Results 1 to 10 of about 57,378 (307)

The Coronal X-ray Spectrum of the Multiple Weak-Lined T Tauri Star System HD 98800 [PDF]

, 2004
We present high-resolution X-ray spectra of the multiple (hierarchical quadruple) weak-lined T Tauri star system HD 98800, obtained with the High Energy Transmission Gratings Spectrograph (HETGS) aboard the Chandra X-ray Observatory (CXO).
Claude R. Canizares, David A. Weintraub, David P. Huenemoerder, Favata F., Jingqiang Li, Joel H. Kastner, Norbert S. Schulz, Sylvester R. J.   +7 more
core   +5 more sources

Early Planet Formation in Embedded Disks (eDisk). I. Overview of the Program and First Results

The Astrophysical Journal, 2023
We present an overview of the Large Program, “Early Planet Formation in Embedded Disks (eDisk),” conducted with the Atacama Large Millimeter/submillimeter Array (ALMA).
Nagayoshi Ohashi, John J. Tobin, Jes K. Jørgensen, Shigehisa Takakuwa, Patrick Sheehan, Yuri Aikawa, Zhi-Yun Li, Leslie W. Looney, Jonathan P. Williams, Yusuke Aso, Rajeeb Sharma, Jinshi Sai (Insa Choi), Yoshihide Yamato, Jeong-Eun Lee, Kengo Tomida, Hsi-Wei Yen, Frankie J. Encalada, Christian Flores, Sacha Gavino, Miyu Kido, Ilseung Han, Zhe-Yu Daniel Lin, Suchitra Narayanan, Nguyen Thi Phuong, Alejandro Santamaría-Miranda, Travis J. Thieme, Merel L. R. van ’t Hoff, Itziar de Gregorio-Monsalvo, Patrick M. Koch, Woojin Kwon, Shih-Ping Lai, Chang Won Lee, Adele Plunkett, Kazuya Saigo, Shingo Hirano, Ka Ho Lam, Shoji Mori   +36 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

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

Structure and Computation

Noûs, EarlyView.
ABSTRACT It is a truism of mathematics that differences between isomorphic number systems are irrelevant to arithmetic. This truism is deeply rooted in the modern axiomatic method and underlies most strands of arithmetical structuralism, the view that arithmetic is about some abstract number structure.
Balthasar Grabmayr
wiley   +1 more source

A Tale of Two Stars: X-Ray and Ground-based Observations of Two Diverging Stars in Taurus–Auriga

The Astrophysical Journal
We present XMM-Newton observations and near-simultaneous optical observations of the classical T Tauri star SU Auriga and the nearby Herbig Ae star AB Auriga, two members of the 4 Myr old Taurus–Auriga star-forming region.
Mackenna L. Wood, Hans Moritz Günther, P. C. Schneider, Scott J. Wolk   +3 more
doaj   +1 more source

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

Accretion-powered chromospheres in classical T Tauri stars [PDF]

, 2011
(Abridged) Optical spectra of classical T Tauri stars (cTTS) are rich in emission lines of low-excitation species that are composed of narrow and broad components, related to two regions with different kinematics, densities, and temperatures.
Aiad, Al-Naimi, Alencar, Appenzeller, Ardila, Argiroffi, Artemenko, Basri, Batalha, Berdyugina, Beristain, Beristain, Bertout, Bertout, Bertout, Bertout, Bouvier, Bouvier, Brickhouse, Calvet, Chavarria-K., Cram, Cram, Dall, Donati, Donati, Donati, Donati, Edwards, Edwards, F. M. Walter, Fang, Fischer, G. F. Gahm, Gahm, Gameiro, Grankin, Guenther, Gullbring, Gullbring, Güdel, H. C. Stempels, Hartigan, Hartigan, Hessman, Hussain, Johns, Johns-Krull, Kenyon, Krautter, Kravtsova, Kupka, Kwan, Lamzin, Lamzin, Long, Lorenzetti, Mohanty, Mundt, Muzerolle, Muzerolle, Orlando, P. P. Petrov, Percy, Petrov, Petrov, Petrov, Richter, Romanova, Romanova, Romanova, S. A. Artemenko, Smith, Smith, Stempels, Stempels, Valenti, Van Den Ancker   +77 more
core   +1 more source

Synthetic Biology and Metabolic Engineering of Microalgae for Sustainable Lipid and Terpenoid Production: An Updated Perspective

Plant Biotechnology Journal, EarlyView.
ABSTRACT Microalgae are increasingly recognised as powerful platforms for the sustainable production of lipids and terpenoids, with expanding applications in the food, fuel and biomanufacturing industries. In this updated review, we consolidate and critically assess the most recent advances in synthetic biology and metabolic engineering of key ...
Ty Shitanaka, Yu Wang, Sally Do, Julia Yuson, Samir Kumar Khanal, Krzysztof Zienkiewicz, Zhi‐Yan Du   +6 more
wiley   +1 more source

The frequency of T Tauri companion stars [PDF]

, 1993
We present the results of a magnitude limited (K≤8.5 mag) multiplicity survey of T Tauri stars in two nearby star forming regions, Tauris-Auriga and Ophiuchus-Scorpius.
Ghez, A. M., Matthews, K., Neugebauer, G.   +2 more
core