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相关论文: Application of Convolutional Neural Networks to Id…

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We adopt the deep learning method CASI-3D (Convolutional Approach to Structure Identification-3D) to systemically identify protostellar outflows in 12CO and 13CO observations of the nearby molecular clouds, Ophiuchus, Taurus, Perseus and…

星系天体物理 · 物理学 2022-02-16 Duo Xu , Stella Offner , Robert Gutermuth , Shuo Kong , Hector G. Arce

We adopt the deep learning method CASI (Convolutional Approach to Shell Identification) and extend it to 3D (CASI-3D) to identify signatures of stellar feedback in molecular line spectra, such as 13CO. We adopt magneto-hydrodynamics…

星系天体物理 · 物理学 2020-02-19 Duo Xu , Stella S. R. Offner , Robert Gutermuth , Colin Van Oort

We adopt the deep learning method CASI-3D (Convolutional Approach to Structure Identification-3D) to infer the orientation of magnetic fields in sub-/trans- Alfvenic turbulent clouds from molecular line emission. We carry out…

星系天体物理 · 物理学 2023-01-25 Duo Xu , Chi-Yan Law , Jonathan C. Tan

We present a search for outflows towards 51 submillimetre cores in Perseus. With consistently derived outflow properties from a large homogeneous dataset within one molecular cloud we can investigate further the mass dependence and time…

天体物理学 · 物理学 2009-11-13 J. Hatchell , G. A. Fuller , J. S. Richer

Molecular outflows provide an alternative method of identifying protostellar cores, complementary to recent mid-infrared studies. Continuing our studies of Perseus, we investigate whether all Spitzer-identified protostars, and particularly…

星系天体物理 · 物理学 2015-05-13 Jennifer Hatchell , Michael M. Dunham

We present the results of a large-scale survey of the very dense gas in the Perseus molecular cloud using HCO+ and HCN (J = 4 - 3) transitions. We have used this emission to trace the structure and kinematics of gas found in pre- and…

星系天体物理 · 物理学 2015-06-19 S. L. Walker-Smith , J. S. Richer , J. V. Buckle , J. Hatchell , E. Drabek-Maunder

We present a study on the impact of molecular outflows in the Perseus molecular cloud complex using the COMPLETE survey large-scale 12CO(1-0) and 13CO(1-0) maps. We used three-dimensional isosurface models generated in RA-DEC-Velocity space…

太阳与恒星天体物理 · 物理学 2015-03-17 Hector G. Arce , Michelle A. Borkin , Alyssa A. Goodman , Jaime E. Pineda , Michael W. Halle

We present a census of molecular outflows across four active regions of star formation in the Perseus molecular cloud (NGC 1333, IC348/HH211, L1448 and L1455), totalling an area of over 1000 sq arcmin. This is one of the largest surveys of…

星系天体物理 · 物理学 2015-05-19 Emily I. Curtis , John S. Richer , Jonathan J. Swift , Jonathan P. Williams

In this paper, we perform an analysis of 13 outflows in the Cygnus X star-forming region. We use the James Clerk Maxwell Telescope observations of $^{13}$CO(3-2) and C$^{18}$O(3-2) molecular emission lines combined with archival…

星系天体物理 · 物理学 2021-04-26 Soumen Deb , Roland Kothes , Erik Rosolowsky

We utilize techniques from deep learning to identify signatures of stellar feedback in simulated molecular clouds. Specifically, we implement a deep neural network with an architecture similar to U-Net and apply it to the problem of…

天体物理仪器与方法 · 物理学 2019-08-07 Colin M. Van Oort , Duo Xu , Stella S. R. Offner , Robert A. Gutermuth

We identify 45 protostellar outflows in CO maps of the Orion A giant molecular cloud from the CARMA-NRO Orion survey. Our sample includes 11 newly detected outflows. We measure the mass and energetics of the outflows, including material at…

We present results from three-dimensional, self-gravitating, radiation-hydrodynamic simulations of low-mass protostellar outflows. We construct synthetic observations in 12CO in order to compare with observed outflows and evaluate the…

太阳与恒星天体物理 · 物理学 2015-05-30 S. S. R. Offner , E. J. Lee , A. A. Goodman , H. Arce

We present a study of molecular outflows using six molecular lines (including 12CO/13CO/C18O/HCO+(J = 1-0) and SiO/CS(J = 2-1)) toward nine nearby high-mass star-forming regions with accurate known distances. This work is based on the…

星系天体物理 · 物理学 2021-03-10 De-Jian Liu , Ye Xu , Ying-Jie Li , Sheng Zheng , Deng-Rong Lu , Chao-Jie Hao , Ze-Hao Lin , Shuai-Bo Bian , Li-Ming Liu

To test theoretical models of massive star formation it is important to compare their predictions with observed systems. To this end, we conduct CO molecular line radiative transfer post-processing of 3D magneto-hydrodynamic (MHD)…

星系天体物理 · 物理学 2024-03-11 Duo Xu , Jonathan C. Tan , Jan E. Staff , Jon P. Ramsey , Yichen Zhang , Kei E. Tanaka

Characterizing protostellar outflows is fundamental to understanding star formation feedback, yet traditional methods are often hindered by projection effects and complex morphologies. We present a multi-modal deep learning framework that…

星系天体物理 · 物理学 2026-03-12 Duo Xu , Ioana A. Stelea , Joshua S. Speagle , Yichen Zhang , Jonathan C. Tan

Jets and outflows are the early signposts of stellar birth. Using the UKIRT Wide Field Infrared Survey for H2 (UWISH2) at 2.12 micron, 127 outflows are identified in molecular cloud complexes Vulpecula OB1 and IRDC G53.2 covering 12 square…

星系天体物理 · 物理学 2024-03-22 Manish Chauhan , Manash Samal , Anandmayee Tej , Dirk Froebrich

To date, few studies have focused on protostellar outflow feedback at scales larger than several parsecs. To address this paucity of research, we investigate the effects of feedback from CO outflow candidates on their parent clouds over…

星系天体物理 · 物理学 2020-12-16 Yingjie Li , Ye Xu , Yan Sun , Ji Yang

Hydrodynamic simulations can connect outflow observables to the physical conditions of outflowing gas. Here, we use simulations of isolated disk galaxies ranging from dwarf mass ($M_{200} = 10^{10}\mathrm{M}_{\odot}$) to Milky Way mass…

Ten protostellar outflows in the Orion molecular clouds were mapped in the $^{12}$CO/$^{13}$CO ${J=6\rightarrow5}$ and $^{12}$CO ${J=7\rightarrow6}$ lines. The maps of these mid-$J$ CO lines have an angular resolution of about 10$''$ and a…

We present a survey of molecular outflows across the dark cloud complex in the Cygnus region, based on 46.75 deg^2 field of CO isotopologues data from Milky Way Imaging Scroll Painting (MWISP) survey. A supervised machine learning…

太阳与恒星天体物理 · 物理学 2020-05-13 Shaobo Zhang , Ji Yang , Ye Xu , Xuepeng Chen , Yang Su , Yan Sun , Xin Zhou , Yingjie Li , Dengrong Lu
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