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Related papers: Mass loss from red giants in the Magellanic Clouds

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I review existing methods for determining mass-loss rates of red giants and red supergiants based on infrared data. The simplest method is based on models for the absorption and emission by dust which forms in the dense outflows from these…

Astrophysics · Physics 2014-10-13 Jacco Th. van Loon

We report the detection of oxygen-rich circumstellar envelopes in stars of the nearby (700 kpc) starburst galaxy IC 10. The star formation history and the chemical environment of this galaxy makes it an ideal target to observe dust…

Solar and Stellar Astrophysics · Physics 2015-06-11 V. Lebouteiller , G. C. Sloan , M. A. T. Groenewegen , M. Matsuura , D. Riebel , D. G. Whelan , J. Bernard-Salas , P. Massey , E. Bayet

We present high-resolution maps of the dust reddening in the Magellanic Clouds (MCs). The maps cover the Large and Small Magellanic Cloud (LMC and SMC) area and have a spatial angular resolution between $\sim$ 26 arcsec and 55 arcmin. Based…

Astrophysics of Galaxies · Physics 2022-01-19 B. -Q. Chen , H. -L. Guo , J. Gao , M. Yang , Y. -L. Liu , B. -W. Jiang

Red supergiants (RSGs) are a He-burning phase in the evolution of moderately high mass stars (10-25 solar masses). The evolution of these stars, particularly at low metallicities, is still poorly understood. The latest-type RSGs in the…

Astrophysics · Physics 2007-08-23 Emily M. Levesque , Philip Massey , K. A. G. Olsen , Bertrand Plez

Mass-loss rates during the red supergiant phase are very poorly constrained from an observational or theoretical point of view. However, they can be very high, and make a massive star lose a lot of mass during this phase, influencing…

Solar and Stellar Astrophysics · Physics 2015-12-09 Cyril Georgy , Sylvia Ekström

The Magellanic Clouds offer a unique variety of star forming regions seen as bright nebulae of ionized gas, related to bright young stellar associations. Nowadays, observations with the high resolving efficiency of the Hubble Space…

Astrophysics · Physics 2009-11-13 Dimitrios A. Gouliermis

Context: Mass loss from red giants in old globular clusters affects the horizontal branch (HB) morphology and post-HB stellar evolution including the production of ultraviolet-bright stars, dredge up of nucleosynthesis products and…

Astrophysics · Physics 2009-10-05 Iain McDonald , Jacco Th. van Loon

The Magellanic Clouds, especially the Large Magellanic Cloud, are places where multiple distance indicators can be compared with each other in a straight-forward manner at considerable precision. We here review the distances derived from…

Astrophysics of Galaxies · Physics 2015-06-03 Alistair R Walker

We provide mass-loss rate predictions for O stars from Large and Small Magellanic Clouds. We calculate global (unified, hydrodynamic) model atmospheres of main sequence, giant, and supergiant stars for chemical composition corresponding to…

Solar and Stellar Astrophysics · Physics 2018-04-25 Jiri Krticka , Jiri Kubat

We present ISO photometric and spectroscopic observations of a sample of 57 bright Asymptotic Giant Branch stars and red supergiants in the Large Magellanic Cloud, selected on the basis of IRAS colours indicative of high mass-loss rates.…

We are examining mass loss from globular clusters giant stars, focussing on metallicity dependance. We present three sets of observations: TIMMI-2 mid-IR spectra of 47 Tuc, UVES high-resolution optical spectra of several clusters, and an…

Astrophysics · Physics 2007-05-23 Iain McDonald , Jacco Th. van Loon

Using Spitzer IRAC and MIPS observations of the Large Magellanic Cloud, we have identified 13 objects that have extremely red mid-IR colors. Follow-up Spitzer IRS observations of seven of these sources reveal varying amounts of SiC and C2H2…

Astrophysics · Physics 2008-12-18 R. A. Gruendl , Y. -H. Chu , J. P. Seale , M. Matsuura , A. K. Speck , G. C. Sloan , L. W. Looney

We study the emission by dust and stars in the Large and Small Magellanic Clouds, a pair of low-metallicity nearby galaxies, as traced by their spatially resolved spectral energy distributions (SEDs). This project combines Herschel Space…

The mass loss rates of red supergiants (RSGs) govern their evolution towards supernova and dictate the appearance of the resulting explosion. To study how mass-loss rates change with evolution we measure the mass-loss rates (\mdot) and…

Solar and Stellar Astrophysics · Physics 2016-08-24 Emma R. Beasor , Ben Davies

We observed a sample of evolved stars in the Large and Small Magellanic Clouds (LMC and SMC) with the Infrared Spectrograph on the Spitzer Space Telescope. Comparing samples from the SMC, LMC, and the Galaxy reveals that the dust-production…

The Magellanic System represents one of the best places to study the formation and evolution of galaxies. Photometric surveys of various depths, areas and wavelengths have had a significant impact on our understanding of the system;…

We present the first quantitative results explaining the presence in the Large Magellanic Cloud of some asymptotic giant branch stars that share the properties of lithium rich carbon stars. A self-consistent description of time-dependent…

Astrophysics · Physics 2009-10-31 P. Ventura , F. D'Antona , I. Mazzitelli

We present an analysis of line-of-sight extinction measurements obtained using data from the Magellanic Clouds Photometric Survey, which provides 4-filter photometry for millions of stars in the Large Magellanic Cloud. We find that visual…

Astrophysics · Physics 2009-07-28 Dennis Zaritsky

Massive evolved stars can produce large amounts of dust, and far-infrared (IR) data are essential for determining the contribution of cold dust to the total dust mass. Using Herschel, we search for cold dust in three very dusty massive…

The past decade has witnessed impressive progress in our understanding of the physical properties of massive stars in the Magellanic Clouds, and how they compare to their cousins in the Galaxy. I summarise new results in this field,…

Astrophysics · Physics 2009-11-13 Christopher J. Evans