:34:23.616Z Has data issue: false hasContentIssue false
  • English
  • Français

Small Scale Structure in Nearby Molecular Gas

Published online by Cambridge University Press:  12 April 2016

Edith Falgarone
Edith Falgarone*
Affiliation:
Laboratoire de Radioastronomie, Ecole Normale Supérieure, 24 rue Lhomond, F-75231 Paris Cedex 05, France

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Recent observations at high angular resolution of molecular clouds of low column density have revealed the presence of a conspicuous net of small scale filamentary structures, visible in the 12CO rotational lines only. In addition, the existence of unresolved structure at scales as small as ~ 200 AU in space and/or velocity space is inferred from the spectral properties of the 12CO and 13CO emission. The resolved structures are part of the hierarchy of structures observed in molecular gas in the Solar Neighborhood and appear as non self-gravitating elements confined by an ambient pressure P 0/kB ~ 3 × 104cm−3 K. We show why these structures might have their origin in the intermittent structures of turbulence in which viscous dissipation is concentrated in space and time.

Type
Part V Magnetic Fields, Molecular Clouds, and Interstellar Bubbles
Information
International Astronomical Union Colloquium , Volume 166: The Local Bubble and Beyond , 1997 , pp. 251 - 260
Copyright
Copyright © Springer-Verlag 1998

References

Anseimet, F., Gagne, Y., Hopfinger, E.J. & Antonia, R.A. (1984): JFM 140, 63.Google Scholar
Blitz, L. (1987): Physical Processes in Interstellar Clouds, eds. Morfill, & Scholer, , (Reidel, Dordrecht), 35 Google Scholar
Boulares, A. & Cox, D., (1990): ApJ, 365, 544.Google Scholar
Chièze, J.-P. (1987): A&A 171 225 Google Scholar
Dame, T.M., Elmegreen, B.G., Cohen, R.S. & Thaddeus, P., (1986): ApJ 305, 892.Google Scholar
Douady, S., Couder, Y. & Brachet, M.E., (1991): Phys. Rev. Letters, 67, 983.Google Scholar
Dubinski, J., Narayan, R. & Phillips, T.G., (1995): ApJ 448, 226.Google Scholar
Elmegreen, B.G. & Falgarone, E. (1996): ApJ 471, 816.Google Scholar
Falgarone, E. & Puget, J.-L. (1985): A&A 142, 157.Google Scholar
Falgarone, E. & Puget, J.-L. (1986): A&A 162, 235..Google Scholar
Falgarone, E., & Pérault, M., (1987): Physical Processes in Interstellar Clouds, eds. Morfill, & Scholer, , (Reidel, Dordrecht), 59 Google Scholar
Falgarone, E., Puget, J.-L., & Pérault, M. (1992): A&A, 257, 715 Google Scholar
Falgarone, E., Lis, D.C., Phillips, T.G., Pouquet, A., Porter, D.H. & Woodward, P.R., (1994): ApJ, 436, 728.Google Scholar
Falgarone, E. & Puget, J.-L. (1995): A&A, 293, 840 Google Scholar
Falgarone, E., Pineau des Forêts, G. & Roueff, E., (1995): A&A, 300, 870.Google Scholar
Falgarone, E. & Phillips, T.G. (1996): ApJ 472, 191.Google Scholar
Falgarone, E., Paniš, J.-F., Heithausen, A., Pérault, M., Stutzki, J., Puget, J.-L., & Bensch, F., (1997): A&A, in press.Google Scholar
Field, G.B. (1965): ApJ 142, 531.Google Scholar
Heithausen, A., Bensch, F., Stutzki, J., Falgarone, E., Panis, J.-F. (1997): A&A, submitted.Google Scholar
Herbertz, R., Ungerechte, H. & Winnewisser, G. (1991): A&A 249, 483.Google Scholar
Lada, E.A., Evans, N.J. II & Falgarone, E. (1997): ApJ in press.Google Scholar
Joulain, K., Falgarone, E., Pineau des Forêts, G. & Flower, D. (1997) A&A submittedGoogle Scholar
Larson, R. (1981): MNRAS 194 809.Google Scholar
Lemme, C., Walmsley, C.M., Wilson, T.L. & Muders, D. (1995): A&A, 302, 509.Google Scholar
Lis, D.C., Pety, J., Phillips, T.G. & Falgarone, E. (1996): ApJ 463, 623.Google Scholar
Loren, R.B. (1989): ApJ 338, 902.Google Scholar
Lucas, R. & Liszt, H. (1996): A&A, 307, 237 Google Scholar
Martin, H.M., Sanders, D.B. & Hills, R. (1984): MNRAS 208 35.Google Scholar
May, J., Alvarez, H. & Bronfman, L. (1997): A&A in press.Google Scholar
Penzias, A.A., Solomon, P.M., Jefferts, K.B. & Wilson, R.W. (1973): ApJL 174, L43 Google Scholar
Pérault, M., Falgarone, E., Puget, J.-L. (1985):A&A 152, 371.Google Scholar
Porter, D.H., Pouquet, A. & Woodward, P.R. (1994): Phys. Fluids, 6, 2133.Google Scholar
She, Z.S., Jackson, E., Orszag, S.A. (1990): Nature, 344, 226.CrossRefGoogle Scholar
Solomon, P.M., Rivolo, A.R., Barrett, J. & Yahil, A. (1987) ApJ, 319, 730.Google Scholar
Tabeling, P., Zocchi, G., Belin, F., Maurer, J. & Willaime, H. (1996): Phys. Rev. E, 53, 1613 Google Scholar
Tauber, J., Goldsmith, P.F. & Dickman, R.L.(1991): ApJ 375, 635.Google Scholar
Vincent, A. & Meneguzzi, M., (1991): J. Fluid Mech., 225, 1.Google Scholar
Wang, Y., Evans, N.J. II, Zhou, S. & Clemens, D.P. (1995): ApJ 454, 217.Google Scholar
Ward-Thompson, D., Scott, P.F., Hills, R.E. & André, P. (1994): MNRAS, 268, 276.Google Scholar
Williams, J.P., de Geus, E.J. & Blitz, L. (1994): ApJ 428, 693.Google Scholar