Results 11 to 20 of about 451,529 (372)
, 2023 The dissertation presents result from study of Pre-main sequence (PMS) stars that are in the earliest stages of stellar evolution. These young stellar objects are still in the process of formation, and the energy they emit is produced only by ...
Semkov, Evgeni
core +2 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
THE HABITABLE ZONES OF PRE-MAIN-SEQUENCE STARS [PDF]
The Astrophysical Journal, 2014 We calculate the pre-main-sequence habitable zone (HZ) for stars of spectral classes F–M. The spatial distribution of liquid water and its change during the pre-main-sequence phase of protoplanetary systems is important for understanding how planets ...
R. Ramirez, L. Kaltenegger
semanticscholar +5 more sources
Pre-main sequence stars in the Lagoon Nebula (M8) [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 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 ...
Arias +35 more
core +10 more sources
The Effect of Pre-Main Sequence Stars on Star Cluster Dynamics [PDF]
Astrophys.J.637:838-849,2006, 2005 We investigate the effects of the addition of pre-main sequence evolution to star cluster simulations. We allowed stars to follow pre-main sequence tracks that begin at the deuterium burning birthline and end at the zero age main sequence. We compared our simulations to ones in which the stars began their lives at the zero age main sequence, and also ...
Alison Sills +2 more
arxiv +5 more sources
The coronal evolution of pre-main-sequence stars [PDF]
arXiv, 2016 The bulk of X-ray emission from pre-main-sequence (PMS) stars is coronal in origin. We demonstrate herein that stars on Henyey tracks in the Hertzsprung-Russell diagram have lower $\log(L_X/L_\ast)$, on average, than stars on Hayashi tracks. This effect is driven by the decay of $L_X$ once stars develop radiative cores. $L_X$ decays faster with age for
Gregory A. Feiden +3 more
arxiv +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
H2 and CO Emission from Disks around T Tauri and Herbig Ae Pre-Main-Sequence Stars and from Debris Disks around Young Stars: Warm and Cold Circumstellar Gas [PDF]
, 2001 We present ISO Short-Wavelength Spectrometer observations of H2 pure-rotational line emission from the disks around low- and intermediate-mass pre-main-sequence stars as well as from young stars thought to be surrounded by debris disks.
W. Thi +19 more
semanticscholar +3 more sources
Asteroseismology of pre-main sequence stars [PDF]
Communications in Asteroseismology, 2009 More than 30 years ago the first pulsating pre-main sequence (PMS) stars have been discov- ered. Since then, pulsations in 18 Herbig Ae stars and 18 members of young open clusters were detected and detailed asteroseismic investigations were conducted for some of them. We describe our latest results in this field.
K. Zwintz
openalex +6 more sources
The Pre-Main-Sequence Stars and Initial Mass Function of NGC 2264 [PDF]
, 2000 UBVRI and Hα CCD photometry has been performed in the southern region of NGC 2264 around the Cone Nebula. A nearly complete list of pre–main-sequence (PMS) members in the cluster has been made from the compilation of Hα emission stars identified in this ...
Byeong-Gon Park +3 more
semanticscholar +2 more sources