Search Publications
Fragments of harmony amid apparent chaos: A closer look at the X-ray quasi-periodic eruptions of the galaxy RX J1301.9+2747
Alexander, Kate D.; Miniutti, Giovanni; Kara, Erin +17 more
Quasi-periodic eruptions (QPEs) are an extreme X-ray variability phenomenon associated with low-mass (MBH < 107 M⊙) supermassive black holes (SMBHs). First discovered in the nucleus of the galaxy GSN 069, they have been so far securely detected in five other galaxies, including RX J1301.9+2747. When detected, th…
XMM-Newton - NuSTAR monitoring campaign of the Seyfert 1 galaxy IC 4329A
Paltani, S.; Tombesi, F.; Privon, G. C. +13 more
We present the results of a joint XMM-Newton and NuSTAR campaign on the active galactic nucleus (AGN) IC 4329A, consisting of 9 × 20 ks XMM-Newton observations, and 5 × 20 ks NuSTAR observations within nine days, performed in August 2021. Within each observation, the AGN is not very variable, and the fractional variability never exceeds 5%. Flux v…
High-resolution spectroscopy of the intermediate polar EX Hydrae. II. The inner disk radius
Beuermann, K.; Reinsch, K.
ExoplANETS-A: A virtual observatory database for host stars and planetary systems. The effect of XUV on planet atmospheres
Huélamo, N.; García, R. A.; Solano, E. +12 more
Context. ExoplANETS-A is an EU Horizon-2020 project with the primary objective of establishing new knowledge on exoplanet atmospheres. Intimately related to this topic is the study of the host stars' radiative properties in order to understand the environment in which exoplanets lie.
Aims: The aim of this work is to exploit archived data from…
Current and secular accretion rates of EX Hydrae
Beuermann, K.; Reinsch, K.
We report an observed accretion rate of Ṁ1 = (3.86 ± 0.60) × 10−11 M⊙ yr−1 for the white dwarf in the short-period, intermediate polar