Results 121 to 130 of about 45,569 (296)

Star Spot Induced Radial Velocity Variability in LkCa 19

, 2007
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., Christopher M. Johns‐Krull, D. T. Jaffe, Joncour I., L. Prato, Marcos Huerta, Marcy G. W., Patrick Hartigan, Petrov P. P., Strassmeier K. G.   +9 more
core   +1 more source

Unveiling extremely veiled T Tauri stars [PDF]

, 2008
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, Bouvier, Bouvier, Briceño, Calvet, Chelli, Code, Cram, F. M. Walter, G. F. Gahm, G. J. Herczeg, Gahm, Gameiro, Giovannelli, Grankin, H. C. Stempels, Hartigan, Hartigan, Herczeg, Hessamn, Kuhi, P. P. Petrov, Petrov, Petrov, Petrov, Pojmanski, Stahl, Stempels, Stempels, Valenti   +29 more
core   +2 more sources

Circadian regulation of key physiological processes by the RITMO1 clock protein in the marine diatom Phaeodactylum tricornutum

New Phytologist, Volume 246, Issue 4, Page 1724-1739, May 2025.
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, Raphaël Monteil, Soizic Cheminant Navarro, Dany Croteau, Lucie Charreton, Antoine Hoguin, Nils Fabian Strumpen, Denis Jallet, Fayza Daboussi, Peter G. Kroth, François‐Yves Bouget, Marianne Jaubert, Benjamin Bailleul, Jean‐Pierre Bouly, Angela Falciatore   +14 more
wiley   +1 more source

Correlating Changes in Spot Filling Factors with Stellar Rotation: The Case of LkCa 4

The Astrophysical Journal, 2023
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, Jeffrey S. Bary, Michael S. Petersen, Kimberly Ward-Duong, Benjamin M. Tofflemire, Katherine B. Follette, Heidi Mach   +6 more
doaj   +1 more source

Thermidor: The Revolution Betrayed in Trotsky, Orwell and Serge

Critical Quarterly, EarlyView.
Anna Vaninskaya
wiley   +1 more source

The Self‐Magnification of British Leaders: Prime Ministers’ Perceptions and Projections of their Powers and Roles in the Postwar Era

The Political Quarterly, Volume 96, Issue 2, Page 340-355, April/June 2025.
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

, 2009
(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, A. Sicilia-Aguilar, Adams, Apai, Artymowicz, Bouwman, Bouwman, Brandeker, Broeg, C. Chen, Carmona, Carpenter, Chauvin, Crovisier, D. Apai, Damjanov, Dorschner, Dullemond, Flaherty, Furlan, G. Meeus, Gail, Gail, Gustafsson, Haisch, Hearty, Henning, Higdon, Hogerheijde, Houck, I. Pascucci, Itoh, J. Bouwman, Jayawardhana, Jayawardhana, Jensen, Jäger, Keller, Kemper, Kessler-Silacci, Kessler-Silacci, Kurucz, Luhman, Luhman, Luhman, Magnani, Makovitz, Malfait, Min, Min, Muench, Mutschke, Pascucci, Petr, Pound, Ratzka, Rieke, Scholz, Scott, Servoin, Sicilia-Aguilar, Sicilia-Aguilar, Sicilia-Aguilar, Sicilia-Aguilar, Swain, Th. Henning, van Boekel, W. Lawson, Werner, White, Zimmermann   +70 more
core   +1 more source

Exploring Brown Dwarf Disks [PDF]

, 2001
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, Allard, Baraffe, Basri, Beckwith, Chiang, Chiang, Comerón, Comerón, Henning, Kenyon, L. Testi, Leggett, Lucas, Muzerolle, Natta, Natta, Neuhäuser, Oasa, Persi, Pickett, Reipurth, Waelkens, Zapatero Osorio   +23 more
core   +2 more sources

Indigenous Relational Practices as a Strategy to Transform Acute Hospital Settings: A Kaupapa Māori Grounded Theory Study

Nursing Inquiry, Volume 32, Issue 2, April 2025.
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, Merryn Gott, Terryann C. Clark, Julia Slark   +3 more
wiley   +1 more source

A Multiwavelength, Multiepoch Monitoring Campaign of Accretion Variability in T Tauri Stars from the ODYSSEUS Survey. III. Optical Spectra

The Astrophysical Journal
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, Catherine C. Espaillat, Thanawuth Thanathibodee, Connor E. Robinson, Caeley V. Pittman, Nuria Calvet, James Muzerolle, Fredrick M. Walter, Jochen Eislöffel, Eleonora Fiorellino, Carlo F. Manara, Ágnes Kóspál, Péter Ábrahám, Rik Claes, Elisabetta Rigliaco, Laura Venuti, Justyn Campbell-White, Pauline McGinnis, Manuele Gangi, Karina Mauco, Filipe Gameiro, Antonio Frasca, Zhen Guo   +22 more
doaj   +1 more source