Results 71 to 80 of about 14,196,004 (190)
Spektra: Jurnal Fisika dan AplikasinyaMassive stars (over 8 solar masses) undergo intricate cosmic journeys. Their evolution, shaped by parameters like stellar wind, rotation velocity, and overshoot, generally includes the pre-main sequence, main sequence, and post-main sequence phases.
Alin Hafizhah Adira, Aprilia
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Pre-Main Sequence Stars Seen by ISO [PDF]
Space Science Reviews, 2005 Observations of pre-main sequence objects (T Tauri, Herbig Ae/Be and FU Orionis stars) obtained with the instrumentation on board the Infrared Space Observatory (ISO) are reviewed. All the observations have been mainly carried out by using the two spectrographs SWS and LWS, adopting their low resolution modes and such data have been used both for lines
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Radial differential rotation leading to dipole collapse in pre-main-sequence stars
Astronomy & AstrophysicsContext. Despite significant progress in the observational characterization of stellar magnetic fields, the physical processes that govern their intensity and topology, which could certainly result from their formation history, remain poorly understood ...
Guseva A. +3 more
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Dynamical masses of young stellar objects with the VLBA: DYNAMO-VLBA
Astronomy & AstrophysicsWe present results from a multi-epoch Very Long Baseline Array (VLBA) survey of compact radio sources in the Orion complex, conducted within both the DYNAMO–VLBA and GOBELINS projects.
Dzib Sergio A. +11 more
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Polarization: A Method to Reveal the True Nature of the Dusty S-Cluster Object (DSO/G2)
Galaxies, 2018 There have been different scenarios describing the nature of a dusty source, noted as Dusty S-cluster Object (DSO) or G2, orbiting around the Galactic centre super-massive black hole.
Banafsheh Shahzamanian +4 more
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Effect of Time-varying X-Ray Emission from Stellar Flares on the Ionization of Protoplanetary Disks
The Astrophysical JournalX-rays have significant impacts on cold, weakly ionized protoplanetary disks by increasing the ionization rate and driving chemical reactions. Stellar flares are explosions that emit intense X-rays and are the unique source of hard X-rays with an energy ...
Haruka Washinoue +2 more
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Galaxies, 2019 Stellar evolution theory is most uncertain for massive stars. For reliable predictions of the evolution of massive stars and their final fate, solid constraints on the physical parameters, and their changes along the evolution and in different ...
Michaela Kraus
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On the ages of pre-main-sequence stars in Taurus
The Astronomical Journal, 1992 A search for pre-main-sequence stars in a region of about 12.7 deg 2 near the L 1551 complex in the Taurus molecular cloud have been made. Only two new pre-main-sequence stars have been identified from optical spectra of 383 proper motion candidates on the basis of Li I 6707 A absorption.
M. Gomez +6 more
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Inactive Longitude and Superflare in the Active Single-lined Pre-main-sequence Binary V2279 Cyg
The Astrophysical JournalYoung, solar-like stars in the pre-main-sequence (PMS) stage exhibit vigorous magnetic activity that significantly influences their circumstellar environments and the processes of planetary formation and evolution.
Xueying Hu +9 more
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The growth of a lithium abundance dispersion in pre-main-sequence stars
Lithium is predicted, and observed, to be depleted in contracting low-mass pre-main-sequence (PMS) stars. Yet, these stars reach the zero-age main-sequence (ZAMS) with a spread in lithium abundance at a given effective temperature that is not predicted ...
Tognelli, E, Jeffries, R D, Jackson, R J
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