Results 61 to 70 of about 714,343 (195)

A Survey For Planetary-mass Brown Dwarfs in the Taurus and Perseus Star-forming Regions [PDF]

, 2017
We present the initial results from a survey for planetary-mass brown dwarfs in the Taurus star-forming region. We have identified brown dwarf candidates in Taurus using proper motions and photometry from several ground- and space-based facilities ...
T. Esplin, K. Luhman
semanticscholar   +1 more source

Signatures of inflow motion in cores of massive star formation: Potential collapse candidates

, 2007
Using the IRAM 30 m telescope, a mapping survey in optically thick and thin lines was performed towards 46 high mass star-forming regions. The sample includes UC H{\sc ii} precursors and UC H{\sc ii} regions.
Brand J., Christian Henkel, Hatchell J., Martin Miller, Molinari S., Rui Xue, Tieftrunk A. R., Xin Guan, Yuefang Wu   +8 more
core   +1 more source

3C236: Radio Source, Interrupted? [PDF]

, 2001
We present new HST STIS/MAMA near-UV images and archival WFPC2 V and R band images which reveal the presence of four star forming regions in an arc along the edge of the dust lane in the giant (4 Mpc) radio galaxy 3C236.
Alexander P., André R. Martel, Anton M. Koekemoer, Barthel P. D., Baum S. A., Christiansen W. A., Christopher P. O’Dea, Ferdinando D. Macchetto, Fomalont E. B., Fomalont E. B., George K. Miley, Kotanyi C., Lara L., Mack K.-H., Mark G. Allen, Merritt D., Parma P., Scalo J., Scheuer P. A. G., Scheuer P. A. G., Schoenmakers A. P., Stefi A. Baum, Tribble P. C., van der Laan H., Waldram E. M., William B. Sparks, Willis A. G.   +26 more
core   +3 more sources

On the origin of phosphorus nitride in star-forming regions [PDF]

, 2018
We present multi-transition observations of PN towards a sample of nine massive dense cores in different evolutionary stages. Using transitions with different excitation conditions, we have found for the first time that the excitation temperatures of PN ...
C. Mininni, F. Fontani, V. Rivilla, M. Beltr'an, Paola Caselli, A. Vasyunin, A. Vasyunin   +6 more
semanticscholar   +1 more source

Near-infrared circular polarization survey in star-forming regions : Correlations and trends [PDF]

, 2014
We have conducted a systematic near-infrared circular polarization (CP) survey in star-forming regions, covering high-mass, intermediate-mass, and low-mass young stellar objects.
Hough, J., Kandori, Ryo, Kusakabe, Nobuhiko, Kwon, Jungmi, Lucas, P.W., Nagata, Tetsuya, Nagayama, Takahiro, Nakajima, Yasushi, Tamura, Motohide   +8 more
core   +2 more sources

High- and Low-Mass Star Forming Regions from Hierarchical Gravitational Fragmentation. High local Star Formation Rates with Low Global Efficiencies

, 2009
We investigate the properties of "star forming regions" in a previously published numerical simulation of molecular cloud formation out of compressive motions in the warm neutral atomic interstellar medium, neglecting magnetic fields and stellar feedback.
A.-Katharina Jappsen, Ballesteros-Paredes, Ballesteros-Paredes, Ballesteros-Paredes, Ballesteros-Paredes, Beuther, Bigiel, Brunt, Burkert, Caselli, Elmegreen, Elmegreen, Elmegreen, Enrique Vázquez-Semadeni, Evans, Federrath, Federrath, Frisch, Galván-Madrid, Gilberto C. Gómez, Hartmann, Hartmann, Heitsch, Heitsch, Heitsch, Heitsch, Hennebelle, Heyer, Hillenbrand, Ikeda, Javier Ballesteros-Paredes, Jijina, Kirk, Klessen, Klessen, Klessen, Klessen, Klessen, Koyama, Krumholz, Krumholz, Krumholz, Kurtz, Larson, Lee, Li, Matzner, McKee, McKee, Ostriker, Palla, Ralf S. Klessen, Rosas-Guevara, Sandstrom, Tobin, Vázquez-Semadeni, Vázquez-Semadeni, Vázquez-Semadeni, Vázquez-Semadeni, Vázquez-Semadeni, Vázquez-Semadeni, Whitworth   +61 more
core   +1 more source

Chemical modelling of complex organic molecules with peptide-like bonds in star-forming regions [PDF]

, 2017
Peptide bonds (N-C=O) play a key role in metabolic processes since they link amino acids into peptide chains or proteins. Recently, several molecules containing peptide-like bonds have been detected across multiple environments in the interstellar medium
D. Qu'enard, I. Jim'enez-Serra, S. Viti, J. Holdship, A. Coutens   +4 more
semanticscholar   +1 more source

VLA and ATCA Search for Natal Star Clusters in Nearby Star-Forming Galaxies

, 2011
In order to investigate the relationship between the local environment and the properties of natal star clusters, we obtained radio observations of 25 star-forming galaxies within 20 Mpc using the Very Large Array (VLA) and the Australia Telescope ...
Aversa, Alan, Brogan, Crystal, Goss, W., Johnson, Kelsey, Pisano, D. J.   +4 more
core   +1 more source

Anomalously Low-metallicity Regions in MaNGA Star-forming Galaxies: Accretion Caught in Action? [PDF]

Astrophysical Journal, 2018
We use data from 1222 late-type star-forming galaxies in the SDSS IV Mapping Nearby Galaxies at Apache Point Observatory survey to identify regions in which the gas-phase metallicity is anomalously low compared to expectations from the tight empirical ...
H. Hwang, J. Barrera-Ballesteros, T. Heckman, K. Rowlands, Lihwai Lin, V. Rodriguez-Gomez, H. Pan, B. Hsieh, S. Sánchez, D. Bizyaev, J. Almeida, D. Thilker, J. Lotz, Amy M. Jones, P. Nair, B. Andrews, N. Drory   +16 more
semanticscholar   +1 more source

Chemical modelling of glycolaldehyde and ethylene glycol in star-forming regions [PDF]

, 2017
Glycolaldehyde (HOCH$_2$CHO) and ethylene glycol ((CH$_2$OH)$_2$) are two complex organic molecules detected in the hot cores and hot corinos of several star-forming regions.
A. Coutens, A. Coutens, S. Viti, J. Rawlings, M. Beltr'an, J. Holdship, I. Jímenez-Serra, D. Qu'enard, V. Rivilla   +8 more
semanticscholar   +1 more source