Radial velocities in the region of CR 135

Details Radial velocities in the region of CR 135 Radial velocities in the region of CR 135

Sep 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993pasp..105..926a&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 105, no. 691, p. 926-931.

Astronomy and Astrophysics

Astronomy

2

Astronomical Photometry, Cool Stars, Open Clusters, Variable Stars, Astronomical Catalogs, Milky Way Galaxy, Radial Velocity, Southern Hemisphere

Scientific paper

We give mean radial velocities of 63 stars belonging to a 2 deg x 2 deg field centered on Cr 135 in Puppis, where only a few radial velocities of bright stars are at present known. We obtained relative radial velocities which have been fitted to the IAU standard system of radial velocities by means of some stars with already known radial velocities. We present the histogram of the errors and a general radial-velocity diagram, as well as a discussion about the possible variable stars and the cluster membership. The histogram of the errors shows a maximum between E = 2.0 and E = 3.0 km/s for an average of six plates per star. The general radial-velocity diagram has a peak at about 20 km/s representing principally the field stars. The radial velocities of the five brightest stars and those of stars previously selected as probable cluster members lie in this peak. On the basis of photometric data, the physical reality of Cr 135 has been contested. Our results show that if, nevertheless, the cluster exists, its radial velocity is very close to that of field stars. Cr 135 could also belong to an old association or to a stellar group.

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