Results 1 to 10 of about 14,826 (213)

Dust Around T Tauri Stars [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2011
To reproduce the multiple broad peaks and the fine spectral features in the spectral energy distributions (SEDs) of T Tauri stars, we model dust around T Tauri stars using a radiative transfer model for multiple isothermal circumstellar dust shells. We
Kyung-Won Suh, Young-Joo Kwon
doaj   +3 more sources

Dust Disks Around Young Stellar Objects [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2016
To reproduce the spectral energy distributions (SEDs) of young stellar objects (YSOs), we perform radiative transfer model calculations for the circumstellar dust disks with various shapes and many dust species.
Kyung-Won Suh
doaj   +1 more source

Photometric and spectroscopic study of five pre-main sequence stars in the vicinity of NGC 7129 [PDF]

open access: yesSerbian Astronomical Journal, 2019
We present results from long-term optical photometric and spectroscopic observations of five pre-main sequence stars, located in the vicinity of the bright nebula NGC 7129.
Semkov E.H., Ibryamov S.I., Peneva S.P.
doaj   +1 more source

Machine-learning Morphological Classification of TESS Light Curves of T Tauri Stars

open access: yesThe Astronomical Journal, 2023
We present a variability and morphological classification study of TESS light curves for T Tauri star candidates in the Orion, IC 348, γ Velorum, Upper Scorpius, Corona Australis, and Perseus OB2 regions.
Astaroth Elizabethson   +4 more
doaj   +1 more source

Search for young stars among ROSAT All-Sky Survey X-ray sources in and around the R CrA dark cloud [PDF]

open access: yes, 2000
We present the ROSAT All-Sky Survey data in a 126 deg^2 area in and around the CrA star forming region. With low-resolution spectroscopy of unidentified ROSAT sources we could find 19 new pre-main sequence stars, two of which are classical T Tauri stars,
Alcala, Juan M.   +8 more
core   +2 more sources

Evidence for grain growth in T Tauri disks [PDF]

open access: yes, 2003
In this article we present the results from mid-infrared spectroscopy of a sample of 14 T Tauri stars with silicate emission. The qualitative analysis of the spectra reveals a correlation between the strength of the silicate feature and its shape similar
Leinert, Ch.   +5 more
core   +10 more sources

UVES spectra of young brown dwarfs in Cha I: radial and rotational velocities [PDF]

open access: yes, 2001
Based on high-resolution UVES spectra we found that the radial velocity (RV) dispersion of nine of twelve known young bona fide and candidate brown dwarfs in the Cha I dark cloud is 2.0 km/s, i.e.
Balthasar   +12 more
core   +2 more sources

Discovery of Two Different Full Disk Evolutionary Patterns of M-type T Tauri Stars with LAMOST DR8

open access: yesThe Astrophysical Journal, 2023
The full disk, full of gas and dust, determines the upper limit of planet masses, and its lifetime is critical for planet formation, especially for giant planets.
Hasitieer Haerken   +4 more
doaj   +1 more source

Surface magnetic fields on two accreting T Tauri stars: CV Cha and CR Cha [PDF]

open access: yes, 2009
We have produced brightness and magnetic field maps of the surfaces of CV Cha and CR Cha: two actively accreting G and K-type T Tauri stars in the Chamaeleon I star-forming cloud with ages of 3-5 Myr.
A. Collier Cameron   +74 more
core   +6 more sources

Outflows and particle acceleration in the accretion disks of young stars [PDF]

open access: yesEPJ Web of Conferences, 2019
Magneto-gas-dynamic (MGD) outflows from the accretion disks of T Tauri stars with fossil large-scale magnetic fileld are investigated. We consider two mechanisms of the outflows: rise of the magnetic flux tubes (MFT) formed in the regions of efficient ...
Khaibrakhmanov Sergey, Dudorov Alexander
doaj   +1 more source

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