Context. Understanding stellar activity in M dwarfs is fundamental to improving our knowledge of the physics of stellar atmospheres and for planet search programmes. High levels of stellar activity (also frequently associated with flare events) can cause additional variations in the stellar emission that contaminate the signal induced by a planet and that need to be corrected. The study of activity indicators in active stars can improve our capability of modelling the signal generated by magnetic activity. Aims: In this work we present measurements of activity indicators at visible wavelength for a star with a high activity level, AD Leonis, observed with HARPS in 2006, and HARPS-N in 2018. Our aim is to understand the behaviour of stellar...
Context. Stellar activity poses one of the main obstacles for the detection and characterisation of ...
Context.The main chromospheric activity indicator is the S index, which is the ratio of the flux in ...
Context. The Calar Alto high-Resolution search for M dwarfs with Exo- earths with Near-infrared and ...
Context. Understanding stellar activity in M dwarfs is fundamental to improving our knowledge of the...
Context. Understanding stellar activity in M dwarfs is fundamental to improving our knowledge of the...
International audienceContext. The search for extra-solar planets similar to Earth is becoming a rea...
We performed a statistical study of magnetic activities of M-type stars by combining the spectra of ...
International audienceContext. Atmospheric magnetic fields in stars with convective envelopes heat s...
Despite stellar magnetic activity being present in most cool stars, its effects on spectroscopic obs...
Spectropolarimetric data allow for simultaneous monitoring of stellar chromospheric log R'HK activit...
Context. The search for extra-solar planets similar to Earth is becoming a reality, but as the level...
We present a homogeneous study of chromospheric and coronal flux–flux relationships using a sample o...
We present the results from a spectroscopic study of 1080 nearby active M dwarfs, selected by correl...
Context. Stellar activity poses one of the main obstacles for the detection and characterisation of ...
We present UVES/VLT observations of the nearby flare star CN Leo covering the Wing-Ford FeH band nea...
Context. Stellar activity poses one of the main obstacles for the detection and characterisation of ...
Context.The main chromospheric activity indicator is the S index, which is the ratio of the flux in ...
Context. The Calar Alto high-Resolution search for M dwarfs with Exo- earths with Near-infrared and ...
Context. Understanding stellar activity in M dwarfs is fundamental to improving our knowledge of the...
Context. Understanding stellar activity in M dwarfs is fundamental to improving our knowledge of the...
International audienceContext. The search for extra-solar planets similar to Earth is becoming a rea...
We performed a statistical study of magnetic activities of M-type stars by combining the spectra of ...
International audienceContext. Atmospheric magnetic fields in stars with convective envelopes heat s...
Despite stellar magnetic activity being present in most cool stars, its effects on spectroscopic obs...
Spectropolarimetric data allow for simultaneous monitoring of stellar chromospheric log R'HK activit...
Context. The search for extra-solar planets similar to Earth is becoming a reality, but as the level...
We present a homogeneous study of chromospheric and coronal flux–flux relationships using a sample o...
We present the results from a spectroscopic study of 1080 nearby active M dwarfs, selected by correl...
Context. Stellar activity poses one of the main obstacles for the detection and characterisation of ...
We present UVES/VLT observations of the nearby flare star CN Leo covering the Wing-Ford FeH band nea...
Context. Stellar activity poses one of the main obstacles for the detection and characterisation of ...
Context.The main chromospheric activity indicator is the S index, which is the ratio of the flux in ...
Context. The Calar Alto high-Resolution search for M dwarfs with Exo- earths with Near-infrared and ...