Results 71 to 80 of about 46,048 (306)

The Magnetic Fields of Classical T Tauri Stars [PDF]

, 2007
We report new magnetic field measurements for 14 classical T Tauri stars (CTTSs). We combine these data with one previous field determination in order to compare our observed field strengths with the field strengths predicted by magnetospheric accretion ...
C. Johns–Krull
semanticscholar   +1 more source

A Two-Dimensional Near-Infrared Speckle Imaging Survey of T Tauri Stars in Taurus and Ophiuchus [PDF]

, 1992
We present the results of a magnitude limited (K≤8.5 mag) multiplicity survey of T Tauri stars in the two nearest star forming regions, Taurus-Auriga and Ophiuchus-Scorpius (D = 150 pc), observable from the northern hemisphere.
Ghez, A., Matthews, K., Neugebauer, G.
core   +1 more source

ON THE SPECTRAL AND PHOTOMETRIC ACTIVITY IN YOUNG STARS

Odessa Astronomical Publications, 2017
Results of long time homogenous medium resolution spectral observations of classic T Tauri type stars DI Cep, T Tau and GW Ori obtained during 1972-1990 are analyzed.
N. Z. Ismailov
doaj   +1 more source

A Magnetically Driven Disk Wind in the Inner Disk of PDS 70

The Astrophysical Journal, 2023
PDS 70 is so far the only young disk where multiple planets have been detected by direct imaging. The disk has a large cavity when seen at submillimeter and near-infrared wavelengths, which hosts two massive planets. This makes PDS 70 the ideal target to
Justyn Campbell-White, Carlo F. Manara, Myriam Benisty, Antonella Natta, Rik A. B. Claes, Antonio Frasca, Jaehan Bae, Stefano Facchini, Andrea Isella, Laura Pérez, Paola Pinilla, Aurora Sicilia-Aguilar, Richard Teague   +12 more
doaj   +1 more source

Sodium ionization in T-tauri stars [PDF]

International Astronomical Union Colloquium, 1989
We present the results of a study of the sodium ionization and excitation in the winds of low-luminosity, pre-main-sequence stars. Line profiles for the Nal doublet at 5990,5986 Åare discussed and compared with the observations for those T Tauri stars with P-Cygni profiles.
A. Natta, C. Giovanardi
openaire   +2 more sources

Dynamical Masses of T Tauri Stars and Calibration of Pre-Main-Sequence Evolution [PDF]

, 2000
We have used the high sensitivity and resolution of the IRAM interferometer to produce subarcsecond 12CO J = 2-1 images of nine protoplanetary disks surrounding T Tauri stars in the Taurus-Auriga cloud (seven singles and two binaries).
M. Simon, A. Dutrey, S. Guilloteau
semanticscholar   +1 more source

Nonradial and nonpolytropic astrophysical outflows IX. Modeling T Tauri jets with a low mass-accretion rate

, 2011
Context: A large sample of T Tauri stars exhibits optical jets, approximately half of which rotate slowly, only at ten per cent of their breakup velocity.
Agra-Amboage, Aibéo, Anderson, André, Bardeen, Beck, Bertout, Blandford, Bouvier, Bouvier, Bouvier, C. Sauty, Cabrit, Cabrit, Calvet, Casse, Choi, Cieza, Clarke, Contopoulos, Decampli, Donati, Dougados, Edwards, Edwards, Fendt, Ferreira, Ferreira, Ferro-Fontán, Garcia, Garcia, Ghosh, Ghosh, Gracia, Gómez de Castro, Gómez de Castro, Günther, Hartigan, Herbst, J. J. G. Lima, K. Tsinganos, Koide, Kopp, Krasnopolsky, Kundurthy, Kwan, Küker, Lavalley-Fouquet, Li, Lima, Marilli, Matsakos, Matsakos, Matt, Matt, Matt, Matt, Matt, Meliani, Mestel, Mestel, Mora, N. Globus, Ouyed, Petrov, Pudritz, Rebull, Rebull, Rebull, Romanova, Sauty, Sauty, Sauty, Sauty, Sauty, Schatzman, Schwartz, Shang, Shu, Spruit, St-Onge, Stassun, Stassun, Stute, Ustyugova, V. Cayatte, Vidotto, Vidotto, Vlahakis, Vlahakis, Walter, Weber, Z. Meliani, Zanni   +93 more
core   +2 more sources

Discovery of "isolated" comoving T Tauri stars in Cepheus [PDF]

, 2010
During the course of a large spectroscopic survey of X-ray active late-type stars in the solar neighbourhood, we discovered four lithium-rich stars packed within just a few degrees on the sky.
A. Frasca, A. Klutsch, Appenzeller, Cardelli, Chugainov, Chugainov, D. Montes, Dobashi, Droege, E. Marilli, Feigelson, Frasca, Frasca, Grenier, Guillout, Guillout, Hauschildt, Hillenbrand, Hubble, Høg, Kun, Kun, Kurosawa, López-Santiago, Magazzu, Makarov, Meyer, Mizuno, Monet, Montes, Montes, Moon, Muzerolle, Nations, Olano, P. Guillout, Siess, Sterzik, Sterzik, Tachihara, Tachihara, Zacharias, Zuckerman   +42 more
core   +3 more sources

Actvity on T Tauri Stars [PDF]

International Astronomical Union Colloquium, 1995
We have made a detailed investigation of the short-term variability of the classical T Tauri star BP Tauri in UBVRI. Data were collected from the Wendelstein Observatory in 1991, 1992 and 1993 with time resolutions down to 1 sec. The 0.8m telescope was equipped with a fiber-fed fifteen channel high-speed photometer (Barwig et al. 1987).
Gösia F. Gahm, Erik Gullbring, Peicheng Chen, Heinz Barwig   +3 more
openaire   +1 more source

SPECTROPOLARIMETRY OF THE CLASSICAL T TAURI STAR BP TAU [PDF]

The Astrophysical Journal, 2012
We implement a least-squares deconvolution (LSD) code to study magnetic fields on cool stars. We first apply our code to high resolution (R ≈ 60,000) optical echelle spectra of several solar-like stars as tests of the code and to measure the mean longitudinal magnetic field on the surface of these stars.
Chen, Wei, Johns-Krull, Christopher M.
openaire   +4 more sources