The VLT-FLAMES survey of massive stars: evolution of surface N abundances and effective temperature scales in the Galaxy and Magellanic Clouds

By C.Trundle, P. Dufton, I. Hunter, C. Evans, D. Lennon, S. Smartt, R. Centre, T. Q. U. O. Belfast, Belfast, UK The Isaac Newton Group of Telescopes and 5 more. 2007

151 citations recorded by the source corpus.

We present an analysis of high resolution VLT-FLAMES spectra of 61 B-type stars with relatively narrow-lined spectra lo cated in 4 fields centered on the Milky Way clusters; NGC3293 & NGC4755 and the Large and Small Magellanic cloud clusters; NGC2004 and NGC330. For each object a quantitative analysis was carried out using the non-LTE model atmosphere code TLUSTY; resulting in the determination of their atmospheric parameters and phot ospheric abundances of the dominant metal species (C, N, O, Mg, Si, Fe). The results are discussed in relation to our earlier work on 3 younger clusters in these galaxies; NGC6611, N11 and NGC346 paying particular attention to the nitrogen abundances which are a n important probe of the role of rotation in the evolution of s tars. This work along with that of the younger clusters provides a consistent dataset of abundances and atmospheric parameters for over 100 B-type stars in the three galaxies. We provide effective temperature scales for B-type dwarfs in all three gal axies and for giants and supergiants in the SMC and LMC. In each galaxy a dependence on luminosity is found between the three classes with the unevolved dwarf objects having significantly higher e ffective temperatures. A metallicity dependence is present b etween the SMC and Galactic dwarf objects, and whilst the LMC stars are only slightly cooler than the SMC stars, they are significantly hotter than the ir Galactic counterparts.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/f6276de4af83ff1b08dfba72b2ce0e807fd7631d

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In Astronomy and Astrophysics

1. N. Langer
2. N. Smith
3. S. Smartt
4. J. Vink
5. M. Limongi
6. A. Chieffi
7. Selma de Mink
8. G. Meynet

In Instrumentation

1. N. Langer
2. J. Vink
3. N. Smith
4. A. Chieffi
5. M. Limongi
6. J. Puls
7. W. Hamann
8. F. Najarro

Citations in the corpus

• The VLT FLAMES Survey of Massive Stars: Rotation and Nitrogen Enrichment as the Key to Understanding Massive Star Evolution (2007, background): “Hunter et al. (2007) and Trundle et al. (2007) (hereafter Papers I and II, respectively) have presented chemical abundances for the narrow-lined objects (predominately slow rotators) in the LMC sample.”
• The empirical metallicity dependence of the mass-loss rate of O- and early B-type stars (2007, methodology): “The abundance of the α elements in the LMC relative to solar from Hunter et al. (2007) and Trundle et al. (2007) is ∆[α/H] = −0.36 ± 0.1 dex.”
• The VLT-FLAMES Tarantula Survey XXVII. Physical parameters of B-type main-sequence binary systems in the Tarantula nebula (2017, unknown): “The LMC baseline nitrogen abundance has been estimated from observations of both H regions (see, for example, Kurt & Dufour 1998; Garnett 1999) and early-type stars (see, for example, Korn et al. 2002, 2005; Hunter et al. 2007; Trundle et al. 2007).”
• Mass loss from hot massive stars (2008, methodology): “12-right, and agrees perfectly with the results from an independent study by Trundle et al (2007).”
• PRE-SUPERNOVA EVOLUTION OF ROTATING SOLAR METALLICITY STARS IN THE MASS RANGE 13–120 M☉ AND THEIR EXPLOSIVE YIELDS (2012, background): “…Program, a series of papers came out over the years presenting a large database of stars for which a quite detailed surface chemical abundances and projected rotational velocities (v sin(i)) are now available (Hunter et al. 2007; Trundle et al. 2007; Hunter et al. 2008, 2009; Dunstall et al. 2011).”
• Present-day cosmic abundances - A comprehensive study of nearby early B-type stars and implications for stellar and Galactic evolution and interstellar dust models (2012, result): “…error estimates of up to 40-60% in surface gravity nd a factor 3-5 in elemental abundances are found in the literature (e.g. Hunter et al. 2007; Trundle et al. 2007). turned out to be chemically homogeneous on the 10% level, corroborating earlier findings from analyses of the ISM gas-phase…”
• Sub-surface convection zones in hot massive stars and their observable consequences (2009, methodology): “We have over plotted the microturbulent velocities derived by Trundle et al. (2007) and Hunter et al. (2008b) as filled circles.”
• The Wolf-Rayet stars in the Large Magellanic Cloud - A comprehensive analysis of the WN class (2014, methodology): “The iron abundance in B-type stars from several clusters in the LMC has been studied by Trundle et al. (2007) (see Table 1).”
• Progenitors of Core-Collapse Supernovae (2009, background): “The merger, interacting binary and rapid rotation models are all still viable and future study of the LMC B-supergiant binary population as well as the Milky Way B-supergiants with ring nebulae seem promising avenues to constrain models further.”
• EXTRAGALACTIC CHEMICAL ABUNDANCES: DO H ii REGIONS AND YOUNG STARS TELL THE SAME STORY? THE CASE OF THE SPIRAL GALAXY NGC 300 (2009, background): “…stellar populations has been derived from alternative tracers, including Cepheid variables (Luck et al. 2003; Romaniello et al. 2008) and B stars (Rolleston et al. 2000; Trundle et al. 2007), H II regions often represent the only source of presentday abundance information for star-forming galaxies.”