Results 31 to 40 of about 14,196,004 (190)
Limits on the magnetic flux of a pre-main sequence star [PDF]
International Astronomical Union Colloquium, 1991 AbstractWe attempt to detect a magnetic field on the weak T Tauri star, TAP35, via the enhanced equivalent widths of Zeeman-broadened absorption lines. We synthesize 25 Fe I lines, having a range of Zeeman sensitivities, using an LTE Stokes line-transfer calculation.
G. Basri, G.W. Marcy
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GalaxiesWe report new medium-resolution spectroscopy covering the wavelength range from 0.6 to 2.4 μm, as well as multi-epoch, multi-wavelength photometry, of the Class I high-mass embedded young stellar object Mol 12 (IRAS 05373+2349). It is embedded (AV≃12) in
Mauricio Tapia +3 more
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Tracing early stellar evolution with asteroseismology: pre-main sequence stars in NGC 2264
EPJ Web of Conferences, 2015 Asteroseismology has been proven to be a successful tool to unravel details of the internal structure for different types of stars in various stages of their main sequence and post-main sequence evolution.
Zwintz Konstanze +4 more
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Massive pre-main-sequence stars in M17 [PDF]
, 2023 Context. The young massive-star-forming region M17 contains optically visible massive pre-main-sequence stars that are surrounded by circumstellar disks. Such disks are expected to disappear when these stars enter the main sequence.
Kamp, I. +19 more
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IRAC Observations of Taurus Pre–Main‐Sequence Stars [PDF]
The Astrophysical Journal, 2005 We present infrared photometry obtained with the IRAC camera on the Spitzer Space Telescope of a sample of 82 pre-main sequence stars and brown dwarfs in the Taurus star-forming region. We find a clear separation in some IRAC color-color diagrams between objects with and without disks. A few ``transition'' objects are noted, which correspond to systems
Hartmann, Lee +7 more
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ABYSS. IV. Identifying Signatures of Stellar Youth in APOGEE Spectra
The Astronomical JournalWe develop a convolutional neural network classifier that performs spectroscopic identification of stellar youth (
Valentina Bonilla Villalobos +12 more
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Open Astronomy, 2010 Using photometric data of infrared surveys, young stellar object (YSO) status is verified for 141 objects selected in our previous papers in the Cassiopeia and Camelopardalis segment of the Milky Way bounded by Galactic coordinates (l, b) = (132-158 ...
Straižys V., Kazlauskas A.
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Asteroseismology of pre-main sequence stars [PDF]
Communications in Asteroseismology, 2009 Intermediate-mass pre-main sequence (PMS) stars cross the instability region on their way to the main sequence and can become pulsationally unstable. The δ Scuti-like PMS pulsators populate the same area in the Hertzsprung-Russell (HR) diagram as the classical δ Scuti stars.
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Pre-main-sequence stars in the Lagoon Nebula (M8) [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 Abstract We report the discovery of new pre-main-sequence (PMS) stars in the Lagoon Nebula (M8) at a distance of 1.25 kpc, based on intermediate-resolution spectra obtained with the Boller & Chivens spectrograph at the 6.5-m Magellan I Telescope (Las Campanas Observatory, Chile).
Arias, Julia Inés +2 more
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Stellar chromospheric activity in main-sequence stars [PDF]
The research presented here presents a narrow slice of several largescale, ground-based astronomy surveys focused on chromospheric activity measurements of stars from the Keck Observatory.
Isaacson, Howard
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