Results 11 to 20 of about 11,325,029 (225)

Magnetospheric accretion on the T Tauri star BP Tauri [PDF]

Monthly Notices of the Royal Astronomical Society, 2008
From observations collected with the ESPaDOnS and NARVAL spectropolarimeters, we report the detection of Zeeman signatures on the classical T Tauri star BP Tau. Circular polarisation signatures in photospheric lines and in narrow emission lines tracing magnetospheric accretion are monitored throughout most of the rotation cycle of BP Tau at two ...
Donati, J.-F., Jardine, M. M., Gregory, S. G., Petit, P., Paletou, F., Bouvier, J., Dougados, C., Ménard, F., Cameron, A. C., Harries, T. J., Hussain, G. A. J., Unruh, Y., Morin, J., Marsden, S. C., Manset, N., Aurière, M., Catala, C., Alecian, E.   +17 more
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Is T Tauri North a “Classical” T Tauri Star? [PDF]

The Astrophysical Journal, 2020
Abstract We present high-resolution H- and K-band spectroscopic observations of the archetypal T Tauri star T Tau North. Synthetic spectral modeling is used to derive the K-band temperature, surface gravity, magnetic field strength, and rotational velocity for this star. The K-band spectroscopic temperature measured is
C. Flores, B. Reipurth, M. S. Connelley
openaire   +2 more sources

Spectropolarimetry of the Classical T Tauri Star T Tauri [PDF]

The Astronomical Journal, 2006
High-resolution (R ≈ 60,000) circular spectropolarimetry of the classical T Tauri star T Tau is presented. The star was observed on 1997 November 21 and 22. Analyzing 12 photospheric absorption lines, the mean longitudinal magnetic field is found to be Bz = 12 ± 35 G. The 3 σ upper limit of |Bz| ≤ 105 G.
Antoun G. Daou, Christopher M. Johns-Krull, Jeff A. Valenti   +2 more
openaire   +1 more source

Flares in T Tauri stars [PDF]

International Astronomical Union Colloquium, 1990
This review concerns rapid variability, on time-scales of a few hours or less, occurring on T Tauri stars (TTS). There are several recent reviews on observed properties of TTS (e.g. Appenzeller & Mundt 1989, Bertout 1989, Gahm 1990a, Kuhi & Cram 1989), some with more emphasis on “flare-like” activity (Feigelson et al.
openaire   +2 more sources

Evolutionary status of T Tauri stars [PDF]

Research in Astronomy and Astrophysics, 2018
Abstract The problem of determining the masses and ages of T Tauri star (TTS) using their evolutionary status is discussed. We test four pre-main sequence evolutionary models using well determined observational parameters of 12 binary TTSs and two binary red dwarfs.
Eretnova, Olga V., Dudorov, Alexander E.
openaire   +2 more sources

The Mysterious Dimmings of the T Tauri Star V1334 Tau [PDF]

, 2017
We present the discovery of two extended ˜0.12 mag dimming events of the weak-lined T Tauri star V1334. The start of the first event was missed but came to an end in late 2003, and the second began in 2009 February, and continues as of 2016 November ...
West, Richard G., Johnson, John A., Krzysztof Z. Stanek, Perry Berlind, Latham, David W., Holoien, Thomas W.-S., Wittenmyer, Robert A., Gilbert A. Esquerdo, Beatty, Thomas G., Megan Ansdell, Robert J. Siverd, Eastman, Jason, Prieto, Jose L., Thomas G. Beatty, Robert A. Wittenmyer, David James, Stevens, Daniel J., Keivan G. Stassun, Eric Gaidos, David W. Latham, Richard G. West, Jason Eastman, Rudolf B. Kuhn, Cargile, Phillip A., Thomas W.-S. Holoien, John A. Johnson, Calkins, Michael L., Stanek, Krzysztof Z., Anthony Sergi, Hugh P. Osborn, Kochanek, Christopher S., James, David, Joshua Pepper, Siverd, Robert J., Joseph E. Rodriguez, Reed, Phillip A., Lund, Michael B., Zhou, George, Allyson Bieryla, Howard M. Relles, Michael L. Calkins, Johnson, Samson A., Jason T. Wright, Benjamin J. Shappee, Michael B. Lund, Gaudi, B. Scott, Phillip A. Cargile, Phillip A. Reed, McCrady, Nate, Andrew Vanderburg, Esquerdo, Gilbert A., Osborn, Hugh P., Wright, Jason T., B. Scott Gaudi, Don Pollacco, Jonathan Horner, Berlind, Perry, Daniel J. Stevens, Shappee, Benjamin J., Gaidos, Eric, Christopher S. Kochanek, Samson A. Johnson, Kuhn, Rudolph B., Stassun, Keivan G., Bieryla, Allyson, Jose L. Prieto, Pollaco, Don, Ansdell, Megan, Pepper, Joshua, Vanderburg, Andrew, Rodriguez, Joseph E., George Zhou, Nate McCrady, Sergi, Anthony, Relles, Howard M., Horner, Jonathan   +75 more
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The variability of T Tauri stars [PDF]

Symposium - International Astronomical Union, 1990
For many years we have monitored the variability of some bright T Tauri stars with the 0.6 m “Perkin telescope” at Van Vleck Observatory. Collaborators in this endeavor have included several astronomers at the Crimea Astrophysical Observatory, at Capidomonte Observatory, at the U.S. Naval Observatory, and even some sophisticated amateurs.
openaire   +1 more source

Circular polarization in T Tauri stars [PDF]

The Astrophysical Journal, 1986
We report the detection of circular polarization in three T Tauri stars with known intrinsic linear polarization. A circumstellar origin is required.
P. Bastien, R. Nadeau
openaire   +1 more source

Periodic variations in the colours of the classical T Tauri star RW Aur A [PDF]

, 2001
The classical T Tauri star RW Aur
I. Tuominen, P. P. Petrov, J. Pelt
core   +1 more source

Magnetospheric accretion on the fully-convective classical T Tauri star DN Tau [PDF]

, 2013
The MaPP project is supported by the funding agencies of CFHT and TBL (through the allocation of telescope time) and by INSU/CNRS in particular, as well as by the French ‘Agence Nationale pour la Recherche’ (ANR).
Menard, F, G. Hussain, M. M. Romanova, Gregory, S. G.; id_orcid, Dougados, C., S. H. P. Alencar, Ménard, F., Gregory, S. G., Hussain, G., C. Dougados, The Mapp, Donati, J. -F., Alencar, S. H. P., Romanova, M. M., Alencar, SHP, J. Bouvier, Bouvier, J, Gregory, Scott, Dougados, C, Bouvier, J., Jardine, Moira Mary, Hussain, G. A. J., Jardine, M. M., M. M. Jardine, Romanova, MM, Donati, JF, S. G. Gregory, J. -f. Donati, Jardine, Moira Mary; id_orcid   +28 more
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