Results 81 to 90 of about 14,196,004 (190)
Age-related observations of low mass pre-main and young main sequence stars [PDF]
, 2009 This overview summarizes the age dating methods available for young sub-solar mass stars. Pre-main sequence age diagnostics include the Hertzsprung-Russell (HR) diagram, spectroscopic surface gravity indicators, and lithium depletion; asteroseismology is
Hillenbrand, Lynne A.
core
Disk-locking Regulates Stellar Rotation in Young Clusters: Insights from NGC 2264
The Astrophysical JournalMany young clusters possess extended main sequences, a phenomenon commonly ascribed to stellar rotation. However, the mechanism behind their very wide stellar rotation distributions remains unclear.
Yutian Bu +3 more
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Ultraviolet Accretion Continua Reveal a Transition in T Tauri Magnetic Topology
The Astrophysical Journal LettersMagnetic fields regulate accretion in T Tauri stars (TTSs) and evolve as radiative cores emerge during pre-main-sequence contraction. Stars above ∼0.35–0.5 M _⊙ transition from fully convective to partially convective interiors, a change associated with ...
Ana I. Gómez de Castro
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Modeling the origin of the rotation of massive stars
Astronomy & AstrophysicsContext. We explore the origins behind the rotation rates of massive stars, accounting for the fact that in contrast to their low-mass siblings, most massive stars do not have detectable magnetic fields.
Oliva André +5 more
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The Astrophysical JournalOn 2023 March 6, the Gaia telescope alerted a 2 mag burst from Gaia23bab, a young stellar object in the Galactic plane. We observed Gaia23bab with the Large Binocular Telescope obtaining optical and near-infrared spectra close in time to the peak of the ...
T. Giannini +13 more
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The Astrophysical JournalWe analyzed optical/near-IR Large Binocular Telescope spectra of 16 sources alerted by Gaia between 2021 and 2024 due to significant photometric variability.
Teresa Giannini +15 more
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Photometric determination of the mass accretion rates of pre-main-sequence stars
Astronomy & AstrophysicsWe studied the properties of star formation and the characteristics of young stars in a quiet region located beyond the outskirts of the prominent star-forming cluster NGC 346 in the Small Magellanic Cloud (SMC).
Dik C., De Marchi G.
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Pre-Main-Sequence evolution of rotating low-mass stars
, 1989 The evolutionary behaviour of rotating low-mass stars in the mass range 0.2 and 0.9M ⊙ has been investigated during the pre-Main-Sequence phase. The angular momentum is conserved locally in radiative regions and totally in convective regions, according ...
KIZILOGLU, N, Kızıloğlu, Nilgün
core +1 more source
Pre-main sequence stars in open clusters
, 2007 Context.We present the basic ideas and first results from the project we are carrying out at present, the search for and characterisation of pre-main sequence (PMS) stars among the members of Galactic young clusters.
A. J. Delgado, E. J. Alfaro, J. L. Yun
core +1 more source
Haro 5-2: A New Pre-main-sequence Quadruple Stellar System
The Astronomical JournalWe have discovered that the H α emission-line star Haro 5-2, located in the 3–6 Myr old Ori OB1b association, is a young quadruple system. The system has a 2+2 configuration, with an outer separation of 2.″6 and with resolved subarcsecond inner binary ...
Bo Reipurth +11 more
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