Results 11 to 20 of about 13,210 (208)

Physical properties of interstellar filaments [PDF]

Astronomy and Astrophysics, 2012
We analyze the physical parameters of interstellar filaments that we describe by an idealized model of isothermal self-gravitating infinite cylinder in pressure equilibrium with the ambient medium.
André, Arzoumanian, Benson, Bohlin, Bonnor, Bontemps, Boulares, Curry, Curry, Di Francesco, Dobashi, Ebert, Enoch, Fiege, Fischera, Fischera, Fitzpatrick, Foster, Gaida, Glover, Goldsmith, Hanawa, Harvey, Heyer, Hill, Inutsuka, Inutsuka, J. Fischera, Johnstone, Kalberla, Kandori, Kramer, Könyves, Martin, Martin, McCrea, McKee, Men’shchikov, Miville-Deschênes, Myers, Nagasawa, Onishi, Ostriker, P. G. Martin, Pineda, Roy, Schneider, Schneider, Stodólkiewicz   +48 more
core   +5 more sources

Formation and evolution of interstellar filaments [PDF]

Astronomy and Astrophysics, 2013
We investigate the gas velocity dispersions of a sample of filaments recently detected as part of the Herschel Gould Belt Survey in the IC 5146, Aquila, and Polaris interstellar clouds. To measure these velocity dispersions, we use 13CO, C18O, and N2H+ line observations obtained with the IRAM 30 m telescope.
Nicolas Peretto, Vera Könyves
exaly   +6 more sources

Profiles of interstellar cloud filaments. Observational effects in synthetic sub-millimetre observations [PDF]

Astronomy & Astrophysics, 2012
Sub-millimetre observations suggest that the filaments of interstellar clouds have rather uniform widths and can be described with the so-called Plummer profiles. The shapes of the filament profiles are linked to their physical state.
André, Arzoumanian, Bally, Draine, Elmegreen, Heitsch, Inutsuka, J. Malinen, Juvela, Juvela, Juvela, Juvela, Köhler, Lunttila, M. Juvela, Malinen, Malinen, Mathis, Meny, Men’shchikov, Myers, Nutter, Ormel, Ossenkopf, Ostriker, Padoan, Peretto, Schneider, Stepnik, Stodólkiewicz, T. Lunttila, Ysard   +31 more
core   +2 more sources

Associations between Scattering Screens and Interstellar Medium Filaments

The Astrophysical Journal
Pulsar scintillation can be used to measure small-scale structure in the Galaxy, but little is known about the specific interstellar medium (ISM) features that cause scintillation.
Ashley M. Stock, Marten H. van Kerkwijk
doaj   +3 more sources

Galactic interstellar filaments as probed by LOFAR and Planck [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2015
Recent Low Frequency Array (LOFAR) observations at 115-175 MHz of a field at medium Galactic latitudes (centered at the bright quasar 3C196) have shown striking filamentary structures in polarization that extend over more than 4 degrees across the sky ...
A. Bracco, A. G. de Bruyn, Bernardi, Brentjens, Cabral, Clark, Davis, Draine, F. Boulanger, F. Levrier, Ferrière, Haverkorn, Hiltner, Iacobelli, J. D. Soler, Jelić, Jelić, K. Ferrière, L. Montier, L. V. E. Koopmans, Lazarian, M. A. Brentjens, M. I. R. Alves, M.-A. Miville-Deschênes, Pavel, Planck Collaboration I, Planck Collaboration XIX, Planck Collaboration XX, Planck Collaboration XXXII, R. Kooistra, Reynolds, S. Zaroubi, Serkowski, T. Ghosh, Tassis, V. Jelić, V. N. Pandey, van Haarlem   +37 more
core   +14 more sources

Deep Learning for Position Angle Quantification Applied to Interstellar Filaments

The Astronomical Journal
Studying filamentary structures opened a door for understanding the conditions of star formation and interstellar medium properties. Present-day algorithms for identifying filaments and their orientations require careful individual parameterization for ...
Temirkul Umetaliev, Dana Alina, Anel Salmenova   +2 more
doaj   +2 more sources

Neutral hydrogen filaments in interstellar media: Are they physical?

Reviews of Modern Plasma Physics
The trending term "filament" is extensively used in the interstellar medium (ISM) and the star formation community, and is believed to be one of the most important objects that gauge molecular cloud and star formation. However, the physical definition of these ubiquitous, elongated, high contrast features is poorly defined and still actively debated ...
Ka Ho Yuen, Ka Wai Ho
exaly   +3 more sources

Characterizing interstellar filaments withHerschelin IC 5146 [PDF]

Astronomy & Astrophysics, 2011
We provide a first look at the results of the Herschel Gould Belt survey toward the IC5146 molecular cloud and present a preliminary analysis of the filamentary structure in this region. The column density map, derived from our 70-500 micron Herschel data, reveals a complex network of filaments, and confirms that these filaments are the main birth ...
Arzoumanian, D., André, Ph., Didelon, P., Konyves, V., Schneider, N., Men'Shchikov, A., Sousbie, T., Zavagno, Annie, Bontemps, Sylvain, Di Francesco, J., Griffin, M., Hennemann, M., Hill1, T., Kirk, J., Martin, P., Minier, V., Molinari, S., Motte, F., Peretto, N., Pezzuto, S., Spinoglio, L., Ward-Thompson, D., White, G., Wilson, C. D.   +23 more
openaire   +4 more sources

EVIDENCE FOR AN INTERSTELLAR DUST FILAMENT IN THE OUTER HELIOSHEATH [PDF]

The Astrophysical Journal, 2015
Submitted to Astrophysical Journal January 19 ...
P. C. Frisch, B-G Andersson, A. Berdyugin, V. Piirola, H. O. Funsten, A. M. Magalhaes, D. B. Seriacopi, D. J. McComas, N. A. Schwadron, J. D. Slavin, S. J. Wiktorowicz   +10 more
openaire   +2 more sources

Interstellar Filaments and the Statistics of Galactic Hi [PDF]

The Astrophysical Journal, 1997
This paper presents a statistical explanation of filament formation in the galactic atomic hydrogen. Recently developed technique allows to determine the 3D spectrum of random HI density. We claim that even in the absence of dynamical factors the Gaussian field corresponding to the measured values of the spectrum of HI density should exhibit ...
Lazarian, Alex, Pogosyan, Dmitri
openaire   +2 more sources