Investigation of Negative K-Effect Using the Osaca Catalogue

Details Investigation of Negative K-Effect Using the Osaca Catalogue Investigation of Negative K-Effect Using the Osaca Catalogue

2006-08-12

arxiv.org/abs/astro-ph/0608266v1

Astronomical and Astrophysical Transactions, Vol. 25, No. 2, 2006

Astronomy and Astrophysics

Astrophysics

3 pages

Scientific paper

10.1080/10556790600893104

We created and are constantly updating the Orion Spiral Arm CAtalogue (OSACA) for stars with known coordinates, parallaxes, proper motions and radial velocities. It is shown that there is an effect of contraction appearing in motion of giants of A0--A5 spectral classes which attains a value of K=-13+-2 km/s/kpc. We try to link this effect to the periodic structure of residual velocity field of stars in the solar neighborhood, which is caused by spiral density waves.

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