Search Publications
Estimating stellar parameters from spectra. I. Goodness-of-fit parameters and lack-of-fit test
Aerts, C.; Decin, L.; Molenberghs, G. +2 more
Estimating stellar parameters from spectrophotometric data is a key tool in the study of stellar structure and stellar evolution. Although many methods have been proposed to estimate stellar parameters from ultraviolet (UV), optical and infrared (IR) data using low, medium or high-resolution observational data of the target(s), only a few address …
The stellar content of the ring in NGC 660
Tikhonov, N. A.; Galazutdinova, O. A.; Hagen-Thorn, V. A. +2 more
We present the results of stellar photometry of the polar-ring galaxy
The corona of HD 199178 (V 1794 Cygni)
Gondoin, P.
HD 199178 (V 1794 Cygni), a chromospherically active late-type giant with a high X-ray luminosity, was observed by the XMM-Newton space observatory. Series of lines of highly ionized Fe and several Lyman lines of hydrogen-like ions are visible in the reflection grating spectra, most notably from O and Ne. Analysis results suggest a scenario where …
Fundamental parameters and evolutionary state of the Herbig Ae star candidate HD 35929
Miroshnichenko, A. S.; Bjorkman, K. S.; Gray, R. O. +2 more
HD 35929 is a pre-main-sequence Herbig Ae star candidate that exhibits emission in the Hα line and a weak IR excess. Although its luminosity type was estimated as IV from low-resolution spectroscopy, the insignificant HIPPARCOS parallax (0.88±0.93 mas) contradicted the low luminosity. To resolve this discrepancy, we took 3 high-resolution optical …
Photoionization model analysis of the planetary nebula Hu1-2
Pottasch, S. R.; Feibelman, W. A.; Hyung, S.
We have obtained high resolution optical spectra of the planetary nebula
Multicolour CCD measurements of nearby visual double stars. II
Strigachev, A.; Lampens, P.
We present accurate CCD astrometric and photometric data for 31 nearby visual double stars in the standard filters BVRI. The observations were collected with a 1.3-m telescope in 2001-2002 The results consist of relative astrometric positions (epoch, angular separation and position angle) and differential BVRI photometry of the components. Mean er…
ISOCAM observations of the L1551 star formation region
Prusti, T.; Perault, M.; Olofsson, G. +17 more
The results of a deep mid-IR ISOCAM survey of the
Magnetic activity in HD 111456, a young F5-6 main-sequence star
Freire Ferrero, R.; Frasca, A.; Catalano, S. +1 more
We present spectroscopic and photometric observations of the young F5-6 V field star
Celestial position of the companion of PSR J1740-5340
Bassa, C. G.; Stappers, B. W.
We present optical astrometry of archival ground and space based imaging of the companion to PSR J1740-5340. The optical position of the companion is significantly offset from the timing position of the pulsar. We briefly investigate the effects of this inconsistency on other timing parameters and compare our position with an improved position of …
The Pul-3 catalogue of 58483 stars in the Tycho-2 system
Bronnikova, N. M.; Khrutskaya, E. V.; Khovritchev, M. Yu.
A catalogue of positions and proper motions of 58483 stars (Pul-3) has been constructed at the Pulkovo observatory. The Pul-3 is based on the results of measurements of photographic plates with galaxies (Deutsch's plan). All plates were taken using the Pulkovo Normal Astrograph (the first epoch is in the 1950s and the second epoch is in the 1970s)…