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Using young open clusters and O--B2-type stars in~\emph{Gaia}~DR3, we investigate the kinematics of the local spiral structure. In general, the young sources in the outer spiral arms may present larger peculiar motions than those in the…

Astrophysics of Galaxies · Physics 2023-08-25 Dejian Liu , Ye Xu , Chaojie Hao , Shuaibo Bian , Zehao Lin , Yingjie Li , Jingjing Li

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…

Using the LAMOST-Gaia common stars, we demonstrate that the in-plane velocity field for the nearby young stars are significantly different from that for the old ones. For the young stars, the probably perturbed velocities similar to the old…

Astrophysics of Galaxies · Physics 2017-01-30 Chao Liu , You-Gang Wang , Juntai Shen , Zhao-Yu Li , Yu-Jing Qin , Yonghui Hou , Yuefei Wang , Yong Zhang , Zihuang Cao , Yue Wu

It has often been suggested that supernova remnants (SNRs) can trigger star formation. To investigate the relationship between SNRs and star formation, we have examined the known sample of 45 SNRs in the Large Magellanic Cloud to search for…

Astrophysics of Galaxies · Physics 2015-05-19 K. M. Desai , Y. -H. Chu , R. A. Gruendl , W. Dluger , M. Katz , T. Wong , C. -H. R. Chen , L. W. Looney , A. Hughes , E. Muller , J. Ott , J. L. Pineda

Currently available data on the field of velocities Vr, Vl, Vb for open star clusters are used to perform a kinematic analysis of various samples that differ by heliocentric distance, age, and membership in individual structures (the Orion,…

Astrophysics · Physics 2008-11-26 V. V. Bobylev , A. T. Bajkova , S. V. Lebedeva

We investigated the evolutionary stages and disk properties of 211 Young stellar objects (YSOs) across the Perseus cloud by modeling the broadband optical to mid-infrared (IR) spectral energy distribution (SED). By exploring the…

Solar and Stellar Astrophysics · Physics 2015-07-17 Hong-Xin Zhang , Yu Gao , Min Fang , Hai-Bo Yuan , Yinghe Zhao , Ruixiang Chang , Xuejian Jiang , Xiao-Wei Liu , A-Li Luo , Hongjun Ma , Zhengyi Shao , Xiaolong Wang

In this paper, I present a new set of synthetic spectral energy distributions (SEDs) for young stellar objects (YSOs) spanning a wide range of evolutionary stages, from the youngest deeply embedded protostars to pre-main-sequence stars with…

Solar and Stellar Astrophysics · Physics 2017-03-29 Thomas P. Robitaille

We have obtained spectra and measured the stellar kinematics in a sample of 25 nearby early-type galaxies (with velocity dispersions from less than 100 km/s to over 300 km/s) using the near-infrared CO absorption bandhead at 2.29 microns.…

Astrophysics · Physics 2009-11-07 Julia D. Silge , Karl Gebhardt

We investigate the ionised gas morphology, excitation properties, and kinematics in 19 nearby star-forming galaxies from the PHANGS-MUSE survey. We directly compare the kinetic energy of expanding superbubbles and the turbulent motions in…

We consider two previously studied samples of OB stars with different distance scales. The first one consists of 98 massive spectroscopic binary stars with photometric distances, and the second one consists on 140 OB stars with the…

Astrophysics of Galaxies · Physics 2017-03-22 V. V. Bobylev , A. T. Bajkova

We present a catalog of 3354 candidate young stars within 500 pc that appear to have been ejected from their parent associations with relative speeds of >5 km/s. These candidates have been homogeneously selected through performing a 2d…

Solar and Stellar Astrophysics · Physics 2022-10-12 Marina Kounkel , Aidan McBride , Keivan G. Stassun , Nathan Leigh

We analyze the spatial distribution of dusty young stellar objects (YSOs) identified in the Spitzer Survey of the Orion Molecular clouds, augmenting these data with Chandra X-ray observations to correct for incompleteness in dense clustered…

We have conducted a kinematic study of 165 young M dwarfs with ages of <300 Myr. Our sample is composed of stars and brown dwarfs with spectral types ranging from K7 to L0, detected by ROSAT and with photometric distances of <25 pc assuming…

We compare APOGEE radial velocities (RVs) of young stars in the Orion A cloud with CO line gas emission and find a correlation between the two at large-scales, in agreement with previous studies. However, at smaller scales we find evidence…

Astrophysics of Galaxies · Physics 2016-04-27 A. Hacar , J. Alves , J. Forbrich , S. Meingast , K. Kubiak , J. Grossschedl

We report signatures of episodic accretion in young stellar objects (YSOs) that emerge in protobinary configurations in a gravoturbulent gas collapse. We find in most of these protobinary systems strong accretion bursts between the two…

Solar and Stellar Astrophysics · Physics 2021-09-08 Rafeel Riaz , Dominik R. G. Schleicher , Siegfried Vanaverbeke , Ralf S. Klessen

Context. Central compact objects (CCOs) are a peculiar class of neutron stars, primarily encountered close to the center of young supernova remnants (SNRs) and characterized by thermal X-ray emission. Aims. Our goal is to perform a…

High Energy Astrophysical Phenomena · Physics 2021-07-14 Martin G. F. Mayer , Werner Becker

We examine emission from a young protostellar object (YPO) with three-dimensional ideal MHD simulations and three-dimensional non-local thermodynamic equilibrium (non-LTE) line transfer calculations, and show the first results. To calculate…

Solar and Stellar Astrophysics · Physics 2015-05-13 M. Yamada , M. N. Machida , S. Inutsuka , K. Tomisaka

Aims: We want to study the physical properties of the ionized jet emission in the vicinity of an O-type young stellar object (YSO), and estimate how efficient is the transfer of energy and momentum from small- to large-scale outflows.…

Astrophysics of Galaxies · Physics 2016-12-07 A. Sanna , L. Moscadelli , R. Cesaroni , A. Caratti o Garatti , C. Goddi , C. Carrasco-González

Based on data for 102 OB3 stars with known proper motions and radial velocities, we have tested the distances derived by Megier et al. from interstellar Ca II spectral lines. The internal reconciliation of the distance scales using the…

Astrophysics of Galaxies · Physics 2011-06-30 Vadim Bobylev , Anisa Bajkova

Extensive surveys of star-forming regions with Spitzer have revealed populations of disk-bearing young stellar objects. These have provided crucial constraints, such as the timescale of dispersal of protoplanetary disks, obtained by…

Solar and Stellar Astrophysics · Physics 2018-07-04 C. F. Manara , T. Prusti , F. Comeron , R. Mor , J. M. Alcala , T. Antoja , S. Facchini , D. Fedele , A. Frasca , T. Jerabkova , G. Rosotti , L. Spezzi , L. Spina