Results 31 to 40 of about 106 (103)
Variability of young stars: Determination of rotational periods of weak‐line T Tauri stars in the Cepheus‐Cassiopeia star‐forming region [PDF]
Astronomische Nachrichten, 2009 AbstractWe report on observation and determination of rotational periods of ten weak‐line T Tauri stars in the Cepheus‐Cassiopeia star‐forming region. Observations were carried out with the Cassegrain‐Teleskop‐Kamera (CTK) at University Observatory Jena between 2007 June and 2008 May.
Koeltzsch, A. +13 more
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Another look at the UBV variability of T Tauri stars
The Astrophysical Journal, 1995 The UBV variability of classical T Tauri stars is investigated using a large data set compiled by Herbst et al. (1994). The analysis is based on the covariance of the UBV colors, which is independent of the obscuration and the temporal sampling, and is a powerful tool for finding trends that otherwise would be hidden in the complex time-dependence of ...
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Magnetic Accretion and Photopolarimetric Variability in Classical T Tauri Stars
The Astrophysical Journal, 1999 25 pages, 8 figures To be published in ApJ, 1999 ...
Stassun, Keivan G., Wood, Kenneth
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Catalogue of UBVRI photometry of T Tauri stars and analysis of the causes of their variability
The Astronomical Journal, 1994 A computer-based catalogue of UBVRI photoelectric photometry of T Tauri stars and their earlier type analogs has been compiled. It presently includes over 10 000 entries on 80 stars and will be updated on a regular basis; it is available on Internet. The catalogue is used to analyze the sometimes bizarre light variations of pre-main-sequence stars on ...
W. Herbst +3 more
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STARSPOT-INDUCED OPTICAL AND INFRARED RADIAL VELOCITY VARIABILITY IN T TAURI STAR HUBBLE I 4 [PDF]
The Astrophysical Journal, 2011 Accepted for publication in The Astrophysical ...
Mahmud, Naved I. +6 more
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Investigating variable accretion in T Tauri stars using FUV spectroscopy with UVIT
, 2023 T Tauri stars (TTSs) are low-mass pre-main-sequence (PMS) stars, surrounded by protoplanetary disks. Accreting TTS are called Classical TTS (CTTS) and are characterized by strong line emission in UV (C IV, Si IV, He II) and optical (Hα). Non-accreting, disk-less weak-line TTS (WTTS) shows weak emission lines due to chromospheric activity and lack of H2
Nayak, Prasanta K. +10 more
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The Astronomical Journal, 1990 BP Tau is a moderate-strength T Tauri star, which has previously been studied photometrically by Vrba et al. (1986, 1989) and shown to have a 7.6-day light cycle. Here, BP Tau was reobserved in order to monitor this star with the IUE satellite. In conjunction with the UV spectroscopy, nearly simultaneous ground-based optical photometry was also ...
Theodore Simon +2 more
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Photometric Variability of T Tauri Stars: Stellar Madness or Not?
Classical T Tauri stars (cTTs) are low-mass accreting young stellar objects (i.e., class II objects with Mstar < 2Msun). They are characterized observationally as variable objects, with e.g., irregular light curves. This variability likely arises from their inner environments, where complex dynamical interactions occur between the stellar magnetosphere
Pantolmos, George +2 more
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Rotational Modulation and Long-term Variability of Magnetic Fields in T Tauri Stars with IGRINS
The Astrophysical JournalAbstract Magnetic fields play a central role in the evolution of pre-main-sequence (PMS) stars, yet direct observational constraints on their variability over rotational and multiyear timescales remain scarce. We investigate the temporal behavior of surface magnetic fields in a sample of nine PMS stars observed ...
Facundo Pérez Paolino +2 more
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The effect of variable stellar magnetic fields on the spin state of T Tauri stars
Astronomy & AstrophysicsUnderstanding the stellar spin evolution of young stars is crucial for understanding the evolution of protoplanetary disks and, consequently, the formation of exoplanets. According to stellar spin models, T Tauri stars should evolve toward a spin equilibrium in which the external spin-down torque balances both the external spin-up (
Lukas Gehrig, Daniel Steiner
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