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Related papers: Photometric variability of massive young stellar o…

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We present high angular resolution Submillimeter Array (SMA) and Combined Array for Research in Millimeter-wave Astronomy (CARMA) observations of two GLIMPSE Extended Green Objects (EGOs)--massive young stellar object (MYSO) outflow…

Solar and Stellar Astrophysics · Physics 2015-03-30 C. J. Cyganowski , C. L. Brogan , T. R. Hunter , E. Churchwell , Q. Zhang

We found that at least 18 Young Stellar Object candidates invisible at optical and near-infrared wavelengths, as well as ^12CO emission. They are IRAS point sources with FIR colors similar to those of usual YSOs, and the infrared spectral…

Astrophysics · Physics 2015-06-24 Ikuru Iwata , Shin-ichiro Okumura , Mamoru Saito

Given the high incidence of binaries among mature field massive stars, it is clear that multiplicity is an inevitable outcome of high-mass star formation. Understanding how massive multiples form requires the study of the birth environments…

Solar and Stellar Astrophysics · Physics 2024-01-24 E. Bordier , W. -J. de Wit , A. J. Frost , H. Sana , T. Pauwels , E. Koumpia

The stellar evolution theory of massive stars remains uncalibrated with high-precision photometric observational data mainly due to a small number of luminous stars that are monitored from space. Automated all-sky surveys have revealed…

Solar and Stellar Astrophysics · Physics 2017-02-08 Jaan Laur , Indrek Kolka , Tõnis Eenmäe , Taavi Tuvikene , Laurits Leedjärv

We have made 12CO 2-1 and 1-0 maps of eleven molecular outflows associated with intermediate to high-mass young stellar objects (YSOs) in order to establish whether the correlations between outflow parameters and source bolometric…

Astrophysics · Physics 2009-11-07 Naomi A. Ridge , Toby J. T. Moore

We have performed a WISE (Wide-Field Infrared Survey Explorer) based study to identify and characterize young stellar objects (YSOs) in 12x12 degree Perseus OB2 association. Spectral energy distribution (SED) slope in range of 3.4-12 micron…

Solar and Stellar Astrophysics · Physics 2015-09-16 Mohaddesseh Azimlu , J. Rafael Martinez-Galarza , August A. Muench

We have carried out near-infrared polarimetry toward the boundary of the Central Molecular Zone, in the field of (-1.4 deg $\lesssim l \lesssim$ -0.3 deg and 1.0 deg $\lesssim l \lesssim$ 2.9 deg, $|b|\lesssim$ 0.1 deg), using the…

Astrophysics of Galaxies · Physics 2015-06-19 Tatsuhito Yoshikawa , Shogo Nishiyama , Motohide Tamura , Jungmi Kwon , Tetsuya Nagata

Episodic accretion-driven outbursts are an extreme manifestation of accretion variability. It has been proposed that the development of gravitational instabilities in the proto-circumstellar medium of massive young stellar objects (MYSOs)…

Solar and Stellar Astrophysics · Physics 2018-12-12 Meyer D. M. -A. , Vorobyov E. I. , Elbakyan V. G. , Stecklum B. , Eislöffel J. , Sobolev A. M.

The properties of accretion disks around stars and brown dwarfs in the SOri cluster (age 3 Myr) are studied based on NIR time series photometry supported by MIR spectral energy distributions. We monitor ~30 young low-mass sources over 8…

Solar and Stellar Astrophysics · Physics 2015-05-13 Alexander Scholz , Xiaoying Xu , Ray Jayawardhana , Kenneth Wood , Jochen Eisloeffel , Ciara Quinn

The emission from young stellar objects (YSOs) in the mid-IR is dominated by the inner rim of their circumstellar disks. We present an IR-monitoring survey of about 800 objects in the direction of the Lynds 1688 (L1688) star forming region…

By matching infrared-selected, massive young stellar objects (MYSOs) and compact HII regions in the RMS survey to massive clumps found in the submillimetre ATLASGAL survey, we have identified ~1000 embedded young massive stars between…

Using the infrared photometry data extracted from the 2MASS, IRAS and MSX databases, 50 suspected young stellar objects (YSOs) are selected from about 37500 infrared objects in the 3x3 deg area with the center at Galactic longitude 142.5…

Astrophysics · Physics 2009-06-25 V. Straizys , V. Laugalys

We have used deep V-band and JHKs-band observations to investigate variability and stellar populations near the Galactic plane in Centaurus, and compared the observations with the Galactic model of Besancon. By applying image subtraction…

Astrophysics of Galaxies · Physics 2016-10-12 P. Pietrukowicz , D. Minniti , J. Alonso-Garcia , M. Hempel

We present initial results and source lists of variable sources in the Large Magellanic Cloud (LMC) for which we detect thermal infrared variability from the SAGE (Surveying the Agents of a Galaxy's Evolution) survey, which had 2 epochs of…

We have determined the rate of large accretion events in class I and II young stellar objects (YSOs) by comparing the all-sky digitised photographic plate surveys provided by SuperCOSMOS with the latest data release from Gaia (DR2). The…

Solar and Stellar Astrophysics · Physics 2019-04-24 C. Contreras Peña , T. Naylor , S. Morrell

We develop a new method to identify YSOs from star-forming regions using the photometry data from Spitzer's c2d Legacy Project. The aim is to obtain YSO lists as complete as possible for studying the statistical properties, such as Star…

Astrophysics of Galaxies · Physics 2015-06-12 Tien-Hao Hsieh , Shih-Ping Lai

We used Herschel Hi-GAL survey data to determine whether massive young stellar objects (MYSOs) are resolved at 70$\mu$m and to study their envelope density distribution. Our analysis of three relatively isolated sources in the l=30{\deg}…

Astrophysics of Galaxies · Physics 2015-06-24 F. A. Olguin , M. G. Hoare , H. E. Wheelwright , S. J. Clay , W. -J. de Wit , I. Rafiq , S. Pezzuto , S. Molinari

We present a grid of radiation transfer models of axisymmetric young stellar objects (YSOs), covering a wide range of stellar masses (from 0.1Msun to 50Msun) and evolutionary stages (from the early envelope infall stage to the late…

The variability of young stellar objects (YSO) changes their brightness and color preventing a proper classification in traditional color-color and color magnitude diagrams. We have explored the feasibility of the flux variation gradient…

Solar and Stellar Astrophysics · Physics 2015-06-17 F. Pozo Nuñez , M. Haas , R. Chini , M. Ramolla , K. -W. Hodapp

Observations of young stellar objects (YSOs) in centimeter bands can probe the continuum emission from growing dust grains, ionized winds, and magnetospheric activity, which are intimately connected to the evolution of protoplanetary disks…