Results 21 to 30 of about 14,388,284 (282)

Rotation and Activity of Pre–Main‐Sequence Stars [PDF]

open access: yesThe Astrophysical Journal, 2007
40 pages, 8 figures, ApJ, in ...
Scholz, Alexander   +3 more
openaire   +2 more sources

THE HABITABLE ZONES OF PRE-MAIN-SEQUENCE STARS [PDF]

open access: yesThe Astrophysical Journal, 2014
We calculate the pre-main-sequence HZ for stars of spectral classes F to M. The spatial distribution of liquid water and its change during the pre-main-sequence phase of protoplanetary systems is important in understanding how planets become habitable.
Ramirez, Ramses M., Kaltenegger, Lisa
openaire   +2 more sources

The Instability Strip for Pre–main-sequence Stars [PDF]

open access: yesThe 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 solar masses.
Marconi, M., Palla, F.
openaire   +2 more sources

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

Nonradial Oscillations on a Pre–Main‐Sequence Star [PDF]

open access: yesThe Astrophysical Journal, 2007
We show that the modes observed on the pulsating pre-main-sequence (PMS) star NGC 6383 170 can be interpreted as a combination of radial and nonradial p-modes. Using a dense grid of PMS models and oscillation spectra, we have identified models that match the observed oscillation spectrum within 1 σ of the frequency uncertainties and are consistent with
Zwintz, Konstanze   +2 more
openaire   +2 more sources

Pre-Main-Sequence Lithium Depletion [PDF]

open access: yes, 2006
8 pages, invited review at "Chemical abundances and mixing in stars in the Milky Way and its satellites", eds. L. Pasquini, S. Randich. ESO Astrophysics Symposium (Springer-Verlag)
openaire   +2 more sources

MAGNETIC INTERACTIONS IN PRE-MAIN-SEQUENCE BINARIES [PDF]

open access: yesThe Astrophysical Journal, 2011
Young stars typically have strong magnetic fields, so that the magnetospheres of newly formed close binaries can interact, dissipate energy, and produce synchrotron radiation. The V773 Tau A binary system, a pair of T Tauri stars with a 51 day orbit, displays such a signature, with peak emission taking place near periastron.
Adams, Fred C.   +4 more
openaire   +3 more sources

The Enigmatic, Highly Variable, High-Mass Young Stellar Object Mol 12: A New Extreme Herbig Be (Proto)star

open access: yesGalaxies
We 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
doaj   +1 more source

Disks and Halos in Pre-Main-Sequence Stars [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2003
11 pages, 10 figures.
Vinković, Dejan   +3 more
openaire   +4 more sources

Massive pre-main-sequence stars in M17 [PDF]

open access: yesProceedings of the International Astronomical Union, 2016
We obtained VLT/X-shooter spectra of twelve candidate young massive stars previously selected by Hanson et al. (1997) in the giant Hii region M17. An analysis of their spectra using FASTWIND models (Puls et al. 2005) shows that they span a mass range of 6 - 20 M⊙.
Ramirez-Tannus, M.C.   +8 more
openaire   +6 more sources

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