19 citations · 98 across the 9 of their papers we have counts for
7 papers · 1 filter
The enigmatic dance of the HD 189733A system: Does the planet accrete onto the star?
Salvatore Colombo, Ignazio Pillitteri, Antonino Petralia +2
Several studies suggest that the emission properties of a star can be affected by its interaction with a nearby planet. However, the actual observability of these effects remains a…
The X-ray activity of F stars with hot Jupiters: KELT-24 versus WASP-18
I. Pillitteri, S. Colombo, G. Micela +1
X-rays emitted by the coronae of solar-type stars are a feature present in up to late-A types during the main sequence phase. F stars, either with or without hot Jupiters, are usua…
X-ray flares of the young planet host DS Tuc A
I. Pillitteri, C. Argiroffi, A. Maggio +5
Abridged. We observed the 40 Myr old star DS Tuc A with XMM-Newton and recorded two X-ray bright flares, with the second event occurring about 12 ks after the first one. Their dura…
Short term variability of DS Tuc A observed with TESS
Salvatore Colombo, Antonio Petralia, Giuseppina Micela
Impulsive short term variations occur in all kinds of solar-type stars. They are the results of complex phenomena such as the stellar magnetic field reconnection, low-level variabi…
Effects of Radiation in Accretion Regions of Classical T Tauri Stars: Pre-heating of accretion column in non-LTE regime
Salvatore Colombo, Laurent Ibgui, Salvatore Orlando +8
Models and observations indicate that the impact of matter accreting onto the surface of young stars produces regions at the base of accretion columns, in which optically thin and…
A new view of the corona of classical T Tauri stars: Effects of flaring activity in circumstellar disks
Salvatore Colombo, Salvatore Orlando, Giovanni Peres +5
Classical T Tauri stars (CTTSs) are young low-mass stellar objects accreting mass from their circumstellar disks. They are characterized by high levels of coronal activity as revea…
Impacts of fragmented accretion streams onto Classical T Tauri Stars: UV and X-ray emission lines
Salvatore Colombo, Salvatore Orlando, Giovanni Peres +2
Context. The accretion process in Classical T Tauri Stars (CTTSs) can be studied through the analysis of some UV and X-ray emission lines which trace hot gas flows and act as diagn…