Results 11 to 20 of about 80,201 (344)

Unveiling the circumstellar environment towards a massive young stellar object [PDF]

, 2013
As a continuation of a previous work, in which we found strong evidence of massive molecular outflows towards a massive star forming site, we present a new study of this region based on very high angular resolution observations with the aim of ...
Fariña, C., Ortega, M. E., Paron, S.
core   +3 more sources

Luminosity Outburst of a High-mass Young Stellar Object Triggered by the Surrounding Radiation Field

The Astrophysical Journal Letters, 2023
We present observations of the 6.7 GHz methanol and 4.8 GHz formaldehyde masers toward the high-mass young stellar object G24.33+0.14 (hereafter G24). Our observations were conducted from 2019 to 2021 using the Shanghai Tianma 65 m Radio Telescope and ...
Jun-Ting Liu, Xi Chen, Xiao-Dian Chen, Zhi-Wei Chen, Shi-Min Song, You-Xin Wang, Yan-Kun Zhang, Zhang Zhao, Bin Li, Bo Xia, Zhi-Qiang Shen   +10 more
doaj   +1 more source

Young stellar objects close to Sgr A* [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractWe aim at modeling small groups of young stars such as IRS 13N, 0.1 pc away from Sgr A*, which is suggested to contain a few embedded massive young stellar objects. We perform hydrodynamical simulations to follow the evolution of molecular clumps orbiting around a 4 × 106 M⊙ black hole, to constrain the formation and the physical conditions of ...
B. Jalali, F. I. Pelupessy, A. Eckart, S. Portegies Zwart, N. Sabha, A. Borkar, J. Moultaka, K. Mužić, L. Moser   +8 more
openaire   +2 more sources

Cyanopolyyne Chemistry around Massive Young Stellar Objects [PDF]

The Astrophysical Journal, 2019
Abstract Recent radio astronomical observations have revealed that HC5N, the second shortest cyanopolyyne (HC2n+1N), is abundant around some massive young stellar objects (MYSOs), which is not predicted by classical carbon-chain chemistry.
Kotomi Taniguchi, Eric Herbst, Paola Caselli, Alec Paulive, Dominique M. Maffucci, Masao Saito   +5 more
openaire   +3 more sources

IRAS22150+6190: A POORLY STUDIED YOUNG STAR

Odessa Astronomical Publications, 2016
Many young stellar objects have been discovered in the course of the InfraRed Astronomical Satellite (IRAS) mission, which observed almost the entire sky in four photometric bands between 12 and 100 microns in 1989.
K. S. Kuratov, O. V. Zakhozhay, A. S. Miroshnichenko, V. A. Zakhozhay   +3 more
doaj   +1 more source

Infrared Interferometric Observations of Young Stellar Objects [PDF]

The Astrophysical Journal, 2000
We present infrared observations of four young stellar objects using the Palomar Testbed Interferometer (PTI). For three of the sources, T Tau, MWC 147 and SU Aur, the 2.2 micron emission is resolved at PTI's nominal fringe spacing of 4 milliarcsec (mas), while the emission region of AB Aur is over-resolved on this scale.
Akeson, R. L., Ciardi, D. R., van Belle, G. T., Creech-Eakman, M. J., Lada, E. A.   +4 more
openaire   +2 more sources

The GRAVITY young stellar object survey

Astronomy & Astrophysics, 2019
Contexto. Los estudios de la distribución del polvo, la composición y la evolución de los discos protoplanetarios proporcionan pistas para comprender la formación de planetas. Sin embargo, se sabe poco sobre las regiones más internas de los discos donde se espera que se formen los planetas telúricos. Objetivos.
Y.-I. Bouarour, K. Perraut, F. Ménard, W. Brandner, A. Caratti o Garatti, P. Caselli, E. van Dishoeck, C. Dougados, R. Garcia Lopez, R. Grellmann, Thomas Henning, L. Klarmann, Lucas Labadie, A. Natta, J. Sánchez-Bermúdez, W. F. Thi, P. T. de Zeeuw, A. Amorim, M. Bauböck, M. Benisty, J.‐P. Berger, Y. Clénet, V. Coudé du Foresto, G. Duvert, A. Eckart, F. Eisenhauer, F. Eupen, M. Filho, F. Gao, Paulo J. V. Garcia, É. Gendron, R. Genzel, S. Gillessen, A. Jiménez-Rosales, L. Jocou, S. Hippler, M. Horrobin, Z. Hubert, P. Kervella, S. Lacour, J.-B. Le Bouquin, Pierre Léna, T. Ott, T. Paumard, G. Perrin, O. Pfuhl, G. Rousset, S. Scheithauer, J. Shangguan, Julia Stadler, O. Straub, C. Straubmeier, E. Sturm, F. Vincent, S. D. von Fellenberg, F. Widmann, Michael Wiest   +56 more
openaire   +1 more source

Measuring the ionisation fraction in a jet from a massive protostar

Nature Communications, 2019
The ionisation fraction of protostellar jets is key to establish their true energetics. Here, the authors determine it in a jet from a high-mass young stellar object, using multi-wavelengths observations, confirming that the ionising mechanism giving ...
R. Fedriani, A. Caratti o Garatti, S. J. D. Purser, A. Sanna, J. C. Tan, R. Garcia-Lopez, T. P. Ray, D. Coffey, B. Stecklum, M. Hoare   +9 more
doaj   +1 more source

The circumstellar environment of the YSO TMR-1 and a revisit to the candidate very low-mass object TMR-1C [PDF]

, 2010
TMR-1 (IRAS~04361+2547) is a class~I proto-stellar source located in the nearby Taurus star-forming region. Its circumstellar environment is characterized by extended dust emission with complex structures and conspicuous filaments.
Allard, Bally, Baraffe, Brandner, Burrows, Chabrier, Cuby, Cuby, Davis, Eislöffel, Eislöffel, Furlan, Gueth, Hartmann, Hauschildt, Hogerheijde, Itoh, J.-G. Cuby, Kenyon, Li, Lin, Lucas, Lucas, Luhman, M. D. Smith, M. F. Sterzik, M. G. Petr-Gotzens, Motte, Natta, Ohashi, O’Connell, Padoan, Pickles, Prato, Robitaille, Sandell, Scholz, Shen, Shull, Smith, Smith, Smith, Stamatellos, Terebey, Terebey, Terebey, Torres, Whitney, Wilking   +48 more
core   +10 more sources

Photometric variability of massive young stellar objects [PDF]

Astronomy & Astrophysics, 2018
The Vista Variables in the Via Lactea (VVV) survey has allowed for an unprecedented number of multi-epoch observations of the southern Galactic plane. In a recent paper, 13 massive young stellar objects (MYSOs) have already been identified within the highly variable (ΔKs > 1 mag) YSO sample of another published work.
Teixeira, G. D. C., Kumar, M. S. N., Smith, L., Lucas, P. W., Morris, C., Borissova, J., Monteiro, M. J. P. F. G., Caratti o Garatti, A., Contreras Peña, C., Froebrich, D., Gameiro, J. F.   +10 more
openaire   +3 more sources