中文
相关论文

相关论文: New Results on the Submillimeter Polarization Spec…

200 篇论文

We investigate the intrinsic shapes of starless cores in the Orion GMC, using the prestellar core sample of Nutter and Ward-Thompson (2007), which is based on submillimeter SCUBA data. We employ a maximum-likelihood method to reconstruct…

天体物理学 · 物理学 2009-06-23 Konstantinos Tassis

We present a fully sampled map covering the Orion Hot Core and dense molecular ridge, in the sub-millimeter J=6-5 rotational transition of 13CO, at 0.45 mm with a resolution of 13 arcsec and 0.5 km s^-1. The map covers 3 arc min by 2arc min…

太阳与恒星天体物理 · 物理学 2015-05-20 T. L. Wilson , D. Muders , M. Dumke , C. Henkel , Jonathan H. Kawamura

We present a polarimetric map of a 20'x20' area toward the Galactic center. The polarization of point sources has been measured in the J, H, and Ks bands using the near-infrared polarimetric camera SIRPOL on the 1.4 m telescope IRSF. One…

We present the first far infrared (FIR) dust emission polarization map covering the full extent Milky Way's Central molecular zone (CMZ). The data, obtained with the PILOT balloon-borne experiment, covers the Galactic Center region…

We have studied optical properties of interstellar dust around the Orion A molecular cloud to investigate the size distribution and the composition of dust grains. Orion A is one of the most studied molecular clouds in the solar vicinity…

星系天体物理 · 物理学 2021-07-12 Hayato Uehara , Kazuhito Dobashi , Shingo Nishiura , Tomomi Shimoikura , Takahiro Naoi

Using the $\approx$15km ALMA long baselines, we imaged the Stokes $I$ emission and linearly polarized intensity ($PI$) in the 1.1-mm continuum band of a very young intermediate-mass protostellar source, MMS 6, in the Orion Molecular…

Stars are born in dense cores of molecular clouds. The core mass function (CMF), which is the mass distribution of dense cores, is important for understanding the stellar initial mass function (IMF). We obtained 350 $\mu$m dust continuum…

太阳与恒星天体物理 · 物理学 2014-04-10 Guoyin Zhang , Di Li , Ashley K. Hyde , Lei Qian , Hualei Lyu , Zhongzu Wu

We have observed molecular cloud cores in the Orion A giant molecular cloud (GMC) in CCS, HC3N, DNC, and HN13C to study their chemical characteristics. We have detected CCS in the Orion A GMC for the first time. CCS was detected in about a…

星系天体物理 · 物理学 2015-05-20 Ken'ichi Tatematsu , Tomoya Hirota , Ryo Kandori , Tomofumi Umemoto

We present the first resolved map of plane-of-sky magnetic field strength for a quiescent molecular cloud. GRSMC 45.60+0.30 subtends 40 x 10 pc at a distance of 1.88 kpc, masses 16,000 M_sun, and exhibits no star formation. Near-infrared…

星系天体物理 · 物理学 2012-08-31 Robert C. Marchwinski , Michael D. Pavel , Dan P. Clemens

We assume a distribution of clouds optically thick for electron scattering (OTCM) which are moderately optically thin for absorption and we consider them as a model of the mean quasar spectrum of Laor et al. (1997). We show that the model…

天体物理学 · 物理学 2007-05-23 B. Czerny , A. -M. Dumont

We present here the first results from a high-resolution survey of the 12CO(J=1-0) emission across the northern part of the poorly-enriched Small Magellanic Cloud, made with the ATNF Mopra telescope. Three molecular complexes detected in…

星系天体物理 · 物理学 2015-05-18 E. Muller , J. Ott , A. Hughes , J. Pineda , T. Wong , N. Mizuno , A. Kawamura , Y. Mizuno , Y. Fukui , T. Onishi , M. Rubio

Dust grains are important in various astrophysical processes and serve as indicators of interstellar medium structures, density, and mass. Understanding their physical properties and chemical composition is crucial in astrophysics. Dust…

The Orion Molecular Cloud complex, one of the nearest (D = 406 pc) and most extensively studied massive star-forming regions, is ideal for constraining the physics of stellar feedback, but its ~12 deg diameter on the sky requires a…

In the framework of the silicate core-carbonaceous organic mantle interstellar dust model, the bulk of the visual/near-IR extinction and the entire polarization are from nonspherical and aligned core-mantle grains. The 3.4 micron C-H and…

天体物理学 · 物理学 2009-11-07 Aigen Li , J. Mayo Greenberg

We report new spectral types or spectral classification constraints for over 600 stars in the Orion Nebula Cluster (ONC) based on medium resolution R~ 1500-2000 red optical spectra acquired using the Palomar 200" and Kitt Peak 3.5m…

太阳与恒星天体物理 · 物理学 2015-06-16 Lynne A. Hillenbrand , Aaron S. Hoffer , Gregory J. Herczeg

We have carried out near-infrared polarimetry toward the boundary of the Central Molecular Zone, in the field of (-1.4 deg $\lesssim l \lesssim$ -0.3 deg and 1.0 deg $\lesssim l \lesssim$ 2.9 deg, $|b|\lesssim$ 0.1 deg), using the…

星系天体物理 · 物理学 2015-06-19 Tatsuhito Yoshikawa , Shogo Nishiyama , Motohide Tamura , Jungmi Kwon , Tetsuya Nagata

We report Submillimeter Array dust continuum and molecular spectral line observations toward the Orion Bar photon-dominated region (PDR). The 1.2 mm continuum map reveals, for the first time, a total of 9 compact (r < 0.01pc) dust…

太阳与恒星天体物理 · 物理学 2018-03-08 Keping Qiu , Zeqiang Xie , Qizhou Zhang

A 20 arcmin \times 20 arcmin region around 30 Doradus in the Large Magellanic Cloud (LMC) is observed and analyzed in the near-infrared. We obtain polarimetry data in the J, H, and K_s bands using the SIRIUS polarimeter SIRPOL at the…

宇宙学与河外天体物理 · 物理学 2011-10-21 Kim Jaeyeong , Pak Soojong , Choi Minho , Kang Wonseok , Kandori Ryo , Tamura Motohide , Nagata Tetsuya , Kwon Jungmi , Kato Daisuke , Daniel T Jaffe

We studied the filament structures and dense cores in OMC-2,3 region in Orion A North molecular cloud using the high-resolution N2H+ (1-0) spectral cube observed with the Atacama Large Millimeter/Submillimeter Array (ALMA). The filament…