Bibcode
Rica, F. M.; Barrena, R.; Vázquez, G.; Henríquez, J. A.; Hernández, F.
Bibliographical reference
Monthly Notices of the Royal Astronomical Society, Volume 419, Issue 1, pp. 197-210.
Advertised on:
1
2012
Citations
12
Refereed citations
11
Description
We present relative positions of visual binaries observed in 2009 with
the FastCam 'lucky-imaging' camera mounted on the 1.5-m Carlos
Sánchez Telescope at the Observatorio del Teide. We obtained 424
CCD observations (averaged in 198 mean relative positions) of 157
binaries with angular separations in the range 0.14-15.40 arcsec, with a
median separation of 0.51 arcsec. For a given system, each CCD image
represents the sum of the best 10-25 per cent images from 1000-5000
short-exposure frames. Derived internal errors were 7 mas in ρ and
1?2 (9 mas) in θ. When comparing to systems with very well known
orbits, we find that the rms deviation in ρ residuals is 23 mas,
while the rms deviation in θ residuals is 0?73/ρ. We
confirmed 18 Hipparcos binaries and we report new companions to BVD 36 A
and J 621 B. For binaries with preliminary orbital parameters, the
relative radial velocity was estimated as well. We also present four new
revised orbits computed for LDS 873, BU 627 A-BC, BU 628 and HO 197 AB.
This work discusses the first results on visual binaries using the
FastCam lucky-imaging camera.
Related projects
![The photograph is a combination of visible and near-infrared light, the immense cluster is a rich mix of galaxy shapes. The brightest and largest galaxies in the cluster are the yellow-white, massive, elliptical galaxies containing many hundreds of billions of stars each. Spiral galaxies — like our Milky Way — have younger populations of stars and are bluish. NASA, ESA, and J. Lotz and the HFF Team (STScI) Abell 370 is located approximately 4 billion light-years away in the constellation Cetus, the Sea Monster](/sites/default/files/styles/crop_square_2_2_to_320px/public/images/project/Imagen%20Jairo.png?itok=-47xHY8B)
Galaxy Evolution in Clusters of Galaxies
Galaxies in the universe can be located in different environments, some of them are isolated or in low density regions and they are usually called field galaxies. The others can be located in galaxy associations, going from loose groups to clusters or even superclusters of galaxies. One of the foremost challenges of the modern Astrophysics is to
Jairo
Méndez Abreu