| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Matsuura, Mikako
Cardiff University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2023Quantifying the dust in SN 2012aw and iPTF14hls with ORBYTScitations
- 2023Evidence for late-time dust formation in the ejecta of supernova SN 1995N from emission-line asymmetriescitations
- 2021JWST Survey of the Prototypical Core-collapse Supernova Remnant Cassiopeia A
- 2015A stubbornly large mass of cold dust in the ejecta of Supernova 1987Acitations
- 2015From flux to dust mass: Does the grain-temperature distribution matter for estimates of cold dust masses in supernova remnants?citations
- 2010The mass-loss return from evolved stars to the Large Magellanic Cloud. III. Dust properties for carbon-rich asymptotic giant branch starscitations
- 2006Mid-Infrared Spectroscopy of Carbon Stars in the Small Magellanic Cloudcitations
- 2006A Spitzer mid-infrared spectral survey of mass-losing carbon stars in the Large Magellanic Cloudcitations
- 2006A Spitzer mid-infrared spectral survey of mass-losing carbon stars in the Large Magellanic Cloudcitations
Places of action
| Organizations | Location | People |
|---|
article
A Spitzer mid-infrared spectral survey of mass-losing carbon stars in the Large Magellanic Cloud
Abstract
We present a Spitzer Space Telescope spectroscopic survey of mass-losing carbon stars (and one oxygen-rich star) in the Large Magellanic Cloud (LMC). The stars represent the super-wind phase on the asymptotic giant branch (AGB), which forms a major source of dust for the interstellar medium (ISM) in galaxies. Bolometric magnitudes indicate progenitor masses of 1.5-2.5 M ⊙. The spectra cover the wavelength range 5-38 μ. They show varying combinations of dust continuum, dust emission features (SiC, MgS) and molecular absorption bands (C 2H 2, HCN). A 10-μm absorption feature is attributed to C 3. A weak band at 5.8 μm is suggestive of carbonyl. The circumstellar 7.5-μm C 2H 2 band is found to be stronger at lower metallicity, explained by higher C/O ratios at low metallicity. The J - K versus K - A colours, used to select the sample, are shown to be relatively insensitive in separating carbon versus oxygen-rich AGB stars. The predominance of carbon stars therefore indicates that in the range 1.5-2.5 M ⊙, LMC AGB stars become carbon-rich before onset of the superwind. A set of four narrow bands, dubbed the Manchester system, is used to define the infrared continuum for dusty carbon stars. We investigate the strength and central wavelength of the SiC and MgS dust bands as a function of colour and metallicity. The line-to-continuum ratio of these bands shows some indication of being lower at low metallicity. The MgS band is only seen at dust temperatures below 600 K. Metal-poor carbon stars can form amorphous carbon dust from self-produced carbon. The formation efficiency of oxygen-rich dust depends more strongly on metallicity. In lower-metallicity environments, the dust input into the ISM by AGB stars may be strongly biased towards carbonaceous dust. © 2006 RAS.