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The Ages of Pre-main-sequence Stars [PDF]
Monthly Notices of the Royal Astronomical Society, 1998 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.
Alexander +45 more
core +3 more sources
Tracing early stellar evolution with asteroseismology: pre-main sequence stars in NGC 2264 [PDF]
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
doaj +4 more sources
Massive pre-main sequence stars in M17 [PDF]
Proceedings of the International Astronomical Union, 2016 The formation process of massive stars is still poorly understood. Massive young stellar objects (mYSOs) are deeply embedded in their parental clouds, they are rare and thus typically distant, and their reddened spectra usually preclude the determination
Bik, Arjan +8 more
core +6 more sources
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
Giovanni Fazio +10 more
core +3 more sources
The Instability Strip for Pre--Main-Sequence Stars [PDF]
The Astrophysical Journal, 1998 We investigate the pulsational properties of Pre--Main-Sequence (PMS) stars by means of linear and nonlinear calculations. The equilibrium models were taken from models evolved from the protostellar birthline to the ZAMS for masses in the range 1 to 4 ...
Baade D. +9 more
core +5 more sources
The Pre--Main-Sequence of A-type stars [PDF]
Proceedings of the International Astronomical Union, 2004 Young A-type stars in the pre--main-sequence (PMS) evolutionary phase are particularly interesting objects since they cover the mass range (1.5-4 solar ma sses) which is most sensitive to the internal conditions inherited during the protostellar phase ...
Marconi, Marcella, Palla, Francesco
core +4 more sources
The potential of space observations for pulsating pre-main sequence stars [PDF]
EPJ Web of Conferences, 2017 The first asteroseismic studies of pre-main sequence (pre-MS) pulsators have been conducted based on data from the space telescopes MOST and CoRoT with typical time bases of less than 40 days.
Zwintz Konstanze
doaj +3 more sources
Rotation and activity of pre-main-sequence stars [PDF]
The Astrophysical Journal, 2007 We present a study of rotation (vsini) and chromospheric activity (Halpha EW) based on an extensive set of high-resolution optical spectra obtained with MIKE on the 6.5m Magellan Clay telescope.
Alexander Scholz +12 more
core +2 more sources
Simulating the Sensitivity to Stellar Point Sources of Chandra X-Ray Observations
The Astrophysical Journal Supplement Series, 2023 The Chandra Cygnus OB2 Legacy Survey is a wide and deep X-ray survey of the nearby and massive Cygnus OB2 association. The survey has detected ∼8000 X-ray sources, the majority of which are pre-main-sequence X-ray-emitting young stars in the association ...
Nicholas J. Wright +4 more
doaj +1 more source
The Astrophysical Journal Supplement Series, 2023 In our Galaxy, star formation occurs in a variety of environments, with a large fraction of stars formed in clusters hosting massive stars. OB stars have an important feedback on the evolution of protoplanetary disks orbiting around nearby young stars ...
M. G. Guarcello +12 more
doaj +1 more source