Results 71 to 80 of about 7,097 (207)

The Ca ii Lines as Tracers of Disk Structure in T Tauri Stars: The Chamaeleon I Region

The Astrophysical Journal, 2023
We present a study of the Ca ii K and IR triplet lines in a sample of classical T Tauri stars in the Chamaeleon I star-forming region. We study X-shooter spectra of the stars in the sample and find that in some of these stars the Ca ii lines are much ...
Marbely Micolta, Nuria Calvet, Thanawuth Thanathibodee, Gladis Magris C., María José Colmenares, Jesús V. Díaz, Jairo Alzate-Trujillo   +6 more
doaj   +1 more source

ACROSS LANGUAGE BORDERS: WRITING INTEGRATION AND BELONGING IN KINDERTRANSPORT DIARIES

German Life and Letters, Volume 79, Issue 2, Page 129-147, April 2026.
ABSTRACT The diaries of six Kindertransport refugees who fled Nazi persecution in Germany and Austria to Britain in 1938 and 1939 offer unique insights into how language use reflects negotiations of identity and belonging. Moving beyond traditional concepts of bilingualism, a translingual framework reveals how these young refugees navigated between ...
Monja Stahlberger
wiley   +1 more source

Evidence for Dust Depletion in a Misaligned Protoplanetary Disk with JWST

The Astrophysical Journal Letters
Here we report the detection of dust depletion in a misaligned inner disk around UX Tau A using JWST MIRI spectra. Mid-infrared (MIR) continuum “seesaw” variability was detected in this disk by Spitzer and attributed to variable shadows cast on the outer
C. C. Espaillat, T. Thanathibodee, Z. Zhu, I. Rabago, J. Wendeborn, N. Calvet, L. Zamudio-Ruvalcaba, M. Volz, C. Pittman, M. McClure, J. F. Babb, R. Franco-Hernández, E. Macías, M. Reynolds, P.-G. Yan   +14 more
doaj   +1 more source

Young Stellar Objects, Accretion Disks, and Their Variability with Rubin Observatory LSST

The Astrophysical Journal Supplement Series, 2023
Vera C. Rubin Observatory, through the Legacy Survey of Space and Time (LSST), will allow us to derive a panchromatic view of variability in young stellar objects (YSOs) across all relevant timescales.
R. Bonito, L. Venuti, S. Ustamujic, P. Yoachim, R. A. Street, L. Prisinzano, P. Hartigan, M. G. Guarcello, K. G. Stassun, T. Giannini, E. D. Feigelson, A. Caratti o Garatti, S. Orlando, W. I. Clarkson, P. McGehee, E. C. Bellm, J. E. Gizis   +16 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

ABYSS. III. Observing Accretion Activity in Young Stars Through Empirical Veiling Measurements

The Astronomical Journal
Stellar accretion plays an important role in the early stages of stellar evolution, particularly in Classical T Tauri Stars (CTTSs). Accretion of a CTTS can be related to different physical parameters such as effective temperature ( T _eff ), age ...
Serat Saad, Marina Kounkel, Keivan G. Stassun, A. Roman-Lopes, C. Román-Zúñiga, Jinyoung Serena Kim, Jonathan C. Tan, R. López-Valdivia   +7 more
doaj   +1 more source

Pre-main sequence variable stars in young open cluster NGC 1893

, 2012
We present results of multi-epoch (fourteen nights during 2007-2010) $V$-band photometry of the cluster NGC 1893 region to identify photometric variable stars in the cluster. The study identified a total of 53 stars showing photometric variability.
A. K. Pandey, Appenzeller, Baraffe, Bessell, Bouvier, Bouvier, Breger, Carpenter, Chauhan, Chauhan, Cohen, Donati, Edwards, G. Maheswar, Gaze, Girardi, Grankin, Grankin, Haisch, Herbst, Herbst, Herbst, Hiltner, Kurtz, Lada, Landolt, Lata, Lenz, Littlefair, Littlefair, Lomb, Maheswar, Marco, Marco, Marconi, Massey, Meyer, Neelam Chauhan, Negueruela, Percy, Percy, Prisinzano, Robitaille, Scargle, Schaefer, Sharma, Siess, Sneh Lata, Stetson, Stetson, Vallenari, W. P. Chen, Zhang, Zwintz, Zwintz, Zwintz   +55 more
core   +1 more source

Accretion-related properties of Herbig Ae/Be stars. Comparison with T Tauris [PDF]

, 2012
We look for trends relating the mass accretion rate (Macc) and the stellar ages (t), spectral energy distributions (SEDs), and disk masses (Mdisk) for a sample of 38 HAeBe stars, comparing them to analogous correlations found for classical T Tauri stars.
A. Mora, Acke, Acke, Acke, Acke, Acke, Alexander, Alibert, Alibert, Alonso Albi, Altenhoff, Andrews, André, B. Merín, B. Montesinos, Baines, Beckwith, Bertout, Bessell, Bigay, Blondel, Boss, Bowler, C. Eiroa, Caratti o Garatti, Carmona, Carmona, Casey, Cieza, Clarke, Close, Corporon, Coulson, Dodson-Robinson, Draine, Dullemond, Dullemond, Dullemond, Dullemond, Eiroa, Eiroa, Eisner, Fang, Fedele, Fuente, G. Meeus, Garcia Lopez, Glass, Gutermuth, Hartigan, Hartmann, Harvey, Herbst, Hernández, Hernández, Hillenbrand, Hubrig, I. Mendigutía, Isobe, Juhász, Kennedy, Kenyon, Kraus, Kurosawa, Lavalley, Leinert, Malfait, Mannings, Mannings, Mannings, Manoj, Martin-Zaïdi, McNally, Meeus, Meijer, Melnikov, Mendigutía, Mendigutía, Merín, Meyer, Monnier, Montesinos, Mora, Mottram, Muzerolle, Muzerolle, Najita, Natta, Natta, Natta, Oudmaijer, Panić, Patten, Pezzuto, Pirzkal, Piétu, Piétu, Pollack, Pollack, Pérez, R. D. Oudmaijer, Ricci, Robitaille, Robitaille, Roccatagliata, Rodgers, Royer, Salpeter, Sandell, Sandell, Sandell, Sheret, Shu, Sicilia-Aguilar, Siess, Smith, Stark, Sterzik, Sylvester, Sylvester, Takeuchi, Testi, Tetzlaff, Thi, Thi, Thomas, Thé, Tilling, van Boekel, van Boekel, van den Ancker, Vink, Walker, Waters, Weinberger, Wheelwright, Williams, Wolk, York   +138 more
core   +2 more sources

Keck Interferometer Observations of Classical and Weak‐line T Tauri Stars [PDF]

The Astrophysical Journal, 2005
We present observations of the T Tauri stars BP Tau, DG Tau, DI Tau, GM Aur, LkCa 15, RW Aur and V830 Tau, using long baseline infrared interferometry at K band (2.2 microns) from the Keck Interferometer. The target sources have a range of mass accretion rates and excess near-infrared emission.
Akeson, R. L., Boden, A. F., Monnier, J. D., Millan-Gabet, R., Beichman, C., Beletic, J., Calvet, N., Hartmann, L., Hillenbrand, L., Koresko, C., Sargent, A., Tannirkulam, A.   +11 more
openaire   +2 more sources

Photosynthesis under far‐red light—evolutionary adaptations and bioengineering of light‐harvesting complexes

FEBS Letters, Volume 600, Issue 2, Page 164-187, January 2026.
Phototrophs evolved light‐harvesting systems adapted for efficient photon capture in habitats enriched in far‐red radiation. A subset of eukaryotic pigment‐binding proteins can absorb far‐red photons via low‐energy chlorophyll states known as red forms.
Antonello Amelii, Edoardo Andrea Cutolo, Daniele Montepietra, Claudia Battarra, Roberto Caferri, Stefano Capaldi, Zeno Guardini, Luca Dall'Osto, Roberto Bassi   +8 more
wiley   +1 more source