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Last name: ROMANIELLO
First name: M.
Astronomy and Astrophysics, 480, pp. 379-395, http://dx.doi.org./10.1051/0004-6361:20064854
Astronomy and Astrophysics, 474, pp. 105-119, http://dx.doi.org./10.1051/0004-6361:7806
International audience
International audience
We present new and accurate radial velocity (RV) measurements of luminous stars of all ages (old horizontal branch, intermediate-age red clump, and young blue plume, as well as red giants of a range of ages: 20.6
We present new homogeneous measurements of Na, Al, and three alpha-elements (Mg, Si, Ca) for 75 Galactic Cepheids. The abundances are based on high spectral resolution (R~ 38 000) and high signal-to-noise ratio (S/N ~ 50-300) spectra collected with UVES at ESO VLT. The current measurements were complemented with Cepheid abundances provided by...
International audience
We gathered more than 1130 high-resolution optical spectra for more than 250 Galactic classical Cepheids. The spectra were collected with the optical spectrographs UVES at VLT, HARPS at 3.6 m, FEROS at 2.2 m MPG/ESO, and STELLA. To improve the effective temperature estimates, we present more than 150 new line depth ratio (LDR) calibrations that...
International audience
We present the first spectroscopic abundance determination of iron, alpha-elements (Si, Ca, and Ti), and sodium for the Mira variable V1 in the metal-rich globular cluster NGC 5927. We use high-resolution (R ˜ 28,000), high signal-to-noise ratio (˜200) spectra collected with WINERED, a near-infrared (NIR) spectrograph covering simultaneously...
We present the first spectroscopic abundance determination of iron, alpha-elements (Si, Ca, and Ti), and sodium for the Mira variable V1 in the metal-rich globular cluster NGC 5927. We use high-resolution (R ˜ 28,000), high signal-to-noise ratio (˜200) spectra collected with WINERED, a near-infrared (NIR) spectrograph covering simultaneously...