Vertical Distribution and Kinematics of Protoplanetary Nebulae in the Galaxy
arXiv:1705.10946 · doi:10.1134/S1063773717070027
Abstract
The catalogue of protoplanetary nebulae by Vickers et al. has been supplemented with the line-of-sight velocities and proper motions of their central stars from the literature. Based on an exponential density distribution, we have estimated the vertical scale height from objects with an age less than 3 Gyr belonging to the Galactic thin disk (luminosities higher than 5000 Lo) to be h=146+/-15 pc, while from a sample of older objects (luminosities lower than 5000 Lo) it is h=568+/-42 pc. We have produced a list of 147 nebulae in which there are only the line-of-sight velocities for 55 nebulae, only the proper motions for 25 nebulae, and both line-of-sight velocities and proper motions for 67 nebulae. Based on this kinematic sample, we have estimated the Galactic rotation parameters and the residual velocity dispersions of protoplanetary nebulae as a function of their age. We have established that there is a good correlation between the kinematic properties of nebulae and their separation in luminosity proposed by Vickers. Most of the nebulae are shown to be involved in the Galactic rotation, with the circular rotation velocity at the solar distance being V_0=227+/-23 km/s. The following principal semiaxes of the residual velocity dispersion ellipsoid have been found: (sigma1, sigma2, sigma3) = (47, 41, 29) km/s from a sample of young protoplanetary nebulae (with luminosities higher than 5000 Lo), (sigma1, sigma2, sigma3) = (50, 38, 28) km/s from a sample of older protoplanetary nebulae (with luminosities of 4000 Lo or 3500 Lo), and (sigma1, sigma_2, sigma3) = (91, 49, 36) km/s from a sample of halo nebulae (with luminosities of 1700 Lo).
18 pages, 4 figures, 2 tabkes
References in corpus (15)
- The Gaia mission
- Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
- Gaia Data Release 1: Astrometry - one billion positions, two million proper motions and parallaxes
- The Tycho-Gaia astrometric solution. How to get 2.5 million parallaxes with less than one year of Gaia data
- A spectroscopic atlas of post-AGB stars and planetary nebulae selected from the IRAS Point Source Catalogue
- An evolutionary catalogue of Galactic post-AGB and related objects
- Properties of Star Clusters - II: Scale Height Evolution of Clusters
- Accelerated post-AGB evolution, initial-final mass relations, and the star-formation history of the Galactic bulge
- New light on Galactic post-asymptotic giant branch stars. I. First distance catalogue
- The spatio-kinematical structure and distance of the pre-planetary nebula IRAS 19134+2131
- Determination of Galactic Rotation Parameters and the Solar Galactocentric Distance Ro from 73 Masers
- A search for water maser emission toward obscured post-AGB star and planetary nebula candidates
- Spectral variability of the IR-source IRAS 01005+7910 optical component
- Peculiarities of the atmosphere and envelope of a post-AGB star, the optical counterpart of IRAS 23304+6347
- Evolutionary stage of the spectral variable BD+48 1220=IRAS 05040+4820