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相关论文: 2MASS wide field extinction maps: V. Corona Austra…

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We present ALMA observations of 30 Doradus -- the highest resolution view of molecular gas in an extragalactic star formation region to date (~0.4pc x 0.6pc). The 30Dor-10 cloud north of R136 was mapped in 12CO 2-1, 13CO 2-1, C18O 2-1,…

[Abridged] We present first results from a large-area (~80degx20deg), sparsely sampled two-filter (B,R) imaging survey towards the Canis Major stellar over-density, claimed to be a disrupting Milky Way satellite galaxy. Utilizing stellar…

天体物理学 · 物理学 2008-11-26 D. J. Butler , D. Martinez-Delgado , H-W. Rix , J. Penarrubia , J. T. A. de Jong

Using a combination of data from the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO), the Arizona Radio Observatory Kitt Peak 12m telescope and the Arizona Radio Observatory 10m Heinrich Hertz Telescope, we have studied…

天体物理学 · 物理学 2009-11-10 Christopher Groppi , Craig Kulesa , Christopher Walker , Christopher Martin

We combined sensitive near-infrared data obtained with ground-based imagers on the ESO NTT and VLT telescopes with space mid-infrared data acquired with the IRAC imager on the Spitzer Space Telescope to calculate the extinction law…

天体物理学 · 物理学 2015-05-13 C. Román-Zúñiga , C. Lada , A. Muench , J. Alves

We present a millimeter wave study of a cluster of bipolar CO outflows embedded in the western end of the Circinus molecular cloud complex, G317-4, that is traced by very high optical extinction. For an assumed distance of 700 pc, the…

天体物理学 · 物理学 2014-10-13 John Bally , Bo Reipurth , Charles J. Lada , Youssef Billawala

The origin of the chemical diversity observed around low-mass protostars probably resides in the earliest history of these systems. We aim to investigate the impact of protostellar feedback on the chemistry and grain growth in the…

We present a near-infrared extinction study of the dark globule B335, a protostellar collapse candidate, using data from HST/NICMOS and the W.M. Keck Observatory. These data allow a new quantitative test of the "inside-out" collapse model…

天体物理学 · 物理学 2009-11-07 Daniel W. A. Harvey , David J. Wilner , Charles J. Lada , Philip C. Myers , Joao F. Alves , Hua Chen

The R Coronae Australis dark cloud is one of the closest star-forming regions to the Sun. The cloud is known to be very active in star formation, harboring many Herbig-Haro objects (HHs) and Molecular Hydrogen emission-line Objects (MHOs).…

星系天体物理 · 物理学 2016-03-16 S. Paron , M. Celis Peña , M. E. Ortega , M. Cunningham , P. A. Jones , M. Rubio

Context. Pre-stellar cores are the birthplaces of Sun-like stars and represent the initial conditions for the assembly of protoplanetary systems. Due to their short lifespans, they are rare. In recent efforts to increase the number of such…

太阳与恒星天体物理 · 物理学 2025-04-23 E. Redaelli , S. Spezzano , P. Caselli , J. Harju , D. Arzoumanian , O. Sipilä , A. Belloche , F. Wyrowski , J. E. Pineda

We study the probability distribution function (PDF) of mass surface densities, $\Sigma$, of infrared dark cloud (IRDC) G028.37+00.07 and its surrounding giant molecular cloud. This PDF constrains the physical processes, such as turbulence,…

星系天体物理 · 物理学 2016-09-23 Wanggi Lim , Jonathan C. Tan , Jouni Kainulainen , Bo Ma , Michael J. Butler

We present a study of the detailed distribution of extinction in a region of the Taurus dark cloud complex. Our study uses new BVR images of the region, spectral classification data for 95 stars, and IRAS Sky Survey Atlas (ISSA) 60 and 100…

天体物理学 · 物理学 2009-10-31 Hector G. Arce , Alyssa A. Goodman

A deep, wide-field, near-infrared imaging survey was used to construct an extinction map of the southeastern part of the California Molecular Cloud (CMC) with $\sim$ 0.5 arc min resolution. The same region was also surveyed in the…

星系天体物理 · 物理学 2015-05-27 S. Kong , C. J. Lada , E. A. Lada , C. Román-Zúñiga , J. H. Bieging , M. Lombardi , J. Forbrich , J. F. Alves

We report observations of the J =(1--0) C18O molecular emission line toward the L977 molecular cloud. To study the correlation between C18O emission and dust extinction we constructed a Gaussian smoothed map of the infrared extinction…

天体物理学 · 物理学 2009-10-30 J. Alves , C. Lada , E. Lada

An improved high-resolution and deep A$_{Ks}$ foreground dust extinction map is presented for the Galactic disk area within $295^{\circ} \lesssim l \lesssim 350^{\circ}$, $-1.0^{\circ} \lesssim b \lesssim +1.0^{\circ}$. At some longitudes…

Data from the Five College Radio Astronomy Observatory CO Mapping Survey of the Taurus molecular cloud are combined with extinction data for a sample of 292 background field stars to investigate the uptake of CO from the gas to icy grain…

星系天体物理 · 物理学 2010-07-20 D. C. B. Whittet , P. F. Goldsmith , J. L. Pineda

We present three 14400 square degree relative extinction maps of the Galactic Plane (|b|<20degrees) obtained from 2MASS using accumulative star counts (Wolf diagrams). This method is independent of the colour of the stars and the variation…

天体物理学 · 物理学 2009-11-10 D. Froebrich , T. P. Ray , G. C. Murphy , A. Scholz

Detailed magnetic field structure of the dense core SL42 (CrA-E) in the Corona Australis molecular cloud complex was investigated based on near-infrared polarimetric observations of background stars to measure dichroically polarized light…

We have studied the interstellar extinction in a field of ~3' x 3' at the core of the 30 Doradus nebula, including the central R136 cluster, in the Large Magellanic Cloud. Observations at optical and near-infrared wavelengths, obtained with…

太阳与恒星天体物理 · 物理学 2015-06-22 Guido De Marchi , Nino Panagia

We report on ALMA ACA observations of a high-density region of the Corona Australis cloud forming a young star cluster, and the results of resolving internal structures. In addition to embedded Class 0/I protostars in continuum, a number of…