Results 51 to 60 of about 172,294 (371)

Clustering Properties of Intermediate and High-mass Young Stellar Objects

The Astronomical Journal, 2023
We have selected 337 intermediate- and high-mass young stellar objects (YSOs; 1.5–20 M _⊙ ) well-characterized with spectroscopy. By means of the clustering algorithm HDBSCAN, we study their clustering and association properties in the Gaia DR3 catalog ...
Miguel Vioque, Manuel Cavieres, Michelangelo Pantaleoni González, Álvaro Ribas, René D. Oudmaijer, Ignacio Mendigutía, Lena Kilian, Héctor Cánovas, Michael A. Kuhn   +8 more
doaj   +1 more source

APEX-CHAMP^+ high-J CO observations of low-mass young stellar objects. IV. Mechanical and radiative feedback [PDF]

, 2015
Context. During the embedded stage of star formation, bipolar molecular outflows and UV radiation from the protostar are important feedback processes.
U. Yıldız, L. Kristensen, E. Dishoeck, M. Hogerheijde, A. Karska, A. Belloche, A. Endo, W. Frieswijk, R. Gusten, T. V. Kempen, S. Leurini, Z. Nagy, J. P'erez-Beaupuits, C. Risacher, N. Marel, R. Weeren, F. Wyrowski   +16 more
semanticscholar   +1 more source

The GRAVITY young stellar object survey

Astronomy & Astrophysics, 2021
Context. 51 Oph is a Herbig Ae/Be star that exhibits strong near-infrared CO ro-vibrational emission at 2.3 μ m, most likely originating in the innermost regions of a circumstellar disc. Aims. We aim to obtain the physical and geometrical properties of the system by spatially resolving the circumstellar environment of the inner gaseous disc.
Koutoulaki, M., Garcia Lopez, R., Natta, A., Fedriani, R., Caratti O Garatti, A., Ray, T., Coffey, D., Brandner, W., Dougados, C., Garcia, P., Klarmann, L., Labadie, L., Perraut, K., Sanchez-Bermudez, J., Lin, C.-C., Amorim, A., Bauböck, M., Benisty, M., Berger, J., Buron, A., Caselli, P., Clénet, Y., Coudé Du Foresto, V., de Zeeuw, P., Duvert, G., de Wit, W., Eckart, A., Eisenhauer, F., Filho, M., Gao, F., Gendron, E., Genzel, R., Gillessen, S., Grellmann, R., Habibi, M., Haubois, X., Haussmann, F., Henning, T., Hippler, S., Hubert, Z., Horrobin, M., Jimenez Rosales, A., Jocou, L., Kervella, P., Kolb, J., Lacour, S., Le Bouquin, J.-B., Léna, P., Linz, H., Ott, T., Paumard, T., Perrin, G., Pfuhl, O., Ramírez-Tannus, M., Rau, C., Rousset, G., Scheithauer, S., Shangguan, J., Stadler, J., Straub, O., Straubmeier, C., Sturm, E., van Dishoeck, E., Vincent, F., von Fellenberg, S., Widmann, F., Wieprecht, E., Wiest, M., Wiezorrek, E., Yazici, S., Zins, G.   +70 more
openaire   +3 more sources

Interferometric science results on young stellar objects

, 2009
Long-baseline interferometry at infrared wavelengths allows the innermost regions around young stars to be observed. These observations directly probe the location of the dust and gas in the disks.
Acke, Akeson, Akeson, Akeson, Akeson, Akeson, Berthoud, Boden, Boden, Casse, Colavita, Dullemond, Eisner, Eisner, Eisner, Eisner, Eisner, Eisner, Eisner, F. Malbet, Hartmann, Isella, Isella, Kraus, Kraus, Kraus, Lachaume, Lachaume, Leinert, Li Causi, Malbet, Malbet, Malbet, Millan-Gabet, Millan-Gabet, Millan-Gabet, Millan-Gabet, Monnier, Monnier, Monnier, Muzerolle, Natta, Preibisch, Quanz, Ratzka, Schegerer, Shu, Tannirkulam, Tannirkulam, Tatulli, Thi, Tuthill, van Boekel, Vinković, Vinković, Wilkin, Zhu, Ábrahám   +57 more
core   +1 more source

Disks around massive young stellar objects: are they common? [PDF]

, 2008
We present K-band polarimetric images of several massive young stellar objects at resolutions $\sim$ 0.1-0.5 arcsec. The polarization vectors around these sources are nearly centro-symmetric, indicating they are dominating the illumination of each field.
Itoh Y., Ji Yang, Kahn F. D., Melvin G. Hoare, Miki Ishii, Min Fang, Minchin N. R., Motohide Tamura, Schertl D., Yao Y., Yongqiang Yao, Zhibo Jiang   +11 more
core   +1 more source

A Unified Model for Bipolar Outflows from Young Stars: Kinematic Signatures of Jets, Winds, and Their Magnetic Interplay with the Ambient Toroids

The Astrophysical Journal, 2023
Kinematic signatures of the jet, winds, multicavities, and episodic shells arising in the unified model of bipolar outflows developed in Shang et al.
Hsien Shang, Chun-Fan Liu, Ruben Krasnopolsky, Liang-Yao Wang   +3 more
doaj   +1 more source

HETEROGENEITY IN 12CO/13CO ABUNDANCE RATIOS TOWARD SOLAR-TYPE YOUNG STELLAR OBJECTS [PDF]

, 2015
This study reports an unusual heterogeneity in [12C16O]/[13C16O] abundance ratios of carbon monoxide observed in the gas phase toward seven ∼solar-mass young stellar objects (YSOs) and three dense foreground clouds in the nearby star-forming regions ...
Rachel L. Smith, K. Pontoppidan, E. Young, M. Morris   +3 more
semanticscholar   +1 more source

A WISE CENSUS OF YOUNG STELLAR OBJECTS IN CANIS MAJOR [PDF]

Proceedings of the International Astronomical Union, 2015
With the Wide-field Infrared Survey Explorer (WISE), we searched for young stellar objects (YSOs) in a 100 deg2 region centered on the lightly studied Canis Major star-forming region.
W. Fischer, D. Padgett, K. Stapelfeldt, M. Sewiło   +3 more
semanticscholar   +1 more source

Outflow collimation in young stellar objects [PDF]

Monthly Notices of the Royal Astronomical Society, 1997
In this paper we explore the effect of radiative losses on purely hydrodynamic jet collimation models applicable to Young Stellar Objects (YSOs). In our models aspherical bubbles form from the interaction of a central YSO wind with an aspherical circum-protostellar density distribution.
Mellema, Garrelt, Frank, Adam
openaire   +2 more sources

Accretion Signatures from Massive Young Stellar Objects

, 2004
High resolution (lambda / Delta-lambda = 50,000) K-band spectra of massive, embedded, young stellar objects are presented. The present sample consists of four massive young stars located in nascent clusters powering Galactic giant H II regions.
A. Damineli, C. L. Barbosa, Kessel O., Kraus M., P. S. Conti, Phillips C. J., R. D. Blum, Richling S., S. Ridgway, Smith L. F.   +9 more
core   +2 more sources