Zobrazeno 1 - 10
of 61
pro vyhledávání: '"Dayal, Aditya"'
Autor:
Dayal, Aditya, 1968
The evolution of low- and intermediate-mass stars (1M(⊙) - 8M(⊙)) from the Asymptotic Giant Branch (AGB) to the Planetary Nebula (PN) phase is a poorly understood phase of stellar evolution. We have observed a sample of AGB stars, Proto-Planetary
Externí odkaz:
http://hdl.handle.net/10150/288708
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:
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
Autor:
Latter, William B., Dayal, Aditya, Bieging, John H., Meakin, Casey, Hora, Joseph L., Kelly, Douglas M., Tielens, A. G. G. M.
We report results from a Hubble Space Telescope (HST) and Near-Infrared Camera and Multiobject Spectrometer (NICMOS) program to study the distribution of hot neutral (molecular hydrogen) and ionized circumstellar material in the young planetary nebul
Externí odkaz:
http://arxiv.org/abs/astro-ph/0002469
Autor:
Hora, Joseph L., Latter, William B., Dayal, Aditya, Bieging, John, Kelly, Douglas M., Tielens, A. G. G. M., Trammell, Susan R.
Images of Hubble 12 were obtained with the HST/NICMOS instrument in the F110W, F164N, and F166N filters of NIC1, and the F160W, F187N, F190N, F212N, F215N filters of NIC2. The images show the structure of the inner ``torus'' and lobes much clearer th
Externí odkaz:
http://arxiv.org/abs/astro-ph/0002289
Autor:
Meixner, Margaret, Ueta, Toshiya, Dayal, Aditya, Hora, Joseph L., Fazio, Giovanni, Hrivnak, Bruce J., Skinner, Christopher J., Hoffmann, William F., Deutsch, Lynn K.
Publikováno v:
1999, ApJS, 122, 221
We present the data from a mid-infrared imaging survey of 66 proto-planetary nebula candidates using two mid-IR cameras (MIRAC2 and Berkcam) at the NASA Infrared Telescope Facility and the United Kingdom Infrared Telescope. The goal of this survey is
Externí odkaz:
http://arxiv.org/abs/astro-ph/9812279
Publikováno v:
2013 Annual International Conference on Emerging Research Areas & 2013 International Conference on Microelectronics, Communications & Renewable Energy; 2013, p1-5, 5p
Publikováno v:
2013 Annual International Conference on Emerging Research Areas & 2013 International Conference on Microelectronics, Communications & Renewable Energy; 2013, p1-6, 6p