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The Short-term Stability of a Simulated Differential Astrometric Reference Frame in the Gaia Era
Sozzetti, Alessandro; Abbas, Ummi; Bucciarelli, Beatrice +5 more
We use methods of differential astrometry to construct a small field inertial reference frame stable at the micro-arcsecond level. Such a high level of astrometric precision can be expected with the end-of-mission standard errors to be achieved with the Gaia space satellite using global astrometry. We harness Gaia measurements of field angles and …
Mass Outflow from Cool Giants in Symbiotic Stars
Shagatova, Natalia
Fundamental Parameters of the Eclipsing Binary TU Canis Majoris
Mennickent, R. E.; Garcés L., J.; Zharikov, S.
We present a spectroscopic and photometric study of the eclipsing binary TU Canis Majoris aimed to obtain their fundamental stellar parameters and evolutionary stage. Our results indicate that the masses, radii, temperatures, and luminosities for the primary and secondary stars are: {M}1=1.761+/- 0.012 {M}⊙ , {M}2=…
Photometric Strömgren-Hβ Quantification for O and B Stars of Luminosity Class V
Paunzen, Ernst; Kaltcheva, Nadia; Golev, Valeri
In any photometric system, the relationship between the spectral type and the intrinsic colors is fundamental for the photometric stellar classification and for a reliable derivation of stellar parameters. Such relationships are being constantly verified and improved based on larger and better samples. The capability of the Strömgren-Hβ photometry…