This project consists of investigating fundamental questions concerning the formation and evolution of galaxies from the smallest galactic scales to those of...
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GrantThe multiple dimensions of the Local Group: galactic evolution from structures, chemistry, dynamics and histories of star formation
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PublicationThe Na-O anticorrelation in horizontal branch stars. IV. M 22
We obtained high-resolution spectra for 94 candidate stars belonging to the HB of M 22 with FLAMES. Previous works have indicated that this cluster has split...
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PublicationThe nature and origin of substructure in the outskirts of M31 - II. Detailed star formation histories
While wide-field surveys of M31 have revealed much substructure at large radii, understanding the nature and origin of this material is not straightforward from...
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PublicationThe Nature of Dust in Compact Galactic Planetary Nebulae from Spitzer Spectra
We present the Spitzer/Infrared Spectrograph (IRS) spectra of 157 compact Galactic planetary nebulae (PNe). These young PNe provide insight on the effects of...
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PublicationThe nature of HH 223 from long-slit spectroscopy
Context: HH 223 is a knotty, undulating nebular emission of ˜30 arcsec length found in the L723 star-forming region. It lies projected onto the largest...
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PublicationThe Nature of Starbursts. I. The Star Formation Histories of Eighteen Nearby Starburst Dwarf Galaxies
We use archival Hubble Space Telescope observations of resolved stellar populations to derive the star formation histories (SFHs) of 18 nearby starburst dwarf...
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PublicationThe Nature of Starbursts. II. The Duration of Starbursts in Dwarf Galaxies
The starburst phenomenon can shape the evolution of the host galaxy and the surrounding intergalactic medium. The extent of the evolutionary impact is partly...
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PublicationThe nature of the Cygnus extreme B supergiant 2MASS J20395358+4222505
2MASS J20395358+4222505 is an obscured early B supergiant near the massive OB star association Cygnus OB2. Despite its bright infrared magnitude (K s = 5.82) it...
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PublicationThe nature of V39: an LBV candidate or LBV impostor in the very low metallicity galaxy IC 1613?
Context. Very few examples of luminous blue variable (LBV) stars or LBV candidates (LBVc) are known, particularly at metallicities below that of the Small...