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Theta Vir and 109 Vir uvby photometry
Differential Stroemgren uvby photometric observations from the Four College Automated Photoelectric Telescope are used to examine the possible variability of the... -
Exocomets of beta Pictoris HARPS spectra
The young beta Pictoris system has been monitored with high-resolution optical spectrographs for decades. These observations have revealed strongly variable, stochastic... -
Milky Way through A stars
Despite their relatively high intrinsic brightness and the fact that they are more numerous than younger OB stars and kinematically colder than older red giants, A-type stars... -
phi Leo spectra
Variable red- and blue-shifted absorption features observed in the CaII K line towards the A-type shell star {phi} Leo have been suggested by us in a previous work to be likely... -
The International Deep Planet Survey. I.
Breakthrough direct detections of planetary companions orbiting A-type stars confirm the existence of massive planets at relatively large separations, but dedicated surveys are... -
Variability of A- and F-stars from Kepler
The Kepler spacecraft is providing time series of photometric data with micromagnitude precision for hundreds of A-F type stars. We present a first general characterization of... -
A and F stars abundances in the Hyades
Abundances of 15 chemical elements have been derived for 28 F and 16 A stars members of the Hyades open cluster in order to set constraints on self-consistent evolutionary... -
ubvy photometry of 4 magnetic CP stars
Differential Stroemgren uvby observations from the Four College Automated Photoelectric Telescope are presented for the magnetic Chemically Peculiar (mCP) stars HD 32633, Aur,... -
Effective temperature of metal-poor A-type stars
Effective temperatures (T_eff_) can be determined from (V-J)0, (V-H)0 and (V-K)0 colours that are derived from 2MASS magnitudes. This gives another way to estimate the T_eff_ of... -
Rotational velocities of A-type stars. I.
Within the scope of a Key Programme determining fundamental parameters of stars observed by HIPPARCOS, spectra of 525 B8 to F2-type stars brighter than V=8 have been collected... -
Catalogue of H line profiles of 235 B-F stars
There are given 1064 profiles of the hydrogen lines H{gamma} and H{delta} for 235 B,A,F-stars obtained at the Main Stellar Spectrograph of the 6-m telescope in 1978-1986 in the... -
uvby-{beta} photometry of A and F southern stars
Photometric color excesses and distances plus heliocentric coordinates are calculated for 3762 southern A and early-F stars. The present results, combined with those previously... -
Stellar parameters study with SED fit algo
Accurately measuring stellar parameters is a key goal to increase our understanding of the observable Universe. However, current methods are limited by many factors, in... -
Variable stars study with TESS
From sector 1-44 TESS observations, 19 new rapidly oscillating Ap (roAp) stars, 103 ostensibly non-peculiar stars with roAp-like frequencies, and 617 {delta} Scuti stars with... -
Catalogue of outflows in E+A galaxies
E+A galaxies are believed to be a short phase connecting major merger ultraluminous infrared galaxies (ULIRGs) with red and dead elliptical galaxies. Their optical spectrum... -
SI abundances of 8 A-B stars
A comprehensive model atom was developed for Si I-II-III using the most up-to-date atomic data available so far. Based on non-local thermodynamic equilibrium (NLTE) line... -
Rotationally variable A stars from TESS
Recently, high-precision optical 2-min cadence light curves obtained with TESS for targets located in the mission's defined first four sectors have been released. The majority... -
Rotation in A-F stars
Measurements of projected rotational velocities and the rotational profile of stars with spectral types A-F are presented. This work completes previous measurements by line... -
Small planets transiting A-type stars with TESS
The Kepler and K2 missions enabled robust calculations of planet occurrence rates around FGKM-type stars. However, these missions observed too few stars with earlier spectral... -
Possible planets around A stars
Kepler photometry of A stars shows that a considerable fraction (about 19 per cent) have a peculiar feature in the periodogram. This feature consists of a broad peak, thought to...
