Results 91 to 100 of about 14,826 (213)

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   +2 more sources

Interaction between Winds from Weak-lined T Tauri Stars with Exoplanetary Magnetospheres

The Astrophysical Journal
T Tauri stars, in more advanced stages of evolution, during the final accretion phase of stellar formation, exhibit intense stellar winds and surface magnetic fields with intensities around a kilogauss.
Yasmmin F. Tamburus, Natália F. S. Andrade, Guilherme R. C. Sampaio, Vera Jatenco-Pereira   +3 more
doaj   +1 more source

Accretion Disks Around Young Objects. II. Tests of Well-Mixed Models with Ism Dust [PDF]

, 1999
We construct detailed vertical structure models of irradiated accretion disks around T Tauri stars with interstellar medium dust uniformly mixed with gas. The dependence of the structure and emission properties on mass accretion rate, viscosity parameter,
Calvet N., Friedjung M., Jorge Canto, Kawazoe E., Lee Hartmann, Leinert Ch., Lynden-Bell D., Nakano T., Nuria Calvet, Osterloh M., Paola D’Alessio, Shakura N. I., Susana Lizano, Wood K.   +13 more
core   +2 more sources

Molecular bases of circadian magnesium rhythms across eukaryotes

FEBS Letters, Volume 600, Issue 6, Page 894-909, March 2026.
Circadian rhythms in intracellular [Mg2+] exist across eukaryotic kingdoms. Central roles for Mg2+ in metabolism suggest that Mg2+ rhythms could regulate daily cellular energy and metabolism. In this Perspective paper, we propose that ancestral prokaryotic transport proteins could be responsible for mediating Mg2+ rhythms and posit a feedback model ...
Helen K. Feord, Gerben van Ooijen
wiley   +1 more source

Rotational Velocities and Radii Estimates of Low-mass Pre-main-sequence Stars in NGC 2264

The Astrophysical Journal
Investigating the angular momentum evolution of pre-main-sequence (PMS) stars provides important insight into the interactions between Sun-like stars and their protoplanetary disks, and the timescales that govern disk dissipation and planet formation. We
Laurin M. Gray, Katherine L. Rhode, Catrina M. Hamilton-Drager, Tiffany Picard, Luisa M. Rebull   +4 more
doaj   +1 more source

Large‐scale reproductive loss in sheep due to Border disease virus infection, New South Wales, Australia

Australian Veterinary Journal, Volume 104, Issue 3, Page 137-149, March 2026.
Border disease viruses (BDV) and bovine viral diarrhoea viruses (BVDV) are members of the Pestivirus genus in the family Flaviviridae. While BVDV is one of the most significant endemic viral infections of cattle in Australia, BDV infection is generally considered to be uncommon in Australian sheep.
K Parrish, ZB Spiers, MS Hazelton, KH Walker, E Duggan, W Graham, DS Finlaison, PD Kirkland   +7 more
wiley   +1 more source

Variability of the transitional T Tauri star T Chamaeleontis [PDF]

Astronomy & Astrophysics, 2009
We characterize the physical properties of T Chamaeleontis, a transitional T Tauri star showing UX Ori-type variability, and of its associated disc, and probe possible effects of disc clearing processes. Different spectral diagnostics are examined, based on a rich collection of optical high- and low-resolution spectra. We determine radial and projected
Schisano, E., Covino, E., Alcala', J. M., Esposito, M., Gandolfi, D., Guenther, E. W.   +5 more
openaire   +2 more sources

Fast transition between Classical and Weak lined T Tauri stars due to external UV dissipation

, 2007
The discovery of optical jets immersed in the strong UV radiation field of the Rosette Nebula sheds new light on, but meanwhile poses challenges to, the study of externally irradiated jets. The jet systems in the Rosette are found to have a high state of
Andrews, Bally, Bally, Bally, Dorland, Henney, J.Z. Li, Li, Li, Li, Looney, Massey, Panagia, Park, Reipurth, T.A. Rector, Whitworth, Zapatero Osorio   +17 more
core   +2 more sources

Modeling T Tauri Winds from He I 10830 Profiles [PDF]

, 2006
The high opacity of He I 10830 makes it an exceptionally sensitive probe of the inner wind geometry of accreting T Tauri stars. In this line blueshifted absorption below the continuum results from simple scattering of stellar photons, a situation which ...
Blandford R. D., Dougados C., John Kwan, Kurosawa R., Lavalley-Fouquet C., Suzan Edwards, William Fischer   +6 more
core   +3 more sources

A Practical Approach to Study Uncultivated Protists Using Single‐Cell Techniques for Electron Microscopy

Journal of Eukaryotic Microbiology, Volume 73, Issue 2, March/April 2026.
ABSTRACT Protists represent a significant portion of eukaryotic diversity with a wide range of ecological roles, lifestyles, and diverse morphological traits. Despite their widespread importance in ecological systems and their potential as model organisms, most protist lineages remain poorly characterized, in part due to their small size and the fact ...
Maia V. Palka, Kevin C. Wakeman, Eunji Park, Gordon Lax, Brian S. Leander   +4 more
wiley   +1 more source