Results 21 to 30 of about 1,150 (163)

Distances to Nearby Molecular Clouds Traced by Young Stars

open access: yesThe Astrophysical Journal Supplement Series, 2023
I present a catalog of distances to 63 molecular clouds located within ∼2.5 kpc of the Sun. The cloud distances are derived based on utilizing the Gaia DR3 parallaxes of the young stellar objects (YSOs). By identifying AllWISE YSO candidates (YSOCs) with
Miaomiao Zhang
doaj   +1 more source

Outflow collimation in young stellar objects [PDF]

open access: yesMonthly 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

Measurement of the Angular Momenta of Pre-main-sequence Stars: Early Evolution of Slow and Fast Rotators and Empirical Constraints on Spin-down Torque Mechanisms

open access: yesThe Astronomical Journal, 2023
We use TESS full-frame imaging data to investigate the angular momentum evolution of young stars in the Orion Complex. We confirm recent findings that stars with rotation periods faster than 2 days are overwhelmingly binaries, with typical separations of
Marina Kounkel   +5 more
doaj   +1 more source

New Sample of Young Stellar Objects [PDF]

open access: yesSymposium - International Astronomical Union, 1991
in recent years there has been much interest in the study of large samples of molecular cloud cores and related infrared sources in an attempt to observe true protostars - objects in transition between a molecular cloud core and a young stellar object (YSO).
S. M. Moy, G. H. Macdonald, R. J. Habing
openaire   +1 more source

Magnetic Fields Observed along the East–West Outflow of IRAS 16293-2422

open access: yesThe Astrophysical Journal
Magnetic fields likely play an important role in the formation of young protostars. Multiscale and multiwavelength dust polarization observations can reveal the inferred magnetic field from scales of the cloud to core to protostar.
Frankie J. Encalada   +8 more
doaj   +1 more source

Clustering Properties of Intermediate and High-mass Young Stellar Objects

open access: yesThe 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   +8 more
doaj   +1 more source

Young Stellar Objects and Herbig-Haro Objects [PDF]

open access: yesAustralian Journal of Physics, 1992
Our current understanding of Herbig-Haro objects and their relationship with young stellar outflows is reviewed. The role of multi-waveband observations in the visible, infrared and radio in the study of outflows is discussed with examples drawn from the HH1, HH24 and HH54 outflow complexes.
openaire   +1 more source

Embedded Young Stellar Objects near H72.97-69.39: A Forming Super Star Cluster in N79

open access: yesThe Astrophysical Journal
We present 102 embedded young stellar object (YSO) candidates associated with the H72.97-69.39 super star cluster (SSC) in the Large Magellanic Cloud (LMC).
Omnarayani Nayak   +12 more
doaj   +1 more source

Detection of a Deeply Embedded Protocluster Candidate in NGC 602 with JWST

open access: yesThe Astronomical Journal
JWST NIRCam and MIRI photometry of NGC 602, a low-metallicity young star cluster in the Small Magellanic Cloud, reveals an extended mid-infrared bright emission feature designated as MZS-1.
Beena Meena   +5 more
doaj   +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

open access: yesThe 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   +3 more
doaj   +1 more source

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