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We report results of observations of the GGD12-15 region, where cluster formation is actively taking place, using various molecular emission lines. The C18O (J= 1-0) emission line reveals a massive clump in the region with a mass of ~2800…

Optical and infrared polarization mapping and recent Planck observations of the filamentary cloud L1495 in Taurus show that the large-scale magnetic field is approximately perpendicular to the long axis of the cloud. We use the HAWC+…

(Abridged) Aims. We derive the physical properties of a filament discovered in the dark cometary-shaped cloud L1251. Methods. Mapping observations in the NH3(1,1) and (2,2) inversion lines, encompassing 300 positions toward L1251, were…

星系天体物理 · 物理学 2016-02-10 S. A. Levshakov , D. Reimers , C. Henkel

Magnetic fields of molecular clouds in the Central Molecular Zone (CMZ) have been relatively underobserved at sub-parsec resolution. Here we report JCMT/POL2 observations of polarized dust emission in the CMZ, which reveal magnetic field…

The outer Galaxy presents an optimal setting for investigating molecular clouds and star formation in environments with low metallicity. A total of 72 Galactic edge clouds were surveyed using the CO\,(2--1) line with the IRAM\,30\,m…

With the aim of investigating the presence of molecular and dust clumps linked to two star forming regions identified in the expanding molecular envelope of the stellar wind bubble RCW78, we analyzed the distribution of the molecular gas…

星系天体物理 · 物理学 2015-06-17 C. E. Cappa , M. Rubio , G. A. Romero , N. U. Duronea , V. Firpo

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…

Context. The polarized thermal emission from interstellar dust offers a valuable tool for probing both the dust and the magnetic field in the interstellar medium (ISM). However, existing observations only yield the total amount of dust…

星系天体物理 · 物理学 2026-01-14 Katia Ferrière , Ludovic Montier , Jean-Sébastien Carrière

We have carried out a survey of the NGC 2068 region in the Orion B molecular cloud using HARP on the JCMT, in the 13CO and C18O (J = 3-2) and H13CO+ (J = 4-3) lines. We used 13CO to map the outflows in the region, and matched them with…

星系天体物理 · 物理学 2015-06-12 S. L. Walker-Smith , J. S. Richer , J. V. Buckle , R. J. Smith , J. S. Greaves , I. A. Bonnell

We study the physical properties and 3D distribution of molecular clouds (MCs) toward the Cygnus region using the MWISP CO survey and Gaia DR3 data. Based on Gaussian decomposition and clustering for $\rm ^{13}CO$ lines, over 70% of the…

We cross-match objects from several different astronomical catalogs to determine the absolute proper proper motions of stars within the 30-arcmin radius fields of 115 Milky-Way globular clusters with the accuracy of 1--2~mas/yr. The proper…

星系天体物理 · 物理学 2018-06-13 A. A. Chemel , E. V. Glushkova , A. K. Dambis , A. S. Rastorguev , L. N. Yalyalieva

We use data on variable stars from the Optical Gravitational Lensing Experiment (OGLE III) survey to determine the three-dimensional structure of the Small Magellanic Cloud (SMC). Deriving individual distances to RR Lyrae stars and Cepheids…

星系天体物理 · 物理学 2015-06-11 Raoul Haschke , Eva K. Grebel , Sonia Duffau

OB associations are home to newly formed massive stars, whose turbulent winds and ionizing flux create H II regions rich with star formation. Studying the distribution and abundance of young stellar objects (YSOs) in these ionized bubbles…

太阳与恒星天体物理 · 物理学 2021-11-17 Abby Mintz , Joseph L. Hora , Elaine Winston

We present a large-scale mapping toward the GEM OB1 association in the galactic anti-center direction. The 9^deg * 6.5^deg area was mapped in 12CO, 13CO, and C18O with 50" angular resolution at 30" sampling. The region was divided into four…

星系天体物理 · 物理学 2017-05-22 Chen Wang , Ji Yang , Ye Xu , Facheng Li , Yang Su , Shaobo Zhang

During the course of a search for compact, isolated gas clouds moving with anomalous velocities in or near our own Galaxy (Braun and Burton 1998 A&A, in press), we have discovered, in the data of the Leiden/Dwingeloo survey (Hartmann and…

天体物理学 · 物理学 2009-10-31 W. B. Burton , R. Braun , R. A. M. Walterbos , C. G. Hoopes

We present new results on the young star population of the Lynds~1188 molecular cloud, associated with the Cepheus Bubble, a giant interstellar shell around the association Cep~OB\,2. In order to reveal the star-forming scenario of the…

太阳与恒星天体物理 · 物理学 2019-01-30 Elza Szegedi-Elek , Mária Kun , Attila Moór , Gábor Marton , Bo Reipurth

Once mixed in the ambient galactic plane stellar population, young stars are virtually indiscernible because neither their global photometric properties nor the presence of nearby gas can help to disentangle them from older ones.…

太阳与恒星天体物理 · 物理学 2010-12-10 A. Klutsch , D. Montes , P. Guillout , A. Frasca , F. -X. Pineau , N. Grosso , E. Marilli , J. López-Santiago

Our Sun lies within 300 pc of the 2.7-kpc-long sinusoidal chain of dense gas clouds known as the Radcliffe Wave. The structure's wave-like shape was discovered using 3D dust mapping, but initial kinematic searches for oscillatory motion…

We present the first galaxy evolution results from the Local Cluster Substructure Survey (LoCuSS), a multi-wavelength survey of 100 X-ray selected galaxy clusters at 0.15<z<0.30. LoCuSS combines far-UV through far-IR observations of cluster…

宇宙学与河外天体物理 · 物理学 2015-05-13 C. P. Haines , G. P. Smith , E. Egami , N. Okabe , M. Takada , R. S. Ellis , S. M. Moran , K. Umetsu

We present new trigonometric parallaxes and proper motions of young stellar objects in the Taurus molecular cloud complex from observations collected with the Very Long Baseline Array as part of the Gould's Belt Distances Survey (GOBELINS).…