Results 1 to 10 of about 204,079 (82)

Tracing early stellar evolution with asteroseismology: pre-main sequence stars in NGC 2264 [PDF]

open access: yesEPJ 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

The potential of space observations for pulsating pre-main sequence stars [PDF]

open access: yesEPJ 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

Simulating the Sensitivity to Stellar Point Sources of Chandra X-Ray Observations

open access: yesThe 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

Photoevaporation and Close Encounters: How the Environment around Cygnus OB2 Affects the Evolution of Protoplanetary Disks

open access: yesThe 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

The Pre-main Sequence: Challenges and Prospects for Asteroseismology

open access: yesFrontiers in Astronomy and Space Sciences, 2022
Stars do not simply pop up on the main sequence. Before the stars arrive on the zero-age main sequence, they form in the collapses of molecular clouds, gain matter through accretion processes, and compress their cores until hydrogen can burn in full ...
Konstanze Zwintz, Thomas Steindl
doaj   +1 more source

The Chandra Cygnus OB2 Legacy Survey: Design and X-Ray Point-source Catalog

open access: yesThe Astrophysical Journal Supplement Series, 2023
The Cygnus OB2 association is the largest concentration of young and massive stars within 2 kpc of the Sun, including an estimated ∼65 O-type stars and hundreds of OB stars.
Nicholas J. Wright   +7 more
doaj   +1 more source

A Low-mass, Pre-main-sequence Eclipsing Binary in the 40 Myr Columba Association—Fundamental Stellar Parameters and Modeling the Effect of Star Spots

open access: yesThe Astronomical Journal, 2023
Young eclipsing binaries (EBs) are powerful probes of early stellar evolution. Current models are unable to simultaneously reproduce the measured and derived properties that are accessible for EB systems (e.g., mass, radius, temperature, and luminosity).
Benjamin M. Tofflemire   +14 more
doaj   +1 more source

A Population of Dipper Stars from the Transiting Exoplanet Survey Satellite Mission

open access: yesThe Astrophysical Journal Supplement Series, 2022
Dipper stars are a classification of young stellar objects that exhibit dimming variability in their light curves, dropping in brightness by 10%–50%, likely induced by occultations due to circumstellar disk material.
Benjamin K. Capistrant   +14 more
doaj   +1 more source

PRE-MAIN SEQUENCE EVOLUTIONS OF SOLAR ABUNDANCE LOW MASS STARS [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2007
We present the Pre-Main Sequence (PMS) evolutionary tracks of stars with 0.065~5.0M_⨀. The models were evolved from the PMS stellar birthline to the onset of hydrogen burning in the core.
Youn Kil Jung, Y. -C. Kim
doaj   +1 more source

The Pre--Main-Sequence of A-type stars [PDF]

open access: yes, 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   +2 more sources

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