A multisite photometric campaign on the pre-main-sequence d Scuti pulsator IP Persei

We present the results of a photometric multisite campaign on the d Scuti Pre-Main-Sequence star IP Per. Nine telescopes have been involved in the observations, with a total of about 190 h of observations over 38 nights. Present data confirms the multiperiodic nature of this star and leads to the identification of at least nine pulsational frequencies. Comparison with the predictions of linear non-adiabatic radial pulsation models allowed us to identify only five of the nine observed frequencies, and to constrain the position of IP Per in the HR diagram. The latter is in good agreement with the empirical determination of the stellar parameters obtained by Miroshnichenko et al. (2001, A&A, 377, 854). An initial interpretation of the observed frequencies using the Aarhus non-radial pulsation code suggests that three frequencies could be associated with non-radial (l = 2) modes. Finally, we present new evolutionary and pulsation models at lower metallicity (Z = 0.008) to take into account the possibility that IP Per is metal deficient, as indicated by Miroshnichenko et al. (2001, A&A, 377, 854). ESO 2006

GGSL in galaxy clusters: simulations and lens models

The dataset contains the snapshots and the subhalo catalogs of the cluster simulations used in the Science publication "An excess of small-scale gravitational lenses observed in galaxy clusters" by Meneghetti et al. (2020). It also contains the lens models (distributed as Lenstool parameter files) of the galaxy clusters used in the comparison to the simulations. More details about the simulations can be found in the papers by E. Rasia, et al. (Astrophys. J.l 813, L17, 2015) and S. Planelles, et al. (Mon. Not. R. Astron. Soc. 467, 3827, 2017). The lens models are discussed in the papers by P. Bergamini, et al. (Astron. Astrophys. 631, A130, 2019) and G. B. Caminha, et al. (Astron. Astrophys. 632, A36, 2019)

46 open clusters GaiaDR2 HR diagrams

VizieR online Data Catalogue associated with article published in journal Astronomy & Astrophysics with title 'Gaia Data Release 2: Observational Hertzsprung-Russell diagrams.' (bibcode: 2018A&A...616A..10G