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Infall of gas as the formation mechanism of stars up to 20 times more massive than the Sun
Maria T. Beltran, Riccardo Cesaroni, Claudio Codella +3
Theory predicts and observations confirm that low-mass stars (like the Sun) in their early life grow by accreting gas from the surrounding material. But for stars ~ 10 times more m…
Accretion in rho-Ophiuchi brown dwarfs: infrared hydrogen line ratios
T. Gatti, L. Testi, A. Natta +2
Mass accretion rate determinations are fundamental for an understanding of the evolution of pre-main sequence star circumstellar disks. Magnetospheric accretion models are used to…
Accretion Rates in Herbig Ae stars
R. Garcia Lopez, A. Natta, L. Testi +1
Accretion rates from disks around pre-main sequence stars are of importance for our understanding of planetary formation and disk evolution. We provide in this paper estimates of t…
Searching for massive pre--stellar cores through observations of N2H+ and N2D+
F. Fontani, P. Caselli, A. Crapsi +4
We have measured the deuterium fractionation (through the column density ratio N(N2D+)/N(N2H+)) and the CO depletion factor (ratio between expected and observed CO abundance) in a…
A Keplerian gaseous disk around the B0 star R Mon
A. Fuente, T. Alonso-Albi, R. Bachiller +4
We present high-angular resolution observations of the circumstellar disk around the massive Herbig Be star R Mon (M~8 Msun) in the continuum at 2.7mm and 1.3mm and the CO 1->0 and…
Constraining the wind launching region in Herbig Ae stars: AMBER/VLTI spectroscopy of HD104237
E. Tatulli, A. Isella, A. Natta +3
We investigate the origin of the emission of the Herbig Ae star HD104237 on Astronomical Unit (AU) scales. Using AMBER/VLTI at a spectral resolution R=1500 spatially…