A large-scale survey of CO and its isotopologues toward the Rosette molecular cloud

Abstract

Using the PMO-13.7m millimeter telescope at Delingha in China, we have conducted a large-scale simultaneous survey of ${}^{12}$CO, ${}^{13}$CO, and C${}^{18}$O J=1-0 emission toward the Rosette molecular cloud (RMC) region with a sky coverage of 3.5 $\times$ 2.5 deg${}^2$. The majority of the emission in the region comes from the RMC complex with velocities lying in the range from -2 km s${}^{-1}$ to 20.5 km s${}^{-1}$. Beyond this velocity range, 73 molecular clumps are identified with kinematic distances from 2.4 kpc to 11 kpc. Based on the spatial and velocity distribution, nine individual clouds, C1-C9, have been identified for the RMC complex. It appears that the C3 cloud is different from other clouds in the RMC complex in view of its characteristic velocity, excitation temperature, and velocity dispersion. Most of the young stellar clusters in the region are located in positions of both high column density and high excitation temperature. Seven new molecular filaments are discovered in the RMC complex. Evidence for cloud-cloud collision is found in the region of young stellar clusters REFL9 and PouF, showing that these young stellar clusters probably result from a cloud-cloud collision. The abundance ratios of ${}^{13}$CO to C${}^{18}$O in the region have a mean value of 13.7 which is 2.5 times larger than the solar system value, showing that UV photons from the nearby OB clusters have strong influence on the chemistry of clouds in the RMC complex.

28 pages, 25 figures. Accepted for publication in ApJS

References in corpus (14)

• Trigonometric Parallaxes of Massive Star Forming Regions: VI. Galactic Structure, Fundamental Parameters and Non-Circular Motions
• The relation between gas and dust in the Taurus Molecular Cloud
• Molecular clouds towards RCW 49 and Westerlund 2; Evidence for cluster formation triggered by cloud-cloud collision
• FellWalker - a Clump Identification Algorithm
• Isolating signatures of major cloud-cloud collisions using position-velocity diagrams
• High abundance ratio of ${}^{13}$CO to C${}^{18}$O toward photon-dominated regions in the Orion-A giant molecular cloud
• A FLAMINGOS Deep Near Infrared Imaging Survey of the Rosette Complex I: Identification and Distribution of the Embedded Population
• L1188: a promising candidate of cloud-cloud collision triggering the formation of the low- and intermediate-mass stars
• A large-scale CO survey of the Rosette Molecular Cloud: assessing the effects of O stars on surrounding molecular gas
• Numerical Simulations of Turbulent Molecular Clouds Regulated by Radiation Feedback Forces II: Radiation-Gas Interactions and Outflows
• Molecular clouds and star formation toward the Galactic plane within 216.25${}^{\mathrm{o}}\le$ l $\le$218.75${}^{\mathrm{o}}$ and $-$0.75${}^{\mathrm{o}}\le$ b $\le$1.25${}^{\mathrm{o}}$
• Molecular Environments of Three Large Supernova Remnants in the Third Galactic Quadrant: G205.5+0.5, G206.9+2.3, and G213.0-0.6
• Rosette Globulettes and Shells in the Infrared
• Rosette nebula globules: Seahorse giving birth to a star

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