Search Publications
Identification of Planetary and Proto-Planetary Nebulae Candidates Through AKARI Infrared Photometry
Corral, L. J.; Ramos-Larios, G.; Kemp, S. N. +3 more
We utilized photometric data from the space telescope AKARI to identify potential planetary nebulae (PNe) and proto-planetary nebulae (PPNe) candidates. Using the color-color diagram, we found a region with a high concentration of established PNe and PPNe, comprising about 95% of the objects. Based on this, we identified 67 objects within this reg…
Infrared characteristics of the BIS catalog objects
Nesci, R.; Rossi, C.; Gaudenzi, S. +3 more
We studied several color-color infrared diagrams of the 276 late type stars of the BIS catalog. For 95 of these stars we derived spectral classification from our slit spectroscopy. From the 2MASS color diagram we concluded that none of the sample stars is a dwarf. The WISE 3.4-12 vs 12-22 plot is the best to discriminate the variability type (Mira…
Spectral Properties and Variability of BIS objects
Nesci, R.; Rossi, C.; Gaudenzi, S. +3 more
Through the analysis and interpretation of newly obtained and of literature data we have clarified the nature of poorly investigated IRAS point sources classified as late type stars, belonging to the Byurakan IRAS Stars catalog. From medium resolution spectroscopy of 95 stars we have strongly revised 47 spectral types and newly classified 31 sourc…
Spectroscopic analysis of four post-AGB candidates
Pereira, C. B.; Arellano Ferro, A.; Muneer, S. +2 more
We have done a detailed abundance analysis of four unexplored candidate post- Asymptotic Giant Branch(AGB) stars IRAS 13110 - 6629, IRAS 17579 - 3121, IRAS 18321 - 1401 and IRAS 18489 - 0629 using high resolution spectra. We have constructed Spectral Energy Distributions (SED) for these objects using the existing photometric data combined with inf…
A one-sided knot ejection at the core of the HH 111 outflow
Loinard, L.; Rodríguez, L. F.; Gómez, L.
We present an astrometry study of the radio source VLA 1 at the core of the HH 111 outflow using new data (2007) as well as archival observations (1992-1996). All data were taken at 3.6 cm with the Very Large Array in its most extended (A) configuration. The source VLA 1 has undergone a dramatic morphological change, showing a one-sided knot eject…
Mid- and Far-Infrared Photometry of Galactic Planetary Nebulae with the AKARI All-Sky Survey
Phillips, J. P.; Márquez-Lugo, R. A.
We provide mid- and far-infrared photometry of 857 Galactic planetary nebulae (PNe) using data derived from the AKARI All-Sky Survey. These include fluxes at 9 and 18 µm obtained with the Infrared Camera (IRC), and at 65, 90, 140 and 160 µm using the far-Infrared Surveyor (FIS). It is noted that the IR luminosities of the youngest PNe …