We present the study on continuous high-resolution spectroscopic observations of two long-period single-lined RS Canum Venaticorum (RS CVn) binary stars IM...
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PublicationMagnetic activities on two single-lined RS Canum Venaticorum binaries IM Pegasi and σ Geminorum
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PublicationMass Outflow and Chromospheric Activity of Red Giant Stars in Globular Clusters. II. M13 and M92
High-resolution spectra of 123 red giant stars in the globular cluster M13 and 64 red giant stars in M92 were obtained with Hectochelle at the MMT telescope...
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PublicationMass Outflow and Chromospheric Activity of Red Giant Stars in Globular Clusters.I. M15
High-resolution spectra of 110 selected red giant stars in the globular cluster M15 (NGC 7078) were obtained with Hectochelle at the MMT telescope in 2005 May...
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PublicationMass Outflow from Red Giant Stars in M13, M15, and M92
Chromospheric model calculations of the Hα line for selected red giant branch and asymptotic giant branch (AGB) stars in the globular clusters M13, M15, and M92...
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PublicationNon-LTE Inversion of Line Profiles
In this paper we address the problem of the non-LTE (NLTE) inversion of line profiles by means of a nonlinear least-squares minimization procedure combined with...
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PublicationNon-LTE Inversion of Stokes Profiles Induced by the Zeeman Effect
This paper presents a new diagnostic tool for the inference of the thermal, dynamic, and magnetic properties of the solar chromosphere. It consists of a non-LTE...
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PublicationObservation and modelling of main-sequence star chromospheres - XIX. FIES and FEROS observations of dM1 stars
We present 187 high-resolution spectra for 62 different M1 dwarfs from observations obtained with the FIbre-fed Echelle Spectrograph (FIES) on the Nordic...
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PublicationPolarisation and magnetic fields in cool stars and the Sun. A session in memory of Meir Semel
Astrophysical plasmas and magnetic fields are inextricably coupled to each other. But magnetic fields are elusive; they cannot be fully characterized with...
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PublicationRotation periods of late-type dwarf stars from time series high-resolution spectroscopy of chromospheric indicators
We determine rotation periods of a sample of 48 late F-type to mid-M dwarf stars using time series high-resolution spectroscopy of the Ca II H&K and H α...