TY - JOUR 
A1 - Jiménez-Esteban, F. M.
AU - Rizzo Caminos, José Ricardo
AU - Palau, Aina
T1 - Multiple Shells Around G79.29+0.46 Revealed from Near-Ir to Millimeter Data
Y1 - 2010
SN - 0004637X
UR - http://hdl.handle.net/11268/1022
AB - Aiming to perform a study of the warm dust and gas in the luminous blue variable star G79.29+0.46 and its associated nebula, we present infrared Spitzer imaging and spectroscopy, and new CO J = 2 -> 1 and 4 -> 3 maps obtained with the IRAM 30 m radio telescope and the Submillimeter Telescope, respectively. We have analyzed the nebula detecting multiple shells of dust and gas connected to the star. Using Infrared Spectrograph-Spitzer spectra, we have compared the properties of the central object, the nebula, and their surroundings. These spectra show a rich variety of solid-state features (amorphous silicates, polycyclic aromatic hydrocarbons, and CO(2) ices) and narrow emission lines, superimposed on a thermal continuum. We have also analyzed the physical conditions of the nebula, which point to the existence of a photo-dissociation region.
KW - Circumstellar Matter
KW - Dust, Extinction
KW - Ism: Individual Objects (G79.29+0.46)
KW - ISM: Lines and Bands
KW - Stars: Evolution
KW - Stars: Mass-Loss
KW - Luminous Blue Variables
KW - Spitzer-Space-Telescope
KW - Ring Nebula
KW - G79.29+0.46
KW - Photodissociation Regions
KW - Supernova Remnant
KW - Hii-Regions
KW - Infrared-Spectroscopy
KW - Interstellar Dust
KW - Ion Irradiation
KW - Star-Formation
KW - Astronomy & Astrophysics
KW - Astrofísica
KW - Biología espacial
LA - eng
ER -