-
QSO low-z Ly{alpha} absorbers
To study the nature of low-z Ly{alpha} absorbers in the spectra of QSOs, we have obtained high signal-to-noise ratio (S/N) UV spectra of H1821+643 (z_em_=0.297) and PG 1116+215... -
H{alpha} emission stars toward Bulge
This paper is dealing with the investigation of H-alpha emission stars towards the galactic bulge. In this important region 533 H-alpha emission stars have already been... -
Astrometry & radial velocity, Alpha Centauri system
Alpha Centauri A is the closest solar-type star to the Sun and offers the best opportunity to find and ultimately to characterize an Earth-sized planet located in its habitable... -
H{alpha} photometry in NGC 7020
The galaxy NGC7020 displays an exotic hexagonal ringlike central structure with conspicuous ansae located at two opposite vertices and a tenuous external ring populated by H ii... -
P Cyg H{alpha} squared visibility
High spatial resolution observations of the H{alpha}-emitting wind structure associated with the luminous blue variable star P Cygni were obtained with the Navy Prototype... -
VRIH{alpha} photometry in NGC 2264
We have performed deep wide-field CCD photometry of the young open cluster NGC 2264 to study the extent of star-forming regions (SFRs) and the shape of the initial mass... -
H{alpha} emission stars in LDN988
L988 is a large (~0.5{deg}x0.7{deg}) dark cloud complex at about 600pc that contains several bright pre-main-sequence objects (such as V1331 Cyg and LkH{alpha} 321), but this... -
H{alpha} imaging of irregular galaxies
We present the results of H{alpha} imaging of a large sample of irregular galaxies. Our sample includes 94 galaxies with morphological classifications of Im, 26 blue compact... -
KISS H{alpha} survey list 2
The KPNO International Spectroscopic Survey (KISS) is an objective-prism survey for extragalactic emission-line objects. It combines many of the features of previous slitless... -
Blue-H{alpha} objects in M33
For the purposes of a search for SS433 type objects, LBV stars and hypergiants in M33, we have carried out a photometry of blue stars in H{alpha} images of this galaxy. From... -
J-PLUS Ly{alpha}-emitting candidates
We present the photometric determination of the bright-end of the Ly{alpha} luminosity function (at L_Ly{alpha}>~10^43.5^erg/s) within four redshifts windows... -
alpha Persei, Pleiades and Praesepe clusters
Our scientific goal is to provide revised membership lists of the alpha Per, Pleiades, and Praesepe clusters exploiting the second data release of Gaia and produce... -
H{alpha} emitting sources around MWC758
MWC758 is a young star surrounded by a transitional disk. The disk shows an inner cavity and spiral arms that could be caused by the presence of protoplanets. Recently, a... -
alpha Vir RV and EW variations
Alpha Virginis (Spica) is a B-type binary system whose proximity and brightness allow detailed investigations of the internal structure and evolution of stars undergoing... -
FK Com spectra in H{alpha}
We study the connection between the chromospheric and photospheric behaviour of the active late-type star FK Comae. We use spot temperature modelling, light curve inversion... -
Carina Project VIII. {alpha}-element abundances
We have performed a new abundance analysis of Carina red giant (RG) stars from spectroscopic data collected with UVES (high spectral resolution) and FLAMES/GIRAFFE (high and... -
{alpha}-element abundances of Cepheid stars
We present new homogeneous measurements of Na, Al, and three alpha-elements (Mg, Si, Ca) for 75 Galactic Cepheids, complemented with Cepheid abundances available in the... -
H{alpha}3 V. Coma cluster
Neutral hydrogen represents the major observable baryonic constituent of galaxies that fuels the formation of stars through transformation of molecular hydrogen. The emission of... -
Extremely strong damped Lyman-{alpha} systems
We present a study of ~100 high redshift (z ~2-4) extremely strong damped Lyman-{alpha} systems (ESDLA, with N(HI)>=0.5x10^22^cm^-2^) detected in quasar spectra from the... -
H{alpha} spectra of {pi} Aqr
The work is aimed at studying the circumstellar disk of the bright classical binary Be star pi Aqr. We analysed variations of a double-peaked profile of the Halpha emission line...
