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We present a large scale survey of CO outflows in the Gem OB1 molecular cloud complex and its surroundings using the Purple Mountain Observatory Delingha 13.7 m telescope. A total of 198 outflow candidates were identified over a large area…

Astrophysics of Galaxies · Physics 2018-03-21 Yingjie Li , Fa-Cheng Li , Ye Xu , Chen Wang , Xin-Yu Du , Wenjin Yang , Ji Yang

From our catalog of Milky Way molecular clouds, created using a temperature thresholding algorithm on the Bell Laboratories 13CO Survey, we have extracted two subsets:(1) Giant Molecular Clouds (GMCs), clouds that are definitely larger than…

Astrophysics · Physics 2016-08-30 Antony A. Stark , Youngung Lee

In this paper we present the distribution of molecular gas in the Milky Way Galactic plane from $l$ = [59.75, 74.75]$^{\circ}$ and $b$ = [${-}$5.25, +5.25]$^{\circ}$, using the MWISP $^{12}$CO/$^{13}$CO/$\rm {C}^{18}{O}$ emission line data.…

Astrophysics of Galaxies · Physics 2023-08-02 Chunxue Li , Hongchi Wang , Yuehui Ma , Lianghao Lin , Yang Su , Chong Li , Yan Sun , Xin Zhou , Ji Yang

We present 45"-47" angular resolution maps at 50" sampling of the 12CO and 13CO J=1-0 emission toward a 1.39 deg x 1.33 deg region in the W51 HII region complex. These data permit the spatial and kinematic separation of several spectral…

Astrophysics · Physics 2009-10-30 John M. Carpenter , D. B. Sanders

Molecular clouds (MCs) are cradles of star and planet formation, thereby playing an important role in the evolution of galaxies. Based on the unbiased Milky Way Imaging Scroll Painting (MWISP) survey data of $^{12}$CO, $^{13}$CO, and…

Astrophysics of Galaxies · Physics 2025-08-21 Xin Zhou , Ji Yang , Yan Sun , Qing-Zeng Yan , Lixia Yuan , Yang Su , Xuepeng Chen , Shaobo Zhang

We present sensitive and high angular resolution CO(1-0) data obtained by the Combined Array for Research in Millimeter-wave Astronomy (CARMA) observations toward the nearby grand-design spiral galaxy M 51. The angular resolution of 0.7"…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-20 Fumi Egusa , Jin Koda , Nick Scoville

We present new observations of a 2' field in the north-eastern spiral arm of M31. In the 0.8 x 3.6 kpc mosaicked region, we have detected six distinct, large complexes of molecular gas, most of which lie along the spiral arm dust lane or in…

Astrophysics · Physics 2007-05-23 Kartik Sheth , Stuart N. Vogel , Christine D. Wilson , T. M. Dame

Filamentary flows toward the centre of molecular clouds have been recognized as a crucial process in the formation and evolution of stellar clusters. In this paper, we present a comprehensive observational study that investigates the gas…

Astrophysics of Galaxies · Physics 2024-01-12 Vineet Rawat , M. R. Samal , D. L. Walker , D. K. Ojha , A. Tej , A. Zavagno , C. P. Zhang , Davide Elia , S. Dutta , J. Jose , C. Eswaraiah , E. Sharma

Based on high-latitude molecular clouds with highly accurate distance estimates taken from the literature, we have redetermined the parameters of their spatial orientation. This system can be approximated by a 350x235x140 pc ellipsoid…

Astrophysics of Galaxies · Physics 2016-07-04 V. V. Bobylev

We report molecular line and dust continuum observations toward the high-mass star forming region G331.5-0.1, one of the most luminous regions of massive star-formation in the Milky Way, located at the tangent region of the Norma spiral…

Astrophysics of Galaxies · Physics 2015-06-16 Manuel Merello , Leonardo Bronfman , Guido Garay , Lars-Ake Nyman , Neal J. Evans , C. Malcolm Walmsley

We present the results of an unbiased $^{12}$CO/$^{13}$CO/C$^{18}$O ($J$ = 1-0) survey in a portion of the third Galactic quadrant (TGQ): $l$ = [219.75, 229.75]$^\circ$ and $b$ = [-5.25, 5.25]$^\circ$. The high-resolution and…

Astrophysics of Galaxies · Physics 2023-08-22 Yiwei Dong , Yan Sun , Ye Xu , Zehao Lin , Shuaibo Bian , Chaojie Hao , Dejian Liu , Yingjie Li , Ji Yang , Yang Su , Xin Zhou , Shaobo Zhang , Qing-Zeng Yan , Zhiwei Chen

We have mapped two molecular clouds at (l, b) = (3.2 degrees, + 0.3 degrees) and (l, b) = (5.4 degrees, -0.5 degrees) in 21-cm line and continuum emission. These clouds show unusually large velocity dispersions of more than 100 km/s (FWHM)…

Astrophysics · Physics 2015-06-24 Harald Riffert , Pawan Kumar , W. K. Huchtmeier

We present high-resolution (~ 4") 12CO (J = 1 - 0) mapping observations with high - velocity resolution (~ 2.6 km s^{-1}) toward the disk of flocculent galaxy NGC 5055, using the Nobeyama Millimeter Array in order to study the physical…

Astrophysics · Physics 2015-06-24 Tomoka Tosaki , Yasuhiro Shioya , Nario Kuno , Kouichiro Nakanishi , Takashi Hasegawa

We present 12CO J=1-0 observations from the Caltech Millimeter Array of a field in the nearby spiral galaxy M81. We detect emission from three features that are the size of large giant molecular clouds (GMCs) in the Milky Way Galaxy and…

Astrophysics · Physics 2016-08-30 C. L. Taylor , C. D. Wilson

We perform a comprehensive CO study toward the Monoceros OB1 (Mon OB1) region based on the MWISP survey at an angular resolution of about $50''$. The high-sensitivity data, together with the high dynamic range, shows that molecular gas in…

Astrophysics of Galaxies · Physics 2024-05-16 Zi Zhuang , Yang Su , Shiyu Zhang , Xuepeng Chen , Qing-Zeng Yan , Haoran Feng , Li Sun , Xiaoyun Xu , Yan Sun , Xin Zhou , Hongchi Wang , Ji Yang

We present a catalogue of Giant Molecular Clouds (GMCs) in M33, extracted from cold dust continuum emission. Our GMCs are identified by computing dendrograms. We measure the spatial distribution of these clouds, and characterise their dust…

Astrophysics of Galaxies · Physics 2018-12-31 Thomas G. Williams , Walter K. Gear , Matthew W. L. Smith

We present large-field (4.25~$\times$~3.75 deg$^2$) mapping observations toward the Galactic region centered at $l = 150\arcdeg, b = 3.5\arcdeg$ in the $J = 1-0$ emission line of CO isotopologues ($^{12}$CO, $^{13}$CO, and C$^{18}$O), using…

Astrophysics of Galaxies · Physics 2017-03-27 Fang Xiong , Xuepeng Chen , Ji Yang , Min Fang , Shaobo Zhang , Miaomiao Zhang , Xinyu Du , Wenshan Long

Current observations favour that the massive ultraviolet-bright clumps with a median stellar mass of $\sim 10^7~M_{\odot}$, ubiquitously observed in $z\sim 1-3$ galaxies, are star-forming regions formed in-situ in galaxies. It has been…

We present the result of an unbiased CO survey in Galactic range of 34.75$^{\circ}\leq$l$\leq$ 45.25$^{\circ}$ and -5.25$^{\circ}\leq$b$\leq$ 5.25$^{\circ}$, and velocity range beyond the Outer arm. A total of 168 molecular clouds (MCs) are…

Astrophysics of Galaxies · Physics 2017-06-21 Yan Sun , Yang Su , Shao-Bo Zhang , Ye Xu , Xue-Peng Chen , Ji Yang , Zhi-Bo Jiang , Min Fang

We present 12CO(1->0) observations of 45 giant molecular clouds in M33 made with the BIMA array. The observations have a linear resolution of 20 pc, sufficient to measure the sizes of most GMCs in the sample. We place upper limits on the…

Astrophysics · Physics 2009-11-10 Erik Rosolowsky , Greg Engargiola , Richard Plambeck , Leo Blitz
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