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Gaia Data Release 2: Observational Hertzsprung-Russell diagrams
Gaia Collaboration, C. Babusiaux, F. van Leeuwen +450
We highlight the power of the Gaia DR2 in studying many fine structures of the Hertzsprung-Russell diagram (HRD). Gaia allows us to present many different HRDs, depending in partic…
Gaia Data Release 1. Testing the parallaxes with local Cepheids and RR Lyrae stars
Gaia Collaboration, G. Clementini, L. Eyer +588
Parallaxes for 331 classical Cepheids, 31 Type II Cepheids and 364 RR Lyrae stars in common between Gaia and the Hipparcos and Tycho-2 catalogues are published in Gaia Data Release…
The disappearing act: A dusty wind eclipsing RW Aur
I. Bozhinova, A. Scholz, G. Costigan +8
RW Aur is a young binary star that experienced a deep dimming in 2010-11 in component A and a second even deeper dimming from summer 2014 to summer 2016. We present new unresolved…
Temperaments of young stars: Rapid mass-accretion rate changes in T Tauri and Herbig Ae stars
Gráinne Costigan, Jorick S. Vink, Aleks Scholz +2
Variability in emission lines is a characteristic feature in young stars and can be used as a tool to study the physics of the accretion process. Here we present a study of Hα vari…
Time Monitoring of Radio Jets and Magnetospheres in the Nearby Young Stellar Cluster R Coronae Australis
Hauyu Baobab Liu, Roberto Galván-Madrid, Jan Forbrich +9
We report JVLA 8-10 GHz (=3.0-3.7 cm) monitoring observations toward the YSO cluster R Coronae Australis (R\,CrA), taken in 2012, from March 15 to September 12. These observatio…
LAMP: The Long-term Accretion Monitoring Program of T Tauri stars in Chamaeleon-I
G. Costigan, A. Scholz, B. Stelzer +3
We present the results of a variability study of accreting young stellar objects in the Chameleon I star-forming region which is based on ~300 high resolution optical spectra from…
Disks, accretion and outflows of brown dwarfs
V. Joergens, G. Herczeg, Y. Liu +13
Characterization of the properties of young brown dwarfs are important to constraining the formation of objects at the extreme low-mass end of the IMF. While young brown dwarfs sha…
Magnetic activity and accretion on FU Tau A: Clues from variability
Aleks Scholz, Beate Stelzer, Grainne Costigan +5
FU Tau A is a young very low mass object in the Taurus star forming region which was previously found to have strong X-ray emission and to be anomalously bright for its spectral ty…