Results 121 to 130 of about 45,569 (296)
Star Spot Induced Radial Velocity Variability in LkCa 19
We describe a new radial velocity survey of T Tauri stars and present the first results. Our search is motivated by an interest in detecting massive young planets, as well as investigating the origin of the brown dwarf desert.
Bouvier J.+9 more
core +1 more source
Unveiling extremely veiled T Tauri stars [PDF]
Photospheric absorption lines in classical T Tauri stars (CTTS) are weak compared to normal stars. This so-called veiling is normally identified with an excess continuous emission formed in shock-heated gas at the stellar surface below the accretion ...
Basri+29 more
core +2 more sources
Summary Phasing biological and physiological processes to periodic light–dark cycles is crucial for the life of most organisms. Marine diatoms, as many phytoplanktonic species, exhibit biological rhythms, yet their molecular timekeepers remain largely uncharacterized.
Alessandro Manzotti+14 more
wiley +1 more source
Correlating Changes in Spot Filling Factors with Stellar Rotation: The Case of LkCa 4
We present a multi-epoch spectroscopic study of LkCa 4, a heavily spotted non-accreting T Tauri star. Using SpeX at NASA’s Infrared Telescope Facility (IRTF), 12 spectra were collected over five consecutive nights, spanning ≈1.5 stellar rotations.
Facundo Pérez Paolino+6 more
doaj +1 more source
Thermidor: The Revolution Betrayed in Trotsky, Orwell and Serge
Critical Quarterly, EarlyView.
Anna Vaninskaya
wiley +1 more source
Abstract Within the extensive literature on the powers and constraints of British prime ministers, there has been little comparison of the extent to which the premiers themselves have perceived or projected a personal entitlement to determine government policy.
Archie Brown, Nicholas James
wiley +1 more source
MBM 12: young protoplanetary discs at high galactic latitude
(abridged) We present Spitzer infrared observations to constrain disc and dust evolution in young T Tauri stars in MBM 12, a star-forming cloud at high latitude with an age of 2 Myr and a distance of 275 pc.
A. Juhász+70 more
core +1 more source
Exploring Brown Dwarf Disks [PDF]
We discuss the spectral energy distribution of three very low mass objects in Chamaeleon I for which ground-based spectroscopy and photometry as well as ISO measurements in the mid-infrared are available (Comeron et al. 2000; Persi et al. 2000).
A. Natta+23 more
core +2 more sources
ABSTRACT Relational practice is the basis for human connection and is linked to enhanced healthcare experiences and involvement with healthcare services. Although the nurse‐patient relationship is typically built around behavioural communication skills, relational practice requires developing awareness, connectedness and responsiveness to others.
Bobbie‐Jo Pene+3 more
wiley +1 more source
Classical T Tauri Stars (CTTSs) are highly variable stars that possess gas- and dust-rich disks from which planets form. Much of their variability is driven by mass accretion from the surrounding disk, a process that is still not entirely understood.
John Wendeborn+22 more
doaj +1 more source