Results 1 to 10 of about 36,511 (156)

Flared Disks and Silicate Emission in Young Brown Dwarfs [PDF]

, 2004
We present mid-infrared photometry of three very young brown dwarfs located in the $\rho$ Ophiuchi star-forming region -- GY5, GY11 and GY310 --obtained with the Subaru 8-meter telescope.
Antonella Natta, Comeron F., David Barrado y Navascués, D’Antona F., Motohide Tamura, Ray Jayawardhana, Subhanjoy Mohanty, Takuya Fujiyoshi   +7 more
core   +1 more source

Vertical structure models of T Tauri and Herbig Ae/Be disks [PDF]

, 2002
In this paper we present detailed models of the vertical structure (temperature and density) of passive irradiated circumstellar disks around T Tauri and Herbig Ae/Be stars.
A. Natta, Aikawa, Beckwith, Bell, Bell, C. P. Dullemond, Calvet, Chiang, Chiang, D'Alessio, D'Alessio, Draine, Dullemond, Dullemond, G. J. van Zadelhoff, Guilloteau, Hogerheijde, Hubeny, Kenyon, Kudritzki, Malbet, Malbet, Natta, Ng, Rybicki, Sincell   +25 more
core   +3 more sources

Accretion in Brown Dwarfs: an Infrared View [PDF]

, 2004
This paper presents a study of the accretion properties of 19 very low mass objects (Mstar .01-0.1 Msun) in the regions Chamaeleon I and rho-Oph For 8 objects we obtained high resolution Halpha profiles and determined mass accretion rate Macc and ...
A. Natta, Bacciotti, Baraffe, Bate, Bontemps, Comerón, Comerón, D'Antona, Edwards, F. Comerón, Fernández, Folha, Greene, Gullbring, Gómez, J. Muzerolle, Jayawardhana, Jayawardhana, Jayawardhana, Jörgens, L. Testi, Liu, Luhman, Muzerolle, Muzerolle, Muzerolle, Muzerolle, Muzerolle, Muzerolle, Natta, Natta, P. Persi, Rebull, S. Randich, Testi, Whelan, White, White, Wilking, Williams   +39 more
core   +1 more source

Brown dwarf disks with ALMA [PDF]

, 2014
We present ALMA continuum and spectral line data at 0.89 mm and 3.2 mm for three disks surrounding young brown dwarfs and very low mass stars in the Taurus star forming region.
de Gregorio-Monsalvo, I., Isella, A., Natta, A., Ricci, L., Scholz, A., Testi, L.   +5 more
core   +3 more sources

Strong Near-Infrared Emission Interior to the Dust-Sublimation Radius of Young Stellar Objects MWC275 and AB Aur [PDF]

, 2008
Using the longest optical-interferometeric baselines currently available, we have detected strong near-infrared (NIR) emission from inside the dust-destruction radius of Herbig Ae stars MWC275 and AB Aur.
A. Tannirkulam, Akeson, Calvet, Carr, Dullemond, E. Pedretti, Eisner, Eisner, Ferguson, H. McAlister, J. D. Monnier, J. Sturmann, Kraus, L. Sturmann, Millan-Gabet, Millan-Gabet, Monnier, Monnier, Monnier, Muzerolle, Muzerolle, N. Turner, R. Millan-Gabet, Shakura, Sitko, T. A. ten Brummelaar, T. J. Harries, Tannirkulam, ten Brummelaar, Vinkovic, Wassell   +30 more
core   +3 more sources

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

The inner circumstellar disk of the UX Ori star V1026 Sco [PDF]

, 2014
The UX Ori type variables (named after the prototype of their class) are intermediate-mass pre-main sequence objects. One of the most likely causes of their variability is the obscuration of the central star by orbiting dust clouds.
Dugué, M., Duvert, G., Hofmann, K. -H., Kishimoto, M., Kraus, S., Kreplin, A., Lagarde, S., Massi, F., Schertl, D., Vural, J., Weigelt, G.   +10 more
core   +2 more sources

Accretion in the Rho-Oph pre-main sequence stars

, 2006
The aim of this paper is to provide a measurement of the mass accretion rate in a large, complete sample of objects in the core of the star forming region Rho-Oph.
A. Natta, Alexander, Balbus, Barsony, Barsony, Bontemps, Calvet, D'Antona, Doppmann, Feigelson, Greene, Gullbring, Hartmann, Hueso, Imanishi, Johns-Krull, Kenyon, L. Testi, Luhman, Meyer, Muzerolle, Muzerolle, Muzerolle, Muzerolle, Muzerolle, Natta, Natta, Ozawa, Preibisch, Ratzka, S. Randich, Shakura, Siess, Wallace, White, White, Wilking   +36 more
core   +1 more source

A low optical depth region in the inner disk of the HerbigAe star HR5999 [PDF]

, 2011
Circumstellar disks surrounding young stars are known to be the birthplaces of planets, and the innermost astronomical unit is of particular interest.
A. Isella, A. Mérand, A. Natta, Bagnoli, Benisty, Chelli, de Winter, Dullemond, E. Thiébaut, Eiroa, Eisner, Eisner, Eisner, F. Malbet, F. Massi, G. Weigelt, Grady, Haubois, Henning, Hillenbrand, Hubrig, Isella, Isella, J. L. Monin, J. P. Berger, Jennison, Kama, Kraus, Kraus, L. Testi, Lachaume, Le Bouquin, Le Bouquin, M. Benisty, M. Vannier, Millan-Gabet, Monnier, Monnier, Monnier, Natta, P. J. V. Garcia, Pauls, Perez, Perez, Petrov, Pollack, Preibisch, Renard, Rodrigues, S. Renard, Schöller, Siebenmorgen, Sitko, Stecklum, Strong, Tannirkulam, Tannirkulam, Tatulli, Thiébaut, Tjin, van Boekel, Weingartner, Zhao   +62 more
core   +3 more sources

Activation cross sections of $\alpha$-particle induced nuclear reactions on hafnium and deuteron induced nuclear reaction on tantalum: production of $^{178}$W/$^{178m}$Ta generator

, 2014
In the frame of a systematic study of charged particle production routes of medically relevant radionuclei, the excitation function for indirect production of $^{178m}$Ta through $^{nat}$Hf($\alpha$,xn)$^{178}$W-$^{178m}$Ta nuclear reaction was measured ...
Ditrói, F., Hermanne, A., Ignatyuk, A. V., Tak'acs, S., Tárk'anyi, F., Uddin, M. S.   +5 more
core   +1 more source