Results 101 to 110 of about 476,181 (204)

Feeding vs Falling. The growth and collapse of molecular clouds in a turbulent interstellar medium

, 2017
In order to understand the origin of observed molecular cloud properties, it is critical to understand how clouds interact with their environments during their formation, growth and collapse.
Ibáñez-Mejía, Juan C., Ralf S. Klessen, Baczynski, C., Juan C. Ibáñez-Mejía, Klessen, R., Mac Low, M., Ibáñez-Mejía, J., Mac Low, Mordecai-Mark, Mordecai-Mark Mac Low, Klessen, Ralf S., Baczynski, Christian, Christian Baczynski   +11 more
core   +1 more source

The Relation between Variances of 3D Density and Its 2D Column Density Revisited

The Astrophysical Journal
We revisit the relation between the variance of three-dimensional (3D) density ( ${\sigma }_{\rho }^{2}$ ) and that of the projected two-dimensional (2D) column density ( ${\sigma }_{{\rm{\Sigma }}}^{2}$ ) in turbulent media, which is of great importance
Heesun Yoon, Jungyeon Cho
doaj   +1 more source

Disclosing Identities in Diffuse Interstellar Bands

, 2011
The linear isomer of C 3 H 2 has been proposed as the source of broad absorption bands in diffuse interstellar clouds, but it is still being debated.
Benjamin J. McCall, Takeshi Oka
core   +1 more source

CO-dark Molecular Gas Traced by HCO+ in the Diffuse Interstellar Medium

The Astrophysical Journal
A classic problem in the study of the interstellar medium (ISM) is the near-invisibility of molecular hydrogen (H _2 ) in cold environments. Observations of CO emission are typically used to indirectly trace H _2 , but a significant fraction of H _2 in ...
Daniel R. Rybarczyk, Michael P. Busch, J. R. Dawson, Min-Young Lee, Gan Luo   +4 more
doaj   +1 more source

Morphological Evidence for the eROSITA Bubbles Being Giant and Distant Structures

The Astrophysical Journal Letters
There are two contradictory views of the eROSITA bubbles: either a 10 ^4 pc scale pair of giant bubbles blown by the Galactic center (GC), or a 10 ^2 pc scale local structure coincidentally located in the direction of GC.
Teng Liu, Andrea Merloni, Jeremy Sanders, Gabriele Ponti, Andrew Strong, Michael C. H. Yeung, Nicola Locatelli, Peter Predehl, Xueying Zheng, Manami Sasaki, Michael Freyberg, Konrad Dennerl, Werner Becker, Kirpal Nandra, Martin Mayer, Johannes Buchner   +15 more
doaj   +1 more source

The abundance of interstellar C60 molecules toward BD+31°643 and other stars

Astronomy & Astrophysics
Context. The diffuse interstellar bands (DIBs) at 9577 and 9632 Å are attributed to electronic transitions of the C60+ fullerene ion; thus, its column density in molecular clouds may be inferred.
Rouillé Gaël, Gredel Roland
doaj   +1 more source

Interstellar lithium - Differential depletion in diffuse clouds

The Astrophysical Journal, 1986
Les observations de LiId6708 ont conduit a la detection en direction de sept etoiles et a des limites en direction de quinze ...
openaire   +1 more source

Compact dusty clouds and efficient H₂ formation in diffuse interstellar medium

, 2018
The formation of compact dusty clouds in diffuse interstellar medium (ISM) has been recently proposed and studied by Tsytovich et al. In the present paper, the effect of the clouds on the rate of H → H2 transition in the ISM is examined.
Caselli, P., Vasyunin, A., Ivlev, A. V., Ivlev, A., Burkert, A.   +4 more
core   +1 more source

The Densities in Diffuse and Translucent Molecular Clouds: Estimates from Observations of C2 and from Three-dimensional Extinction Maps

The Astrophysical Journal
Newly computed collisional rate coefficients for the excitation of C _2 in collisions with H _2 , presented recently by Najar & Kalugina, are significantly larger than the values adopted previously in models for the excitation of the C _2 molecule, a ...
David A. Neufeld, Daniel E. Welty, Alexei V. Ivlev, Paola Caselli, Gordian Edenhofer, Nick Indriolo, Marta Obolentseva, Kedron Silsbee, Paule Sonnentrucker, Mark G. Wolfire   +9 more
doaj   +1 more source

Formaldehyde production in diffuse interstellar clouds [PDF]

Monthly Notices of the Royal Astronomical Society, 1979
Millar, TJ, Duley, W.W., Williams, D.A.
openaire   +1 more source