Results 11 to 20 of about 14,196,004 (190)
, 2023 The dissertation presents result from study of Pre-main sequence (PMS) stars that are in the earliest stages of stellar evolution. These young stellar objects are still in the process of formation, and the energy they emit is produced only by ...
Semkov, Evgeni
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Seismology of pre-main-sequence stars in NGC 6530 [PDF]
The Astrophysical Journal, 2007 Publisher's version/PDFNonradial p-mode oscillation spectra, computed from a dense grid of pre-main-sequence models, are fit to observed oscillation spectra of several stars in the young cluster NGC 6530.
Kallinger, T. +4 more
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The coronal evolution of pre-main-sequence stars
The 19th Cambridge Workshop on Cool Stars, Stellar Systems, and the Sun (CS19), 2016 The bulk of X-ray emission from pre-main-sequence (PMS) stars is coronal in origin. We demonstrate herein that stars on Henyey tracks in the Hertzsprung-Russell diagram have lower log(LX/L*), on average, than stars on Hayashi tracks.
Gregory, Scott G.; id_orcid +3 more
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The Astrophysical JournalThe surface magnetic fields of pre-main-sequence stars and zero-age main-sequence stars are notably strong, resulting in the generation of numerous spots and the emission of bright chromospheric lines.
Mai Yamashita, Yoichi Itoh, Shin Toriumi
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Are pre-main-sequence stars older than we thought? [PDF]
, 2009 We fit the colour–magnitude diagrams of stars between the zero-age main-sequence and terminal-age main sequence in young clusters and associations. The ages we derive are a factor of 1.5–2 longer than the commonly used ages for these regions, which are ...
Tim Naylor (21824576)
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Gaia21bja: Pre-main-sequence Star with Quasiperiodic Bursts
The Astrophysical JournalGaia21bja is a Gaia alerted young stellar object (YSO) that exhibits at least seven quasiperiodic brightenings over a 20 yr long light curve with durations of 1.5–2 yr and amplitudes up to ∼1.7 mag in the Gaia G band.
Ádám Mátéfy +14 more
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Pre-main sequence stars in LH 91
Astronomy & Astrophysics, 2022 Aims. We study the accretion properties of pre-main sequence (PMS) low-mass stars in the LH 91 association within the Large Magellanic Clouds. Methods. Using optical multiband photometry obtained with the Hubble Space Telescope, we identify 75 candidates showing Hα excess emission above the 3σ level with equivalent width EWHα ⩾ 10 Å.
R. Carini +5 more
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The ages of pre-main-sequence stars [PDF]
Monthly Notices of the Royal Astronomical Society, 1999 The position of pre-main-sequence or protostars in the Hertzsprung--Russell diagram is often used to determine their mass and age by comparison with pre-main-sequence evolution tracks. On the assumption that the stellar models are accurate, we demonstrate that, if the metallicity is known, the mass obtained is a good estimate.
Tout, Christopher A. +2 more
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Pre-main-sequence isochrones - II. Revising star and planet formation time-scales [PDF]
, 2013 We have derived ages for 13 young (
SP Littlefair (7736309) +4 more
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Proper Motions of Pre-Main Sequence Stars [PDF]
, 2013 International audienceThe kinematic study of young stars is an important tool to discuss the early stages of star formation. In this context, proper motions allow us to detect moving group structures of young stars to which they belong.
Ducourant, C. +5 more
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