Infrared polarimetry in the Rho Ophiuchus dark cloud

1979 ◽  
Vol 84 ◽  
pp. 199 ◽  
Author(s):  
B. A. Wilking ◽  
M. J. Lebofsky ◽  
J. C. Kemp ◽  
G. H. Rieke
Keyword(s):  
Dark Cloud ◽  
Rho Ophiuchus

An Infrared Imaging Survey of the ρ Oph and R CrA Dark Cloud Cores

1992 ◽  
Vol 10 (1) ◽  
pp. 52-54 ◽  
Author(s):  
Michael Burton
Keyword(s):  
Luminosity Function ◽  
Infrared Imaging ◽  
Mass Function ◽  
Initial Mass Function ◽  
Dark Cloud ◽  
Low Mass ◽  
Initial Survey ◽  
Cloud Cores ◽  
Rho Ophiuchus ◽  
Array Camera

AbstractWe report on an initial survey of the cores of the Rho Ophiuchus and R Coronae Australis clouds, made with the AAT’s new IR array camera, IRIS. No turnover is seen in the initial luminosity function for ρ Oph to the sensitivity limit of the survey. Some implications for the low mass end of the initial mass function are discussed.

Morphology and Energetics of the Molecular Gas within a Core and a Diffuse Region in the Filamentary Dark Cloud GF 9

2000 ◽  
Vol 120 (1) ◽  
pp. 393-406 ◽  
Author(s):  
David R. Ciardi ◽  
Charles E. Woodward ◽  
Dan P. Clemens ◽  
David E. Harker ◽  
Richard J. Rudy
Keyword(s):  
Molecular Gas ◽  
Dark Cloud ◽  
Diffuse Region

Polarimetric and photometric observations of CB54, with analysis of four other dark clouds

2021 ◽  
Vol 503 (4) ◽  
pp. 5274-5290
Author(s):  
A K Sen ◽  
V B Il’in ◽  
M S Prokopjeva ◽  
R Gupta
Keyword(s):  
Magnetic Field ◽  
Near Infrared ◽  
Galactic Plane ◽  
Photometric Data ◽  
Dust Particles ◽  
Dark Cloud ◽  
Dark Clouds ◽  
High Polarization ◽  
Field Parallel ◽  
Photometric Observations

ABSTRACT We present the results of our BVR-band photometric and R-band polarimetric observations of ∼40 stars in the periphery of the dark cloud CB54. From different photometric data, we estimate E(B − V) and E(J − H). After involving data from other sources, we discuss the extinction variations towards CB54. We reveal two main dust layers: a foreground, E(B − V) ≈ 0.1 mag, at ∼200 pc and an extended layer, $E(B-V) \gtrsim 0.3$ mag, at ∼1.5 kpc. CB54 belongs to the latter. Based on these results, we consider the reason for the random polarization map that we have observed for CB54. We find that the foreground is characterized by low polarization ($P \lesssim 0.5$ per cent) and a magnetic field parallel to the Galactic plane. The extended layer shows high polarization (P up to 5–7 per cent). We suggest that the field in this layer is nearly perpendicular to the Galactic plane and both layers are essentially inhomogeneous. This allows us to explain the randomness of polarization vectors around CB54 generally. The data – primarily observed by us in this work for CB54, by A. K. Sen and colleagues in previous works for three dark clouds CB3, CB25 and CB39, and by other authors for a region including the B1 cloud – are analysed to explore any correlation between polarization, the near-infrared, E(J − H), and optical, E(B − V), excesses, and the distance to the background stars. If polarization and extinction are caused by the same set of dust particles, we should expect good correlations. However, we find that, for all the clouds, the correlations are not strong.

scholarly journals Multicomponent Kinematics in a Massive Filamentary Infrared Dark Cloud

2019 ◽  
Vol 872 (1) ◽  
pp. 30 ◽  
Author(s):  
Vlas Sokolov ◽  
Ke Wang ◽  
Jaime E. Pineda ◽  
Paola Caselli ◽  
Jonathan D. Henshaw ◽  
...  
Keyword(s):  
Dark Cloud

scholarly journals The Interaction between the Supernova Remnant W41 and the Filamentary Infrared Dark Cloud G23.33-0.30

2019 ◽  
Vol 887 (1) ◽  
pp. 79
Author(s):  
Taylor G. Hogge ◽  
James M. Jackson ◽  
David Allingham ◽  
Andres E. Guzman ◽  
Nicholas Killerby-Smith ◽  
...  
Keyword(s):  
Supernova Remnant ◽  
Dark Cloud

SiO as a chemical signature of outflows from bright, compact sources in MSX IR-dark clouds

2004 ◽  
Vol 82 (6) ◽  
pp. 740-743 ◽  
Author(s):  
P A Feldman ◽  
R O Redman ◽  
L W Avery ◽  
J Di Francesco ◽  
J D Fiege ◽  
...  
Keyword(s):  
Star Formation ◽  
Young Stellar Objects ◽  
Line Profiles ◽  
Bipolar Outflows ◽  
Dark Cloud ◽  
Stellar Objects ◽  
Dark Clouds ◽  
Dense Cores ◽  
Infrared Dark Clouds ◽  
Compact Sources

The line profiles of dense cores in infrared-dark clouds indicate the presence of young stellar objects (YSOs), but the youth of the YSOs and the large distances to the clouds make it difficult to distinguish the outflows that normally accompany star formation from turbulence within the cloud. We report here the first unambiguous identification of a bipolar outflow from a young stellar object (YSO) in an infrared-dark cloud, using observations of SiO to distinguish the relatively small amounts of gas in the outflow from the rest of the ambient cloud. Key words: infrared-dark clouds, star formation, bipolar outflows, SiO, G81.56+0.10.

scholarly journals Deuterium fractionation of a distant cold dark cloud along the line of sight of W51

2016 ◽  
Vol 597 ◽  
pp. A45 ◽  
Author(s):  
C. Vastel ◽  
B. Mookerjea ◽  
J. Pety ◽  
M. Gerin
Keyword(s):  
Line Of Sight ◽  
Dark Cloud
Sign in / Sign up

Export Citation Format

Share Document