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Related papers: Distances to molecular clouds in the second Galact…

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We are studying the column density distribution of all nearby giant molecular clouds. As part of this project we generated several all sky extinction maps. They are calculated using the median near infrared colour excess technique applied…

Astrophysics of Galaxies · Physics 2009-11-13 J. Rowles , D. Froebrich

We have carried out a morphological search for molecular clouds possibly associated with 48 Galactic infrared bubbles with angular radii of $>1'$ in the southern Galactic plane of $295^\circ \le l\le 350^\circ$ and $|b|\le 1^\circ$…

Astrophysics of Galaxies · Physics 2025-07-03 Mikito Kohno , Yoshiaki Sofue , Yasuo Fukui , Kengo Tachihara

Aims: We aim to develop a method to determine distances to molecular clouds using JHK near-infrared photometry. Methods: The method is based on a technique that aids spectral classification of stars lying towards the fields containing the…

Astrophysics of Galaxies · Physics 2010-11-11 G. Maheswar , C. -W. Lee , H. C. Bhatt , S. V. Mallik , Sami Dib

New-generation spectroscopic surveys of the Milky Way plane have been revealing the structure of the interstellar medium, allowing the simultaneous study of dense structures from single star-forming objects or systems to entire spiral arms.…

We derive the distance and structure of the Perseus molecular cloud by combining trigonometric parallaxes from Very Long Baseline Array (VLBA) observations, taken as part of the GOBELINS survey, and Gaia Data Release 2. Based on our VLBA…

Kinematic distances to 750 molecular clouds identified in the 13CO J=1-0 Boston University-Five College Radio Astronomy Observatory Galactic Ring Survey (BU-FCRAO GRS) are derived assuming the Clemens rotation curve of the Galaxy. The…

Astrophysics of Galaxies · Physics 2009-07-22 Julia Roman-Duval , James M. Jackson , Mark Heyer , Alexis Johnson , Jill Rathborne , Ronak Shah , Robert Simon

We present a study of the three-dimensional structure of the molecular clouds in the Galactic Centre (GC) using CO emission and OH absorption lines. Two CO isotopologue lines, $^{12}$CO ($J$=1$\rightarrow$0) and $^{13}$CO…

We present an analysis of wide-field infrared extinction maps of a region in Perseus just north of the Taurus-Auriga dark cloud complex. From this analysis we have identified a massive, nearby, but previously unrecognized, giant molecular…

Astrophysics of Galaxies · Physics 2015-05-13 Charles J. Lada , Marco Lombardi , Joao F. Alves

We present a new distance estimation method for dust-continuum-identified molecular cloud clumps. Recent (sub-)millimeter Galactic plane surveys have cataloged tens of thousands of these objects, but detailed study of their physical…

The average of 14 recent measurements of the distance to the Large Magellanic Cloud (LMC) implies a true modulus of 18.50 +- 0.02 mag, and demonstrates a trend in the past 2 years of convergence toward a standard value. The distance…

Astrophysics · Physics 2009-11-10 David R. Alves

The unprecedented astrometry from Gaia DR2 provides us with an opportunity to study in detail molecular clouds in the solar neighbourhood. Extracting the wealth of information in these data remains a challenge, however. We have further…

Astrophysics of Galaxies · Physics 2020-11-18 Sara Rezaei Kh. , Coryn A. L. Bailer-Jones , Juan D. Soler , Eleonora Zari

Distances to Bok globules and small dark nebulae are important for a variety of reasons. We provide new distance estimates to several small clouds, some of them known to harbor YSO and molecular outflows, and thus being of particular…

Astrophysics of Galaxies · Physics 2010-03-15 Jens Knude , Nadia Kaltcheva

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…

Molecular clouds are regions of dense gas and dust in space where new stars and planets are born. There is a strong correlation between the distribution of dust and molecular gas in molecular clouds. The present work focuses on the…

Astrophysics of Galaxies · Physics 2024-10-28 Rui-Zhi Li , Bing-Qiu Chen , Guang-Xing Li , Bo-Ting Wang , Hao-Ming Ren , Qi-Ning Guo

As a result of a careful selection of eclipsing binaries in the Large Magellanic Cloud using the OGLE-II photometric database, we present a list of 98 systems that are suitable targets for spectroscopic observations that would lead to the…

Astrophysics · Physics 2009-11-10 G. Michalska , A. Pigulski

The Boston University-Five College Radio Astronomy Observatory (BU-FCRAO) Galactic Ring Survey (GRS) of 13 CO (1-0) emission covers Galactic longitudes 18 deg < l < 55.7 deg and Galactic latitudes |b| <= 1 deg. Using the SEQUOIA array on…

Solar and Stellar Astrophysics · Physics 2009-11-13 J. M. Rathborne , A. M. Johnson , J. M. Jackson , R. Y. Shah , R. Simon

In order to understand the initial conditions and early evolution of star formation in a wide range of Galactic environments, we carried out an investigation of 64 \textit{Planck} Galactic Cold Clumps (PGCCs) in the second quadrant of the…

Very precise observational data are needed for studying the stellar cluster parameters (distance, reddening, age, metallicity) and cluster internal kinematics. In turn, these give us an insight into the properties of our Galaxy, for…

Astrophysics of Galaxies · Physics 2021-07-16 Martin Piecka , Ernst Paunzen

As a part of the Milky Way Imaging Scroll Painting (MWISP) survey, we performed a simultaneous 12CO(1-0), 13CO(1-0), C18O(1-0) mapping toward molecular clouds in a region encompassing 3.75 square degrees. We reveal three molecular clouds,…

Astrophysics of Galaxies · Physics 2016-03-30 Y. Gong , R. Q. Mao , M. Fang , S. B. Zhang , Y. Su , J. Yang , Z. B. Jiang , Y. Xu , M. Wang , Y. Wang , D. R. Lu , J. X. Sun

We present the results of the Gould's Belt Distances Survey (GOBELINS) of young star forming regions towards the Orion Molecular Cloud Complex. We detected 36 YSOs with the Very Large Baseline Array (VLBA), 27 of which have been observed in…