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53 papers · 1 filter
Atomic and Molecular Data for Optical Stellar Spectroscopy
U. Heiter, K. Lind, M. Asplund +7
High-precision spectroscopy of large stellar samples plays a crucial role for several topical issues in astrophysics. Examples include studying the chemical structure and evolution…
New Extinction and Mass Estimates of the Low-mass Companion 1RXS 1609 B with the Magellan AO System: Evidence of an Inclined Dust Disk
Ya-Lin Wu, Laird M. Close, Jared R. Males +9
We used the Magellan adaptive optics system to image the 11 Myr substellar companion 1RXS 1609 B at the bluest wavelengths to date (z' and Ys). Comparison with synthetic spectra yi…
Temporal evolution of multiple evaporating ribbon sources in a solar flare
D. R. Graham, G. Cauzzi
We present new results from the Interface Region Imaging Spectrograph showing the dynamic evolution of chromospheric evaporation and condensation in a flare ribbon, with the highes…
X-Shooter study of accretion in -Ophiucus: very low-mass stars and brown dwarfs
C. F. Manara, L. Testi, A. Natta +1
We present new VLT/X-Shooter optical and NIR spectra of a sample of 17 candidate young low-mass stars and BDs in the rho-Ophiucus cluster. We derived SpT and Av for all the targets…
The Gaia-ESO Survey: N-body modelling of the Gamma Velorum cluster
M. Mapelli, A. Vallenari, R. D. Jeffries +22
The Gaia-ESO Survey has recently unveiled the complex kinematic signature of the Gamma Velorum cluster: this cluster is composed of two kinematically distinct populations (hereafte…
WISE colours and star-formation in the host galaxies of radio-loud narrow-line Seyfert 1
A. Caccianiga, S. Anton, L. Ballo +7
We investigate the mid-infrared properties of the largest (42 objects) sample of radio-loud narrow-line Seyfert 1 (RL NLS1) collected to date, using data from the Wide-field Infrar…