Zobrazeno 91 - 100
of 1 353
pro vyhledávání: '"Fazio, Giovanni"'
Autor:
Hartmann, Lee, Megeath, S. T., Allen, Lori, Luhman, Kevin, Calvet, Nuria, D'Alessio, Paola, Franco-Hernandez, Ramiro, Fazio, Giovanni
Publikováno v:
Astrophys.J.629:881-896,2005
We present infrared photometry obtained with the IRAC camera on the Spitzer Space Telescope of a sample of 82 pre-main sequence stars and brown dwarfs in the Taurus star-forming region. We find a clear separation in some IRAC color-color diagrams bet
Externí odkaz:
http://arxiv.org/abs/astro-ph/0505323
Autor:
Perez-Gonzalez, Pablo G., Rieke, George H., Egami, Eiichi, Alonso-Herrero, Almudena, Dole, Herve, Papovich, Casey, Blaylock, Myra, Jones, Jessica, Rieke, Marcia, Rigby, Jane, Barmby, Pauline, Fazio, Giovanni G., Huang, Jiasheng, Martin, Christopher
Publikováno v:
Astrophys.J.630:82-107,2005
We use a 24 micron selected sample containing more than 8,000 sources to study the evolution of star-forming galaxies in the redshift range from z=0 to z~3. We obtain photometric redshifts for most of the sources in our survey using a method based on
Externí odkaz:
http://arxiv.org/abs/astro-ph/0505101
Autor:
Allen, Lori E., Calvet, Nuria, D'Alessio, Paola, Merin, Bruno, Hartmann, Lee, Megeath, S. Thomas, Gutermuth, Robert A., Muzerolle, James, Pipher, Judith L., Myers, Philip C., Fazio, Giovanni G.
We compare the infrared colors predicted by theoretical models of protostellar envelopes and protoplanetary disks with initial observations of young stellar objects made with the Infrared Array Camera (IRAC) on the Spitzer Space Telescope (Werner et
Externí odkaz:
http://arxiv.org/abs/astro-ph/0406003
Publikováno v:
Astrophys.J. 616 (2004) L67-L70
We present observations of the CO 2-1 and 3-2 transitions toward the merging galaxies of NGC6090 with the Submillimeter Array (SMA) (The Submillimeter Array (SMA) is a joint project between the Smithsonian Astrophysical Observatory and the Academia S
Externí odkaz:
http://arxiv.org/abs/astro-ph/0405435
Autor:
Karovska, Margarita, Marengo, Massimo, Elvis, Martin, Fazio, Giovanni, Hora, Joseph, Hinz, Philip, Hoffmann, William, Meyer, Michael, Mamajek, Eric
Publikováno v:
Astrophys.J. 598 (2003) L91-L94
In this paper we present results from our exploratory mid-IR study of Centaurus A circumnuclear environment using high-angular resolution imaging at the Magellan 6.5m telescope with the MIRAC/BLINC camera. We detected emission from a compact region s
Externí odkaz:
http://arxiv.org/abs/astro-ph/0311139
Autor:
Marengo, Massimo, Karovska, Margarita, Fazio, Giovanni G., Hora, Joseph L., Hoffmann, William F., Dayal, Aditya, Deutsch, Lynne K.
This paper presents results from high-angular resolution mid-IR imaging of the Mira AB circumbinary environment using the MIRAC3 camera at the NASA Infrared Telescope Facility (IRTF). We resolved the dusty circumstellar envelope at 9.8, 11.7 and 18 m
Externí odkaz:
http://arxiv.org/abs/astro-ph/0106344
Autor:
Jayawardhana, Ray, Fisher, R. Scott, Telesco, Charles M., Pina, Robert K., Navascues, David Barrado y, Hartmann, Lee W., Fazio, Giovanni G.
Publikováno v:
Astron.J. 122 (2001) 2047-2054
We have conducted deep mid-infrared imaging of a relatively nearby sample of candidate Vega-like stars using the OSCIR instrument on the CTIO 4-meter and Keck II 10-meter telescopes. Our discovery of a spatially-resolved disk around HR 4796A has alre
Externí odkaz:
http://arxiv.org/abs/astro-ph/0105314
Autor:
Ueta, Toshiya, Speck, Angela K., Meixner, Margaret, Dayal, Aditya, Hora, Joseph L., Fazio, Giovanni G., Deutsch, Lynne K., Hoffmann, William F.
We investigate spatial distributions of specific dust components in the circumstellar shells of a proto-planetary nebula candidate, HD 179821, and a planetary nebula, BD$+30^{\circ}$3639, by means of spectral imaging. With high-resolution ground-base
Externí odkaz:
http://arxiv.org/abs/astro-ph/0010208
Autor:
Ueta, Toshiya, Meixner, Margaret, Dayal, Aditya, Deutsch, Lynne K., Fazio, Giovanni, Hora, Joseph L., Hoffmann, William F.
Publikováno v:
Astrophysical Journal, 2001, 548, 1020
We report detection of an extended mid-infrared emission from \iras 18576+0341 (AFGL 2298). The object shows a dusty circumstellar shell that has diameter of $\age 7\arcsec$ at 10.3 and 18.0 $\um$. The dust nebula shows two emission peaks concentrica
Externí odkaz:
http://arxiv.org/abs/astro-ph/0010099
Autor:
Marengo, Massimo, Jayawardhana, Ray, Fazio, Giovanni G., Hoffmann, William F., Hora, Joseph L., Dayal, Aditya, Deutsch, Lynne K.
Most, if not all, stars are now believed to produce energetic outflows during their formation. Yet, almost 20 years after the discovery of bipolar outflows from young stars, the origins of this violent phenomenon are not well understood. One of the d
Externí odkaz:
http://arxiv.org/abs/astro-ph/0008052