Results 51 to 60 of about 4,796,716 (321)
SUPERNOVA DRIVING. I. THE ORIGIN OF MOLECULAR CLOUD TURBULENCE [PDF]
, 2015 Turbulence is ubiquitous in molecular clouds (MCs), but its origin is still unclear because MCs are usually assumed to live longer than the turbulence dissipation time.
P. Padoan +3 more
semanticscholar +1 more source
An Investigation of the Entropy Associated with a Collapsing Molecular Cloud
AstronomyThe investigation of entropy variation during the star formation process within collapsing molecular clouds represents a significant field of inquiry in astrophysics.
Gemechu Muleta Kumssa
doaj +1 more source
Discovery of the Pigtail Molecular Cloud in the Galactic Center
, 2012 This paper reports the discovery of a helical molecular cloud in the central molecular zone (CMZ) of our Galaxy. This "pigtail" molecular cloud appears at (l, b, V_LSR) ~ (-0.7deg, +0.0deg, -70 to -30 km/s), with a spatial size of ~ (20 pc)^2 and a mass ...
Binney +27 more
core +1 more source
Statistical study of dust properties in LMC molecular clouds [PDF]
, 2010 The objective of this paper is to construct a catalog providing the dust properties and the star formation efficiency (SFE) of the molecular clouds in the Large Magellanic Cloud (LMC).
Akiko Kawamura +36 more
core +2 more sources
Possibilities for Methanogenic and Acetogenic Life in Molecular Clouds
LifeAccording to panspermia, life on Earth may have originated from life forms transported through space from elsewhere. These life forms could have passed through molecular clouds, where the process of methanogenesis could have provided enough energy to ...
Lei Feng
doaj +1 more source
CARMA LARGE AREA STAR FORMATION SURVEY: OBSERVATIONAL ANALYSIS OF FILAMENTS IN THE SERPENS SOUTH MOLECULAR CLOUD [PDF]
, 2014 We present the N2H+ (J = 1 → 0) map of the Serpens South molecular cloud obtained as part of the CARMA Large Area Star Formation Survey. The observations cover 250 arcmin2 and fully sample structures from 3000 AU to 3 pc with a velocity resolution of 0 ...
M. Fernández-López +22 more
semanticscholar +1 more source
Anchoring Magnetic Field in Turbulent Molecular Clouds [PDF]
, 2009 One of the key problems in star formation research is to determine the role of magnetic fields. Starting from the atomic inter-cloud medium (ICM) which has density nH ~ 1 per cubic cm, gas must accumulate from a volume several hundred pc across in order ...
Alyssa Goodman +26 more
core +2 more sources
Chemistry of Molecular Clouds [PDF]
International Astronomical Union Colloquium, 1989 AbstractA discussion is presented of the chemistry of quiescent molecular clouds, and the effects of the presence of polycyclic aromatic hydrocarbon molecules and of cosmic-ray induced ultraviolet photons are examined. A comparison is made with the chemistry occurring in molecular clouds that are subjected to shocks and the differences between ...
openaire +1 more source
Evolving molecular cloud structure and the column density probability distribution function [PDF]
, 2014 The structure of molecular clouds can be characterized with the probability distribution function (PDF) of the mass surface density. In particular, the properties of the distribution can reveal the nature of the turbulence and star formation present ...
R. L. Ward, J. Wadsley, A. Sills
semanticscholar +1 more source
Comparative Analysis of Molecular Clouds in M31, M33 and the Milky Way [PDF]
, 2007 We present BIMA observations of a 2$\arcmin$ field in the northeastern spiral arm of M31. In this region we find six giant molecular clouds that have a mean diameter of 57$\pm$13 pc, a mean velocity width of 6.5$\pm$1.2 \kms, and a mean molecular mass of
Christine D. Wilson +7 more
core +2 more sources