First embedded cluster formation in California molecular cloud
arXiv:2003.09811 · doi:10.3847/2041-8213/ab830e
Abstract
We performed a multi-wavelength observation toward LkHa 101 embedded cluster and its adjacent 85arcmin*60arcmin region. The LkHa 101 embedded cluster is the first and only one significant cluster in California molecular cloud (CMC). These observations have revealed that the LkHa 101 embedded cluster is just located at the projected intersectional region of two filaments. One filament is the highest-density section of the CMC, the other is a new identified filament with a low-density gas emission. Toward the projected intersection, we find the bridging features connecting the two filaments in velocity, and identify a V-shape gas structure. These agree with the scenario that the two filaments are colliding with each other. Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), we measured that the RRL velocity of the LkHa 101 H II region is 0.5 km/s, which is related to the velocity component of the CMC filament. Moreover, there are some YSOs distributed outside the intersectional region. We suggest that the cloud-cloud collision together with the fragmentation of the main filament may play an important role in the YSOs formation of the cluster.
6 pages, 5 figures, accepted for publication in ApJL
References in corpus (25)
- The Wide-field Infrared Survey Explorer (WISE): Mission Description and Initial On-orbit Performance
- Embedded Clusters in Molecular Clouds
- From filamentary clouds to prestellar cores to the stellar IMF: Initial highlights from the Herschel Gould Belt survey
- Toward Understanding Massive Star Formation
- Star Formation in a Crossing Time
- Filamentary structure of star-forming complexes
- Filamentary Accretion Flows in the Embedded Serpens South Protocluster
- Formation of Massive Molecular Cloud Cores by Cloud-cloud Collision
- Equilibrium Star Cluster Formation
- Molecular clouds towards RCW 49 and Westerlund 2; Evidence for cluster formation triggered by cloud-cloud collision
- Molecular Clouds Toward the Super Star Cluster NGC3603; Possible Evidence for a Cloud-Cloud Collision in Triggering the Cluster Formation
- The California Molecular Cloud
- Isolating signatures of major cloud-cloud collisions using position-velocity diagrams
- The two molecular clouds in RCW 38; evidence for formation of the youngest super star cluster in the Milky Way triggered by cloud-cloud collision
- No wide spread of stellar ages in the Orion Nebula Cluster
- A new look at the molecular gas in M42 and M43; possible evidence for cloud-cloud collision which triggered formation of the OB stars in the Orion Nebula Cluster
- Triggered O star formation in M20 via cloud-cloud collision: Comparisons between high-resolution CO observations and simulations
- Age Gradients in the Stellar Populations of Massive Star Forming Regions Based on a New Stellar Chronometer
- A First Look at the Auriga-California Giant Molecular Cloud With Herschel and the CSO: Census of the Young Stellar Objects and the Dense Gas
- HP2 survey: III The California Molecular Cloud--A Sleeping Giant Revisited
- L1188: a promising candidate of cloud-cloud collision triggering the formation of the low- and intermediate-mass stars
- Physical properties and chemical composition of the cores in the California molecular cloud
- Filament L1482 in the California molecular cloud
- Earliest Stages of Protocluster Formation: Substructure and Kinematics of Starless Cores in Orion
- VLBA Determination of the Distance to Nearby Star-forming Regions. VIII. The LkH 101 cluster