scholarly journals Stellar dust production and composition in the Magellanic Clouds

2013 ◽  
Vol 65 (3) ◽  
pp. 223-227 ◽  
Author(s):  
F. Kemper
Keyword(s):  
Magellanic Clouds ◽  
Dust Production ◽  
Stellar Dust

scholarly journals Global Dust Budgets of the Magellanic Clouds

2012 ◽  
Vol 8 (S292) ◽  
pp. 267-270 ◽  
Author(s):  
Mikako Matsuura
Keyword(s):  
Life Cycle ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Magellanic Clouds ◽  
Agb Stars ◽  
Dust Production ◽  
Space Observatory ◽  
Great Opportunity ◽  
Dust Sources ◽  
Nearby Galaxies

AbstractWithin galaxies, gas and dust are constantly exchanged between stars and the interstellar medium (ISM). The life-cycle of gas and dust is the key to the evolution of galaxies. Despite its importance, it is has been very difficult to trace the life-cycle of gas and dust via observations. The Spitzer Space Telescope and Herschel Space Observatory have provided a great opportunity to study the life-cycle of the gas and dust in very nearby galaxies, the Magellanic Clouds. AGB stars are more important contributors to the dust budget in the Large Magellanic Cloud (LMC), while in the Small Magellanic Cloud (SMC), SNe are dominant. However, it seems that the current estimates of the total dust production from AGB stars is insufficient to account for dust present in the ISM. Other dust sources are needed, and supernovae are promising sources. Alternatively the time scale of dust lifetime itself needs some revisions, potentially because they could be unevenly distributed in the ISM or clumps.

scholarly journals The mass-loss, expansion velocities, and dust production rates of carbon stars in the Magellanic Clouds

2019 ◽  
Vol 487 (1) ◽  
pp. 502-521 ◽  
Author(s):  
Ambra Nanni ◽  
Martin A T Groenewegen ◽  
Bernhard Aringer ◽  
Stefano Rubele ◽  
Alessandro Bressan ◽  
...  
Keyword(s):  
Mass Loss ◽  
Mass Loss Rate ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Magellanic Clouds ◽  
Spectral Energy ◽  
Carbon Stars ◽  
Dust Production ◽  
Production Rates ◽  
Total Dust

ABSTRACT The properties of carbon stars in the Magellanic Clouds (MCs) and their total dust production rates are predicted by fitting their spectral energy distributions (SED) over pre-computed grids of spectra reprocessed by dust. The grids are calculated as a function of the stellar parameters by consistently following the growth for several dust species in their circumstellar envelopes, coupled with a stationary wind. Dust radiative transfer is computed taking as input the results of the dust growth calculations. The optical constants for amorphous carbon are selected in order to reproduce different observations in the infrared and optical bands of Gaia Data Release 2. We find a tail of extreme mass-losing carbon stars in the Large Magellanic Cloud (LMC) with low gas-to-dust ratios that is not present in the Small Magellanic Cloud (SMC). Typical gas-to-dust ratios are around 700 for the extreme stars, but they can be down to ∼160–200 and ∼100 for a few sources in the SMC and in the LMC, respectively. The total dust production rate for the carbon star population is ∼1.77 ± 0.45 × 10−5 M⊙ yr−1, for the LMC, and ∼2.52 ± 0.96 × 10−6 M⊙ yr−1, for the SMC. The extreme carbon stars observed with the Atacama Large Millimeter Array and their wind speed are studied in detail. For the most dust-obscured star in this sample the estimated mass-loss rate is ∼6.3 × 10−5 M⊙ yr−1. The grids of spectra are available at:1 and included in the SED-fitting python package for fitting evolved stars.2

scholarly journals The evolution of dust in the local and high-redshift universe

2015 ◽  
Vol 11 (A29B) ◽  
pp. 182-183
Author(s):  
Eli Dwek ◽  
Richard G. Arendt ◽  
Johannes Staguhn ◽  
Tea Temim
Keyword(s):  
Shock Waves ◽  
Interstellar Medium ◽  
Size Distribution ◽  
High Redshift ◽  
Magellanic Clouds ◽  
Core Collapse ◽  
Agb Stars ◽  
Dust Production ◽  
Great Debate ◽  
High Redshift Universe

AbstractDust is a ubiquities component of the interstellar medium (ISM) of galaxies, and manifests itself in many different ways. Yet, its origin, composition, and size distribution are still a matter of great debate. Most of the thermally condensed dust is produced in the explosively expelled ejecta of core collapse supernovae (CCSNe) and in the quiescent winds of AGB stars. Following its injection into the ISM it is destroyed by supernova (SN) shock waves. Knowing the relative rates of these processes is crucial for understanding the nature and evolution of dust in galaxies. In the following we will review three aspects of the evolution of dust in galaxies: the evolution of dust in the ejecta of SN1987A; the rates of dust production and destruction rates in the Magellanic Clouds (MCs), and the evolution of dust in CLASH 2882, a gravitationally-lensed galaxy at z=1.

scholarly journals Dust production rate of asymptotic giant branch stars in the Magellanic Clouds

2014 ◽  
Vol 442 (2) ◽  
pp. 1440-1450 ◽  
Author(s):  
Raffaella Schneider ◽  
Rosa Valiante ◽  
Paolo Ventura ◽  
Flavia dell'Agli ◽  
Marcella Di Criscienzo ◽  
...  
Keyword(s):  
Production Rate ◽  
Magellanic Clouds ◽  
Asymptotic Giant Branch ◽  
Asymptotic Giant Branch Stars ◽  
Dust Production ◽  
Giant Branch Stars

The dust production rate of carbon-rich stars in the Magellanic Clouds

2018 ◽  
Vol 14 (S343) ◽  
pp. 478-479
Author(s):  
Ambra Nanni ◽  
Martin A. T. Groenewegen ◽  
Bernhard Aringer ◽  
Paola Marigo ◽  
Stefano Rubele ◽  
...  
Keyword(s):  
Radiative Transfer ◽  
Energy Distribution ◽  
Mass Loss ◽  
Optical Constants ◽  
Spectral Energy Distribution ◽  
Magellanic Clouds ◽  
The Other ◽  
Spectral Energy ◽  
Circumstellar Envelopes ◽  
Dust Production

AbstractWe present our new investigation aimed to estimate the mass-loss and dust production rates of carbon-rich stars (C-stars) in the Magellanic Clouds (MCs). We compute dust growth and radiative transfer in circumstellar envelopes of C-stars for a grid of stellar parameters and for selected optical constants that simultaneously reproduce the main colour–colour diagrams in the infrared. We employ these grids of spectra to fit the spectral energy distribution of C-stars in the MCs. We find that our estimates can be significantly different from the other ones in the literature.

scholarly journals Molecules and dust production in the Magellanic Clouds

2008 ◽  
Vol 487 (3) ◽  
pp. 1055-1073 ◽  
Author(s):  
J. Th. van Loon ◽  
M. Cohen ◽  
J. M. Oliveira ◽  
M. Matsuura ◽  
I. McDonald ◽  
...  
Keyword(s):  
Magellanic Clouds ◽  
Dust Production

Novae in the Magellanic Clouds

1979 ◽  
Vol 46 ◽  
pp. 96-101
Author(s):  
J.A. Graham
Keyword(s):  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Magellanic Clouds ◽  
University Of Michigan ◽  
The Past ◽  
Spectroscopic Information ◽  
Objective Prism ◽  
The University ◽  
Small Cloud ◽  
Low Dispersion

During the past several years, a systematic search for novae in the Magellanic Clouds has been carried out at Cerro Tololo Inter-American Observatory. The Curtis Schmidt telescope, on loan to CTIO from the University of Michigan is used to obtain plates every two weeks during the observing season. An objective prism is used on the telescope. This provides additional low-dispersion spectroscopic information when a nova is discovered. The plates cover an area of 5°x5°. One plate is sufficient to cover the Small Magellanic Cloud and four are taken of the Large Magellanic Cloud with an overlap so that the central bar is included on each plate. The methods used in the search have been described by Graham and Araya (1971). In the CTIO survey, 8 novae have been discovered in the Large Cloud but none in the Small Cloud. The survey was not carried out in 1974 or 1976. During 1974, one nova was discovered in the Small Cloud by MacConnell and Sanduleak (1974).

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