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

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With recent Herschel observations, the northern filament of the Corona Australis cloud has now been mapped in a number of bands from 1.2um to 870um. The data set provides a good starting point for the study of the cloud over several orders…

星系天体物理 · 物理学 2015-06-05 M. Juvela , V. -M. Pelkonen , G. J. White , V. Konyves , J. Kirk , P. Andre

To understand low- to intermediate-mass star-formation in the nearby R CrA molecular cloud, we try to identify the stellar content that is accessible with near-infrared observations. We obtained a JHK band mosaic of 10 x 60 arcmin square…

天体物理学 · 物理学 2009-11-13 M. Haas , F. Heymann , I. Domke , H. Drass , R. Chini , V. Hoffmeister

We study a northern part of the Corona Australis molecular cloud that consists of a filament and a dense sub-millimetre core inside the filament. Our aim is to measure dust temperature and sub-mm emissivity within the region. We also look…

星系天体物理 · 物理学 2015-05-13 Mika Juvela , Veli-Matti Pelkonen , Sebastian Porceddu

We present a near-infrared extinction map of a large region (approximately 2200 deg^2) covering the Orion, the Monoceros R2, the Rosette, and the Canis Major molecular clouds. We used robust and optimal methods to map the dust column…

星系天体物理 · 物理学 2015-05-28 Marco Lombardi , Joao Alves , Charles lada

Chemical reactions in starless molecular clouds are heavily dependent on interactions between gas phase material and solid phase dust and ices. We have observed the abundance and distribution of molecular gases in the cold, starless core DC…

星系天体物理 · 物理学 2013-01-15 E. E. Hardegree-Ullman , J. Harju , M. Juvela , O. Sipila , D. C. B. Whittet , S. Hotzel

We present an extinction map of a ~1,700 deg sq region that encloses the Ophiuchus, the Lupus, and the Pipe dark complexes using 42 million stars from the Two Micron All Sky Survey (2MASS) point source catalog. The use of a robust and…

天体物理学 · 物理学 2008-09-23 Marco Lombardi , Charles J. Lada , Joao Alves

Aims: We derive the probability density functions (PDFs) of column density for a complete sample of prominent molecular cloud complexes closer than 200 pc. Methods: We derive near-infrared dust extinction maps for 23 molecular cloud…

星系天体物理 · 物理学 2015-05-14 J. Kainulainen , H. Beuther , T. Henning , R. Plume

We are studying the column density distribution of all nearby giant molecular clouds. As part of this project we generated several all sky extinction maps. They are calculated using the median near infrared colour excess technique applied…

星系天体物理 · 物理学 2009-11-13 J. Rowles , D. Froebrich

The viability of the star count (Wolf) method is assessed as a means of constraining the near-infrared (NIR) extinction law toward the Corona Australis molecular cloud. Using deep $JHK_S$ photometry from the VISIONS survey, extinction maps…

星系天体物理 · 物理学 2025-07-01 Botao Jiang , Jun Li , Xi Chen

At a distance of about 130 pc, the Corona Australis molecular cloud complex is one of the nearest regions with ongoing and/or recent star formation. It is a region with highly variable extinction of up to AV~45 mag, containing, at its core,…

天体物理学 · 物理学 2008-08-26 Ralph Neuhäuser , Jan Forbrich

We present new high resolution and dynamic range dust column density and temperature maps of the California Molecular Cloud derived from a combination of Planck and Herschel dust-emission maps, and 2MASS NIR dust-extinction maps. We used…

星系天体物理 · 物理学 2017-10-25 Charles J. Lada , John A. Lewis , Marco Lombardi , João Alves

With current near-infrared (NIR) instruments the near-infrared light scattered from interstellar clouds can be mapped over large areas. The surface brightness carries information on the line-of-sight dust column density. Therefore,…

天体物理学 · 物理学 2009-11-13 M. Juvela , V. -M. Pelkonen , P. Padoan , K. Mattila

We present a 8 deg x 6 deg, high resolution extinction map of the Pipe nebula using 4.5 million stars from the Two Micron All Sky Survey (2MASS) point source catalog. The use of NICER, a robust and optimal technique to map the dust column…

天体物理学 · 物理学 2009-11-11 Marco Lombardi , Joao Alves , Charles J. Lada

We use deep $8\:\mu m$ Spitzer-IRAC imaging of a massive Infrared Dark Cloud (IRDC) G028.37+00.07 to construct a Mid-Infrared (MIR) extinction map that probes mass surface densities up to $\Sigma\:\sim 1\:\rm{g~cm^{-2}}$…

太阳与恒星天体物理 · 物理学 2015-06-18 Michael J. Butler , Jonathan C. Tan , Jouni Kainulainen

Using 12CO and 13CO observations we present column density maps of the molecular cloud (V = -135 km/s) in the direction of 1E1740.7-2942. Hydrogen column densities of the cloud scatter between (3.5 - 11) 10**22 cm-2, depending on the method…

天体物理学 · 物理学 2007-05-23 O. Vilhu , D. Hannikainen , P. Muhli , J. Huovelin , J. Poutanen , Ph. Durouchoux , P. Wallyn

We present a catalogue of prestellar and starless cores within the Corona Australis molecular cloud using photometric data from the Herschel Space Observatory. At a distance of d~130 pc, Corona Australis is one of the closest star-forming…

We have observed continuum emission at lambda = 850 microns over ~4 square degrees of the Ophiuchus star-forming cloud using SCUBA on the JCMT, producing a submillimetre continuum map twenty times larger than previous Ophiuchus surveys. Our…

天体物理学 · 物理学 2009-11-10 Doug Johnstone , James Di Francesco , Helen Kirk

Photoevaporation due to high-energy stellar photons is thought to be one of the main drivers of protoplanetary disk dispersal. The fully or partially ionized disk surface is expected to produce free-free continuum emission at centimeter…

We have performed a census of the young stellar populations near the Corona Australis molecular cloud using photometric and kinematic data from several sources, particularly Gaia EDR3, and spectroscopy of hundreds of candidate members. We…

太阳与恒星天体物理 · 物理学 2022-01-26 Taran Esplin , Kevin Luhman

We present results of a wide-field (approximately 60 x 90 pc) ALMA mosaic of CO(2-1) and $^{13}$CO(2-1) emission from the molecular cloud associated with the 30 Doradus star-forming region. Three main emission complexes, including two…

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