scholarly journals A MULTIWAVELENGTH STUDY OF YOUNG MASSIVE STAR-FORMING REGIONS. III. MID-INFRARED EMISSION

2009 ◽  
Vol 698 (1) ◽  
pp. 488-501 ◽  
Author(s):  
Esteban F. E. Morales ◽  
Diego Mardones ◽  
Guido Garay ◽  
Kate J. Brooks ◽  
Jaime E. Pineda
Keyword(s):  
Massive Star ◽  
Infrared Emission ◽  
Mid Infrared ◽  
Star Forming ◽  
Star Forming Regions

scholarly journals A (Sub)Millimeter survey of massive star-forming regions identified by the ISOPHOT Serendipity Survey (ISOSS)

2006 ◽  
Vol 2 (S237) ◽  
pp. 424-424
Author(s):  
Martin Hennemann ◽  
Stephan M. Birkmann ◽  
Oliver Krause ◽  
Dietrich Lemke
Keyword(s):  
Molecular Cloud ◽  
Massive Star ◽  
Infrared Emission ◽  
Evolutionary Stage ◽  
Star Forming ◽  
Star Forming Regions ◽  
Low Mass ◽  
Low Levels ◽  
Cloud Cores ◽  
Mass Case

AbstractA sample of potential massive starforming regions identified at 170 m by ISO was observed in the submillimeter and millimeter regime. These observations allow us to infer physical properties of the molecular cloud cores. Two sources are presented in detail: ISOSS J23053+5953 and J183640221 show viable candidates for massive protocluster cores. Our analysis shows very low temperatures and low levels of turbulence of the major mass fraction in the molecular cloud cores besides active star formation at an early evolutionary stage. These conditions seem similar to the low mass case and may precede phases of luminous infrared emission observed towards young massive protostars.

scholarly journals A QUALITY CHECK OF THE AKARI MID-INFRARED ALL-SKY DIFFUSE MAP TOWARD THE MASSIVE STAR-FORMING REGIONS NGC 6334 AND NGC 6357

2017 ◽  
Vol 32 (1) ◽  
pp. 21-23
Author(s):  
Hidetoshi Sano ◽  
Tomoya Amatsutsu ◽  
Toru Kondo ◽  
Keichiro Nakamichi ◽  
Mitsuyoshi Yamagishi ◽  
...  
Keyword(s):  
Massive Star ◽  
Mid Infrared ◽  
Star Forming ◽  
Star Forming Regions ◽  
Quality Check ◽  
Ngc 6334

Observations of Massive Star‐Forming Regions with Water Masers: Mid‐Infrared Imaging

2005 ◽  
Vol 156 (2) ◽  
pp. 179-215 ◽  
Author(s):  
J. M. De Buizer ◽  
J. T. Radomski ◽  
C. M. Telesco ◽  
R. K. Pina
Keyword(s):  
Massive Star ◽  
Infrared Imaging ◽  
Mid Infrared ◽  
Star Forming ◽  
Star Forming Regions ◽  
Water Masers

scholarly journals The Circumstellar Environment of Embedded Massive Stars

2002 ◽  
Vol 12 ◽  
pp. 143-145 ◽  
Author(s):  
Lee G. Mundy ◽  
Friedrich Wyrowski ◽  
Sarah Watt
Keyword(s):  
Massive Star ◽  
Massive Stars ◽  
Low Mass Stars ◽  
Submillimeter Wavelength ◽  
Star Forming ◽  
Star Forming Regions ◽  
Low Mass ◽  
Circumstellar Environments ◽  
Near Future

Millimeter and submillimeter wavelength images of massive star-forming regions are uncovering the natal material distribution and revealing the complexities of their circumstellar environments on size scales from parsecs to 100’s of AU. Progress in these areas has been slower than for low-mass stars because massive stars are more distant, and because they are gregarious siblings with different evolutionary stages that can co-exist even within a core. Nevertheless, observational goals for the near future include the characterization of an early evolutionary sequence for massive stars, determination if the accretion process and formation sequence for massive stars is similar to that of low-mass stars, and understanding of the role of triggering events in massive star formation.

scholarly journals Millimetre wavelength methanol masers survey towards massive star forming regions

2007 ◽  
Vol 3 (S242) ◽  
pp. 234-235
Author(s):  
T. Umemoto ◽  
N. Mochizuki ◽  
K. M. Shibata ◽  
D.-G. Roh ◽  
H.-S. Chung
Keyword(s):  
Detection Rate ◽  
Massive Star ◽  
Molecular Line ◽  
Maser Emission ◽  
Star Forming ◽  
Methanol Maser ◽  
Physical Conditions ◽  
Star Forming Regions ◽  
Methanol Masers ◽  
Maser Sources

AbstractWe present the results of a mm wavelength methanol maser survey towards massive star forming regions. We have carried out Class II methanol maser observations at 86.6 GHz, 86.9 GHz and 107.0 GHz, simultaneously, using the Nobeyama 45 m telescope. We selected 108 6.7 GHz methanol maser sources with declinations above −25 degrees and fluxes above 20 Jy. The detection limit of maser observations was ~3 Jy. Of the 93 sources surveyed so far, we detected methanol emission in 25 sources (27%) and “maser” emission in nine sources (10%), of which thre “maser” sources are new detections. The detection rate for maser emission is about half that of a survey of the southern sky (Caswell et al. 2000). There is a correlation between the maser flux of 107 GHz and 6.7 GHz/12 GHz emission, but no correlation with the “thermal” (non maser) emission. From results of other molecular line observations, we found that the sources with methanol emission show higher gas temperatures and twice the detection rate of SiO emission. This may suggest that dust evaporation and destruction by shock are responsible for the high abundance of methanol molecules, one of the required physical conditions for maser emission.

scholarly journals Infall and outflow motions towards a sample of massive star-forming regions from the RMS survey

2018 ◽  
Vol 477 (2) ◽  
pp. 2455-2469 ◽  
Author(s):  
N Cunningham ◽  
S L Lumsden ◽  
T J T Moore ◽  
L T Maud ◽  
I Mendigutía
Keyword(s):  
Massive Star ◽  
Star Forming ◽  
Star Forming Regions

scholarly journals Water in massive star-forming regions: HIFI observations of W3 IRS5

2010 ◽  
Vol 521 ◽  
pp. L37 ◽  
Author(s):  
L. Chavarría ◽  
F. Herpin ◽  
T. Jacq ◽  
J. Braine ◽  
S. Bontemps ◽  
...  
Keyword(s):  
Massive Star ◽  
Star Forming ◽  
Star Forming Regions

scholarly journals A Multiwavelength Study of Young Massive Star Forming Regions. II. The Dust Environment

2007 ◽  
Vol 666 (1) ◽  
pp. 309-320 ◽  
Author(s):  
Guido Garay ◽  
Diego Mardones ◽  
Kate J. Brooks ◽  
Liza Videla ◽  
Yanett Contreras
Keyword(s):  
Massive Star ◽  
Star Forming ◽  
Star Forming Regions

scholarly journals TRIGONOMETRIC PARALLAXES OF MASSIVE STAR-FORMING REGIONS. V. G23.01–0.41 AND G23.44–0.18

2009 ◽  
Vol 693 (1) ◽  
pp. 424-429 ◽  
Author(s):  
A. Brunthaler ◽  
M. J. Reid ◽  
K. M. Menten ◽  
X. W. Zheng ◽  
L. Moscadelli ◽  
...  
Keyword(s):  
Massive Star ◽  
Star Forming ◽  
Star Forming Regions ◽  
Trigonometric Parallaxes

scholarly journals The Youngest Star-Forming Regions in Galaxies: Giant Compact HII Regions and Protoglobular Clusters?

2001 ◽  
Vol 205 ◽  
pp. 224-227
Author(s):  
Jean L. Turner
Keyword(s):  
Dwarf Galaxy ◽  
Hii Regions ◽  
Starburst Galaxies ◽  
Mid Infrared ◽  
Infrared Observations ◽  
Star Forming ◽  
Bolometric Luminosity ◽  
Star Forming Regions ◽  
Young Clusters ◽  
Compact Hii Regions

Subarcsecond radio and infrared observations reveal a class of luminous, obscured, optically thick HII regions associated with extremely large young clusters in nearby starburst galaxies. VLA images show bright radio nebulae with ne ∼ 104 cm−3, densities characteristic of young Galactic compact HII regions. Excitation of the nebulae requires the presence of several thousand O stars within regions of 1-10 pc extent, corresponding to clusters containing 105–106 stars. The compact nebulae are also bright in the mid-infrared, and can for significant fractions of not only the total IR luminosity, but also the total bolometric luminosity, of the parent galaxies. The prototype for these “supernebulae” is the large, obscured cluster in the dwarf galaxy NGC 5253.

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