Results 41 to 50 of about 7,215 (204)

CO Rovibrational Emission as a Probe of Inner Disk Structure [PDF]

, 2011
We present an analysis of CO emission lines from a sample of T Tauri, Herbig Ae/Be, and transitional disks with known inclinations in order to study the structure of inner disk molecular gas.
Blake, G. A., Boogert, A. C. A., Brown, J. M., Salyk, C.   +3 more
core   +3 more sources

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

Australian Veterinary Journal, EarlyView.
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

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

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

Pre-main sequence stars in the Lagoon Nebula (M8) [PDF]

, 2006
We report the discovery of new pre-main sequence (PMS) stars in the Lagoon Nebula (M8) at a distance of 1.25 kpc, based on intermediate resolution spectra obtained with the Boller & Chivens spectrograph at the 6.5-m Magellan I telescope (Las Campanas ...
Arias, Bally, Barbá, Basri, Cieza, Damiani, Drew, Hartigan, Hernández, Hirth, Hirth, J. I. Arias, Jacoby, Kenyon, Kun, Kwan, Lada, Lightfoot, Martín, Martín, Martín, Meyer, Mundt, N. I. Morrell, Palla, Pickles, Prisinzano, R. H. Barbá, Rieke, Skrutskie, Sung, Torres-Dodgen, Tothill, Van Den Ancker, Walker, White   +35 more
core   +4 more sources

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

Observational Constraints on the Formation and Evolution of Binary Stars [PDF]

, 2001
We present a high spatial resolution UV to NIR survey of 44 young binary stars in Taurus with separations of 10-1000 AU. The primary results include: (1) The relative ages of binary star components are more similar than the relative ages of randomly ...
A. M. Ghez, Baraffe I., Bastien P., Bate M. R., Bertout C., Boss A. P., Bouvier J., Brandner W., Duchene G., Duchene G., Duquennoy A., Dutrey A., Dutrey A., Duvert G., Gahm G. F., Guilloteau S., Haas M., Hall S. M., Herbig G. H., Hessman F. V., Kohler R., Labeyrie A., Leinert Ch., Leinert Ch., Magazzu A., Martin E. L., Moneti A., Monin J.-L., Monin J.-L., Preibisch T., R. J. White, Reipurth B., Rice J. B., Richichi A., Sartoretti P., Schwartz R. D., Wichmann R., Woitas J.   +37 more
core   +3 more sources

Higher Objectives of Islamic Law (Maqāṣid al‐Sharīʿa) in Substantiating Justice in Land Tax

The Muslim World, EarlyView.
Abstract This article discusses the relationship between the systemization of kharāj (land tax) and the higher objective of Islamic law or Maqāṣid al‐Sharīʿa. After the conquest of Sawād region (located in modern‐day southern Iraq), the First Caliph ʿUmar (634 ‐ 644 CE) introduced a new approach to the distribution of ghanīmah (spoils of war), leaving ...
Öznur Özdemir, Mehmet Asutay
wiley   +1 more source

MAGNETOSPHERIC ACCRETION IN T TAURI STARS: OBSERVATIONAL TEST

Odessa Astronomical Publications, 2017
In the classical T Tauri stars (CTTS) the magnetic field plays an important role in the interaction between the star and the accretion disk. In 1996-2000 we have carried out an extensive spectroscopic and photometric monitoring of the extremly active ...
P. P. Petrov
doaj   +1 more source

Nonradial and nonpolytropic astrophysical outflows IX. Modeling T Tauri jets with a low mass-accretion rate

, 2011
Context: A large sample of T Tauri stars exhibits optical jets, approximately half of which rotate slowly, only at ten per cent of their breakup velocity.
Agra-Amboage, Aibéo, Anderson, André, Bardeen, Beck, Bertout, Blandford, Bouvier, Bouvier, Bouvier, C. Sauty, Cabrit, Cabrit, Calvet, Casse, Choi, Cieza, Clarke, Contopoulos, Decampli, Donati, Dougados, Edwards, Edwards, Fendt, Ferreira, Ferreira, Ferro-Fontán, Garcia, Garcia, Ghosh, Ghosh, Gracia, Gómez de Castro, Gómez de Castro, Günther, Hartigan, Herbst, J. J. G. Lima, K. Tsinganos, Koide, Kopp, Krasnopolsky, Kundurthy, Kwan, Küker, Lavalley-Fouquet, Li, Lima, Marilli, Matsakos, Matsakos, Matt, Matt, Matt, Matt, Matt, Meliani, Mestel, Mestel, Mora, N. Globus, Ouyed, Petrov, Pudritz, Rebull, Rebull, Rebull, Romanova, Sauty, Sauty, Sauty, Sauty, Sauty, Schatzman, Schwartz, Shang, Shu, Spruit, St-Onge, Stassun, Stassun, Stute, Ustyugova, V. Cayatte, Vidotto, Vidotto, Vlahakis, Vlahakis, Walter, Weber, Z. Meliani, Zanni   +93 more
core   +2 more sources