0000000000226175

AUTHOR

Tomaz Zwitter

showing 2 related works from this author

The Gaia-ESO Survey: Dynamics of ionized and neutral gas in the Lagoon nebula (M 8)

2017

Aims. We present a spectroscopic study of the dynamics of the ionized and neutral gas throughout the Lagoon nebula (M 8), using VLT-FLAMES data from the Gaia-ESO Survey. The new data permit exploration of the physical connections between the nebular gas and the stellar population of the associated star cluster NGC 6530. Methods. We characterized through spectral fitting emission lines of Hα, [N II] and [S II] doublets, [O III], and absorption lines of sodium D doublet, using data from the FLAMES-Giraffe and UVES spectrographs, on more than 1000 sightlines toward the entire face of the Lagoon nebula. Gas temperatures are derived from line-width comparisons, densities from the [S II] doublet …

HII regionsStellar populationAstrophysics::High Energy Astrophysical PhenomenaDoubly ionized oxygenFOS: Physical sciencesAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciences7. Clean energy0103 physical sciencesProtostarAstrophysics::Solar and Stellar AstrophysicsHII region010303 astronomy & astrophysicsISM: individual objects: Lagoon nebulaSolar and Stellar Astrophysics (astro-ph.SR)Astrophysics::Galaxy AstrophysicsO-type starISM: generalPhysicsNebulageneral [ISM]010308 nuclear & particles physicsMolecular cloudHII regions; ISM: general; ISM: individual objects: Lagoon nebula; Astronomy and Astrophysics; Space and Planetary ScienceAstronomy and AstrophysicsAstrophysics - Astrophysics of Galaxiesindividual objects: Lagoon nebula [ISM]StarsStar clusterAstrophysics - Solar and Stellar Astrophysics13. Climate actionSpace and Planetary ScienceAstrophysics of Galaxies (astro-ph.GA)Astrophysics::Earth and Planetary Astrophysics
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The Gaia-ESO Survey: Catalogue of Hα emission stars

2015

We discuss the properties of Hα emission stars across the sample of 22035 spectra from the Gaia-ESO Survey internal data release, observed with the GIRAFFE instrument and largely belonging to stars in young open clusters. Automated fits using two independent Gaussian profiles and a third component that accounts for the nebular emission allow us to discern distinct morphological types of Hα line profiles with the introduction of a simplified classification scheme. All in all, we find 3765 stars with intrinsic emission and sort their spectra into eight distinct morphological categories: single-component emission, emission blend, sharp emission peaks, double emission, P-Cygni, inverted P-Cygni…

PhysicscatalogStars: emission-line BeStar formationAstrophysics::High Energy Astrophysical PhenomenaSIMBADstars: peculiarAstronomy and AstrophysicsAstrophysics::Cosmology and Extragalactic AstrophysicsAstrophysicsopen clusters and associations: generalAstronomy and AstrophysicSpectral lineStarsline: profile13. Climate actionSpace and Planetary ScienceStellar physicsstars: activityAstrophysics::Solar and Stellar AstrophysicsEmission spectrumAstrophysics::Galaxy AstrophysicsOpen clusterLine (formation)
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