Results 181 to 190 of about 7,097 (207)

Coronal Holes. [PDF]

Living Rev Sol Phys, 2009
Cranmer SR.
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Comparative genomics uncovers novel structural and functional features of the heterotrimeric GTPase signaling system. [PDF]

Gene, 2011
Anantharaman V, Abhiman S, de Souza RF, Aravind L.   +3 more
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Accretion Disk Boundary Layers in Classical T Tauri Stars

The Astrophysical Journal, 1996
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Magnetize accretion and spin evolution in classical T Tauri stars

The Astrophysical Journal, 1995
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Classical T Tauri Stars and Substellar Analogs

Astrophysics and Space Science, 2004
We propose a spectroscopic criterion based on Hα equivalent width and spectral type to classify classical T Tauri stars and substellar analogs. We argue that accreting objects can be identified from low-resolution optical spectroscopy, when their Hα flux is stronger than the saturation limit at Log {Lum(Hα)/Lum(bol)} = −3.3.
D. Barrado Y Navascués, E. L. Martín, R. Jayawardhana, S. Mohanty   +3 more
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Magnetic Star-Disk Interaction in Classical T Tauri Stars

Astrophysics and Space Science, 2004
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Küker, M., Henning, Th., Rüdiger, G.
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HARPS spectropolarimetry of classical T Tauri stars

AIP Conference Proceedings, 2012
We present high spectral resolution Stokes V polarimetery of the Classical T Tauri stars (CTTSs) GQ Lup and TW Hya obtained with the polarimetric upgrade to the HARPS spectrometer on the ESO 3.6 m telescope. We present data on both photospheric lines and emission lines, concentrating our discussion on the polarization properties of the He I emission ...
C. M. Johns-Krull, J. A. Valenti, S. V. Jeffers, N. E. Piskunov, O. Kochukhov, C. Keller, F. Snik, M. Rodenhuis, V. Makaganiuk, H. Stempels   +9 more
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Spectropolarimetry of Magnetospheric Accretion on the Classical T Tauri Star BP Tauri

The Astrophysical Journal, 1999
High-resolution (R ≈ 60,000) circular spectropolarimetry of the classical T Tauri star BP Tauri is presented. No net polarization is detected in photospheric absorption lines, placing strong limits (3 σ) on the mean longitudinal magnetic field (±200 G) that is present over the surface of the star.
Christopher M. Johns-Krull, Jeff A. Valenti, Artie P. Hatzes, Antonio Kanaan   +3 more
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Magnetic star-disk interaction in classical T Tauri systems

Astrophysics and Space Science, 2003
M. KÜKER, TH. HENNING, G. RÜDIGER
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