Near-infrared observations of the far-infrared source V region in NGC 6334

1982 ◽  
Vol 258 ◽  
pp. 165 ◽  
Author(s):  
J. Fischer ◽  
R. R. Joyce ◽  
M. Simon ◽  
T. Simon
Keyword(s):  
Near Infrared ◽  
Far Infrared ◽  
Infrared Source ◽  
Infrared Observations ◽  
V Region ◽  
Ngc 6334

scholarly journals Accretion and Outflow Activity in the Earliest Phases of Star-Formation: CO, Sub-mm Continuum, and Near-Infrared Observations

1997 ◽  
Vol 163 ◽  
pp. 725-726
Author(s):  
K.-W. Hodapp ◽  
E. F. Ladd
Keyword(s):  
Near Infrared ◽  
Spectral Energy Distribution ◽  
Far Infrared ◽  
Point Sources ◽  
Spectral Energy ◽  
Infrared Observations ◽  
Circumstellar Material ◽  
Dense Cores ◽  
Wavelength Radiation ◽  
Main Component

Stars in the earliest phases of their formation, i.e., those accreting the main component of their final mass, are deeply embedded within dense cores of dust and molecular material. Because of the high line-of-sight extinction and the large amount of circumstellar material, stellar emission is reprocessed by dust into long wavelength radiation, typically in the far-infrared and sub-millimeter bands. Consequently, the youngest sources are strong submillimeter continuum sources, and often undetectable as point sources in the near-infrared and optical. The most deeply embedded of these sources have been labelled “Class 0” sources by André, Ward-Thompson, & Barsony (1994), in an extension of the spectral energy distribution classification scheme first proposed by Adams, Lada, & Shu (1987).

Evidence for a variable far-infrared source in NGC 6334

1979 ◽  
Vol 232 ◽  
pp. L183 ◽  
Author(s):  
B. McBreen ◽  
G. G. Fazio ◽  
M. Stier ◽  
E. L. Wright
Keyword(s):  
Far Infrared ◽  
Infrared Source ◽  
Ngc 6334

scholarly journals Near-Infrared Images of the Serpens Molecular Cloud Core

1989 ◽  
Vol 120 ◽  
pp. 227-230
Author(s):  
C. Eiroa ◽  
M. Casali
Keyword(s):  
Molecular Cloud ◽  
Large Scale ◽  
Near Infrared ◽  
Far Infrared ◽  
Infrared Images ◽  
Infrared Source ◽  
Stellar Objects ◽  
Dark Clouds ◽  
First Time ◽  
Cloud Core

ABSTRACT:Near-infrared images of the Serpens molecular cloud core have been carried out at UKIRT (Mauna Kea Observatory) using the infrared array camera, IRCAM. A large-scale diffuse nebulosity extending over the central part of the core is observed. Over 100 K-sources are detected in the 30 arc min2 cloud core. Some of them are PMS objects which were previously unknown. For the first time, a near-infrared counterpart of the far-infrared source Seroens FIRS1 has been detected. The 2.2 µm source appears as a point like object at the apex of an extended knotty, jet-like nebulosity oriented towards the northwest. In addition, a group of 11 stellar objects is seen in the position of the IR/radio source SVS4. These objects are embedded in a very faint nebulosity and form one of the densest clustering of young stars found in dark clouds.

Ammonia and Near-Infrared Observations of Southern Dark Clouds

1993 ◽  
Vol 10 (3) ◽  
pp. 236-240 ◽  
Author(s):  
T.L. Bourke ◽  
A.R. Hyland ◽  
G. Robinson ◽  
S.D. James
Keyword(s):  
Near Infrared ◽  
Infrared Imaging ◽  
Imaging System ◽  
Ammonia Emission ◽  
Infrared Images ◽  
Infrared Source ◽  
Visual Appearance ◽  
Infrared Observations ◽  
Dark Clouds ◽  
Ammonia Source

AbstractThe Parkes radio telescope has been used to search a list of small, dense southern dark clouds and Bok globules for ammonia emission at 23.7 GHz. The ammonia observations, together with IRAS data and the cloud’s visual appearance, have been used to determine a short list of dark clouds for observation with the infrared imaging system (IRIS) on the Anglo-Australian Telescope, in an attempt to determine the dust density distribution within the clouds. Near-infrared images of a number of the short listed clouds have been obtained with IRIS at J, H and K’. Preliminary results are reported for this ammonia survey, together with IRIS images of the strong ammonia source DC 297.7–2.8. Coincident with the dense ammonia core of this object is an IRAS ‘core’ source, IRAS 11590–6452 and an extremely interesting near-infrared source, which lies on the edge of the error ellipse of the IRAS source.

Multiband far-infrared observations of the NGC 6334 complex

1986 ◽  
Vol 303 ◽  
pp. 629 ◽  
Author(s):  
L. Loughran ◽  
B. McBreen ◽  
G. G. Fazio ◽  
T. N. Rengarajan ◽  
C. W. Maxson ◽  
...  
Keyword(s):  
Far Infrared ◽  
Infrared Observations ◽  
Ngc 6334

scholarly journals Infrared Observations of the Galactic Nucleus

1980 ◽  
Vol 5 ◽  
pp. 163-169 ◽  
Author(s):  
J. H. Lacy
Keyword(s):  
Stellar Population ◽  
Near Infrared ◽  
Line Emission ◽  
Far Infrared ◽  
Infrared Emission ◽  
Ionized Gas ◽  
Infrared Observations ◽  
Cool Stars ◽  
Infrared Sources ◽  
Near Infrared Emission

AbstractInfrared observations of the galactic nucleus and conclusions regarding the nature of the objects present there are reviewed. Observations of three sources of infrared radiation are discussed: near-infrared emission from cool stars, mid- and far-infrared emission from dust, and line emission from ionized gas. These observations provide information about the mass distribution, the stellar population, and the origin and ionization of the compact mid-infrared sources. The possibility of the existence of a massive central black hole is discussed.

High-power, continuous-wave, single-frequency, all-periodically-poled, near-infrared source

2012 ◽  
Vol 37 (24) ◽  
pp. 5049 ◽  
Author(s):  
Kavita Devi ◽  
S. Chaitanya Kumar ◽  
M. Ebrahim-Zadeh
Keyword(s):  
High Power ◽  
Near Infrared ◽  
Continuous Wave ◽  
Single Frequency ◽  
Periodically Poled ◽  
Infrared Source

scholarly journals Comparison of satellite microwave backscattering (ASCAT) and visible/near-infrared reflectances (PARASOL) for the estimation of aeolian aerodynamic roughness length in arid and semi-arid regions

2012 ◽  
Vol 5 (2) ◽  
pp. 2933-2957
Author(s):  
C. Prigent ◽  
C. Jiménez ◽  
J. Catherinot
Keyword(s):  
Arid Regions ◽  
Near Infrared ◽  
Roughness Length ◽  
Aerodynamic Roughness Length ◽  
Sources Of Information ◽  
Transport Models ◽  
Dust Transport ◽  
Infrared Observations ◽  
Aerodynamic Roughness ◽  
Semi Arid

Abstract. Previous studies examined the possibility to estimate the aeolian aerodynamic roughness length from satellites, either from visible/near-infrared observations or from microwave backscattering measurements. Here we compare the potential of the two approaches and propose to merge the two sources of information to benefit from their complementary aspects, i.e. the high spatial resolution of the visible/near-infrared (PARASOL part of the A-Train) and the independence from atmospheric contamination of the active microwaves (ASCAT on board MetOp). A global map of the aeolian aerodynamic roughness length at 6 km resolution is derived, for arid and semi-arid regions. It shows very good consistency with the existing information on the properties of these surfaces. The dataset is available to the community, for use in atmospheric dust transport models.

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