English
Related papers

Related papers: Distance estimation of some selected small Bok glo…

200 papers

We have measured the distance to the Local Group dwarf irregular galaxy IC 10 from near-infrared $JHK$ observations of Cepheids. The reddening-corrected distance modulus is $24.57\pm0.21$ mag or $0.82\pm 0.08$ Mpc. This distance lies at the…

Astrophysics · Physics 2009-10-28 C. D. Wilson , D. L. Welch , I. N. Reid , A. Saha , J. Hoessel

We present Herschel observations of the isolated, low-mass star-forming Bok globule CB244. It contains two cold sources, a low-mass Class 0 protostar and a starless core, which is likely to be prestellar in nature, separated by 90 arcsec (~…

Solar and Stellar Astrophysics · Physics 2015-05-18 A. Stutz , R. Launhardt , H. Linz , O. Krause , T. Henning , J. Kainulainen , M. Nielbock , J. Steinacker , P. Andre

I present a catalog of distances to 63 molecular clouds located within ~2.5 kpc of the Sun. The cloud distances are derived based on utilizing the Gaia DR3 parallaxes of the young stellar objects (YSOs). By identifying AllWISE YSO…

Astrophysics of Galaxies · Physics 2023-04-19 Miaomiao Zhang

We present high-resolution spectra (R ~ 49,000) of stars that have parallax measurements from the Hipparcos satellite and are projected along the line of sight to the two nearest known star forming clouds to the Sun: MBM12 and MBM20. The…

Astrophysics · Physics 2007-05-23 T. Hearty , M. Fernandez , J. M. Alcala , E. Covino , R. Neuhauser

We present the results of a comprehensive infrared, submillimetre, and millimetre continuum emission study of isolated low-mass star-forming cores in 32 Bok globules, with the aim to investigate the process of star formation in these…

Astrophysics of Galaxies · Physics 2015-05-18 R. Launhardt , D. Nutter , D. Ward-Thompson , T. L. Bourke , Th. Henning , T. Khanzadyan , M. Schmalzl , S. Wolf , R. Zylka

We present high angular resolution SMA and Spitzer observations toward the Bok globule CB17. SMA 1.3mm dust continuum images reveal within CB17 two sources with an angular separation of about 21" (about 5250 AU at a distance of 250 pc). The…

Solar and Stellar Astrophysics · Physics 2015-06-04 Xuepeng Chen , Hector G. Arce , Michael M. Dunham , Qizhou Zhang , Tyler L. Bourke , Ralf Launhardt , Markus Schmalzl , Thomas Henning

The distance to LMC and SMC is a subject of controversy, with the difference between the extreme values in distance moduli exceeding 0.5 mag. While currently the best calibrated method is based on red clump giants, and the near future…

Astrophysics · Physics 2007-05-23 Bohdan Paczynski

Context: The role of magnetic fields in the star formation process is a contentious matter of debate. In particular, no clear observational proof exists of a general influence by magnetic fields during the initial collapse of molecular…

Solar and Stellar Astrophysics · Physics 2014-04-23 Gesa Bertrang , Sebastian Wolf , Himadri S. Das

We present the polarization maps of three selected Bok globules CB56, CB60 and CB69 constructed using a V-band data from a CCD imaging polarimeter. The aim of this work is to measure the optical polarization ($p_v$) of background field…

Solar and Stellar Astrophysics · Physics 2014-05-28 A. Chakraborty , H. S. Das , D. Paul

The determination of absolute and relative distances of molecular clouds along the line-of-sight towards the central molecular zone (CMZ) is crucial to infer its orbital structure, dynamics, and to understand star formation in the clouds.…

Astrophysics of Galaxies · Physics 2021-03-17 Francisco Nogueras-Lara , Rainer Schödel , Nadine Neumayer , Mathias Schultheis

We study the influence and structure of the magnetic field in the early phases of low-mass star formation using polarization maps of Bok globules at a wavelength of 850micron, obtained with the Submillimeter Common-User Bolometer Array…

Astrophysics · Physics 2009-11-10 Sebastian Wolf , Ralf Launhardt , Thomas Henning

We report on a first application of the infrared surface brightness technique on a Cepheid in the Large Magellanic Cloud, the variable HV 12198 in the young globular cluster NGC 1866. From this one star, we determine a distance modulus of…

Astrophysics · Physics 2009-10-31 W. P. Gieren , J. Storm , P. Fouque , R. E. Mennickent , M. Gomez

The polarization observed for stars background to dark clouds (Bok Globules) is often used as diagnostic to study the ongoing star formation processes in these clouds. Such polarization in the optical have been reported for eight nearby…

Astrophysics · Physics 2009-09-15 A. K. Sen , T. Mukai , R. Gupta , H. S. Das

We present Very Large Array observations at 1.3 cm of several water maser detections obtained by previous single-dish studies of Bok globules in the Clemens & Barvainis (1988; CB) catalog. We report water maser emission in CB 3 (CB3-mm), CB…

We trace the peripheral magnetic field structure of Bok globule CB130, by estimating the linear polarization of its field stars in the R band. The magnetic field orientation sampled by these stars, aligned on average among themselves and…

Solar and Stellar Astrophysics · Physics 2016-09-07 A. Chakraborty , H. S. Das

Distance measurements to molecular clouds are important, but are often made separately for each cloud of interest, employing very different different data and techniques. We present a large, homogeneous catalog of distances to molecular…

We report the first determination of a distance bracket for the high-velocity cloud (HVC) complex C. Combined with previous measurements showing that this cloud has a metallicity of 0.15 times solar, these results provide ample evidence…

We present a large catalogue of molecular clouds with accurate distance estimates in the southern sky. Based on the three-dimensional (3D) dust extinction map and the best-fit extinction and distance information of over 17 million stars…

Astrophysics of Galaxies · Physics 2022-02-23 Helong Guo , Bingqiu Chen , Xiaowei Liu

In the J, H, and Ks bands survey of the the Galactic Center region over an area of 2deg x 5deg, we have found many dark clouds, among which a distinguished chain of dark clouds can be identified with a quiescent CO cloud. The distances of…

We report the most sensitive water maser survey towards Bok globules to date, using NASA's 70m antenna in Robledo de Chavela (Spain). We observed 207 positions within the CB catalog with a higher probability of harboring a young star, using…