Results 81 to 90 of about 58,189 (239)

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   +3 more sources

Haro 5-2: A New Pre-main-sequence Quadruple Stellar System

The Astronomical Journal
We have discovered that the H α emission-line star Haro 5-2, located in the 3–6 Myr old Ori OB1b association, is a young quadruple system. The system has a 2+2 configuration, with an outer separation of 2.″6 and with resolved subarcsecond inner binary ...
Bo Reipurth, C. Briceño, T. R. Geballe, C. Baranec, S. Mikkola, A. M. Cody, M. S. Connelley, C. Flores, B. A. Skiff, J. D. Armstrong, N. M. Law, R. Riddle   +11 more
doaj   +1 more source

The magnetosphere of the close accreting PMS binary V4046 Sgr

EPJ Web of Conferences, 2014
V4046 Sagittarii AB is a close short-period classical T Tauri binary. It is a circularised and synchronised system accreting from a circumbinary disk.
Gregory S. G., Holzwarth V. R., Donati J.-F., Hussain G. A. J., Montmerle T., Alecian E., Alencar S. H. P., Argiroffi C., Audard M., Bouvier J., Damiani F., Güdel M., Huenemoerder D. P., Kastner J. H., Maggio A., Sacco G. G., Wade G. A.   +16 more
doaj   +1 more source

Evolution of the T Tauri star population in the Lupus association [PDF]

, 2015
Aims: In a recent study, we derived individual distances for 109 pre-main sequence stars that define the Lupus kinematic association of young stars. Here, we use these new distances to derive the masses and ages of Lupus T Tauri stars with the aim of ...
P. Galli, C. Bertout, R. Teixeira, C. Ducourant   +3 more
semanticscholar   +1 more source

Multiple Rings and Asymmetric Structures in the Disk of SR 21

The Astrophysical Journal, 2023
Crescent-like asymmetric dust structures discovered in protoplanetary disks indicate dust aggregations. Thus, researching these structures helps us understand the planet formation process. Here we analyze ALMA data of the protoplanetary disk around the T-
Yi Yang, Hauyu Baobab Liu, Takayuki Muto, Jun Hashimoto, Ruobing Dong, Kazuhiro Kanagawa, Munetake Momose, Eiji Akiyama, Yasuhiro Hasegawa, Takashi Tsukagoshi, Mihoko Konishi, Motohide Tamura   +11 more
doaj   +1 more source

Magnetospheric accretion on the fully convective classical T Tauri star DN Tau [PDF]

, 2013
We report here results of spectropolarimetric observations of the classical T Tauri star DN Tau carried out (at 2 epochs) with ESPaDOnS at the Canada-France-Hawaii Telescope within the ‘Magnetic Protostars and Planets’ programme.
J. Donati, S. Gregory, S. Alencar, G. Hussain, J. Bouvier, M. Jardine, F. Ménard, C. Dougados, M. Romanova, the MaPP collaboration   +9 more
semanticscholar   +1 more source

Finding new sub-stellar co-moving companion candidates - the case of CT Cha

, 2009
We have searched for close and faint companions around T Tauri stars in the Chamaeleon star forming region. Two epochs of direct imaging data were taken with the VLT Adaptive Optics instrument NaCo in February 2006 and March 2007 in Ks band for the ...
Batalha, Bertout, Brott, Camargo, Ducourant, Gregorio Hetem, Guenther, Joergens, Kholopov, Lawson, Lenzen, Melo, Neuhäuser, Ralph Neuhäuser, Rousset, Tobias Schmidt, Whittet   +16 more
core   +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

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

EVIDENCE FOR AN FU ORIONIS-LIKE OUTBURST FROM A CLASSICAL T TAURI STAR [PDF]

, 2010
We present pre- and post-outburst observations of the new FU Orionis-like young stellar object PTF 10qpf (also known as LkHα 188-G4 and HBC 722). Prior to this outburst, LkHα 188-G4 was classified as a classical T Tauri star (CTTS) on the basis of its ...
Adam A. Miller, L. Hillenbrand, K. Covey, D. Poznanski, J. Silverman, K. Io, W. Kleiser, B. Rojas-Ayala, P. Muirhead, S. Cenko, J. Bloom, M. Mansi, Kasliwal, A. Filippenko, N. Law, E. Ofek, R. Dekany, G. Rahmer, D. Hale, Roger M. Smith, R. Quimby, P. Nugent, J. Jacobsen, J. Zolkower, Viswa, Velur, R. Walters, J. Henning, K. Bui, D. McKenna, S. Kulkarni, C. Klein   +31 more
semanticscholar   +1 more source