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139 papers · 1 filter
HADES RV Programme with HARPS-N at TNG. VII. Rotation and activity of M-Dwarfs from time-series high-resolution spectroscopy of chromospheric indicators
A. Suárez Mascareño, R. Rebolo, J. I. González Hernández +28
We aim to investigate the presence of signatures of magnetic cycles and rotation on a sample of 71 early M-dwarfs from the HADES RV programme using high-resolution time-series spec…
New spectro-photometric characterization of the substellar object HR 2562 B using SPHERE
D. Mesa, J. -L. Baudino, B. Charnay +32
HR2562 is an F5V star located at ~33 pc from the Sun hosting a substellar companion that was discovered using the GPI instrument. The main objective of the present paper is to prov…
Spectroscopic properties of a two-dimensional time-dependent Cepheid model II. Determination of stellar parameters and abundances
V. Vasilyev, H. -G. Ludwig, B. Freytag +2
Standard spectroscopic analyses of variable stars are based on hydrostatic one-dimensional model atmospheres. This quasi-static approach has theoretically not been validated. We ai…
SNe 2013K and 2013am: observed and physical properties of two slow, normal Type IIP events
L. Tomasella, E. Cappellaro, M. L. Pumo +28
We present one year of optical and near-infrared photometry and spectroscopy of the Type IIP SNe 2013K and 2013am. Both objects are affected by significant extinction, due to their…
The RoPES project with HARPS and HARPS-N. I. A system of super-Earths orbiting the moderately active K-dwarf HD 176986
A. Suárez Mascareño, J. I. González Hernández, R. Rebolo +12
We report the discovery of a system of two super-Earths orbiting the moderately active K-dwarf HD 176986. This work is part of the RoPES RV program of G- and K-type stars, which co…
THESEUS: a key space mission concept for Multi-Messenger Astrophysics
G. Stratta, R. Ciolfi, L. Amati +55
The recent discovery of the electromagnetic counterpart of the gravitational wave source GW170817, has demonstrated the huge informative power of multi-messenger observations. Duri…