Evidence for a signature of the galactic bar in the solar neighbourhood
| dc.creator | Raboud, D. | |
| dc.creator | Grenon, M. | |
| dc.creator | Martinet, L. | |
| dc.creator | Fux, R. | |
| dc.creator | Udry, S. | |
| dc.date | 1998-02-20 | |
| dc.date | 1998-05-14 | |
| dc.date.accessioned | 2026-07-07T02:26:08Z | |
| dc.date.available | 2026-07-07T02:26:08Z | |
| dc.description | Using available kinematical data for a subsample of NLTT stars from the HIPPARCOS mission we confirm the existence of a previously reported local anomaly in the (u,v) plane: the mean motion u for old disc stars, with v < -30 km/s, is largely positive (+19 +/- 9 km/s w.r.t. the Galactic Center). With the use of the newest global self-consistent numerical models of our Galaxy, we show that a bar could be responsible for this observed velocity anomaly. A fraction of our stars have bar perturbed ``hot'' orbits, allowing them to erratically wander from inside the bar to regions outside the corotation, in particular through the solar neighbourhood. | |
| dc.description | Letter (4 pages, 6 figures). Revised version: modifications in the text and in figure 1. Accepted for publication in A&A Letters | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9802266 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9802266 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/12153 | |
| dc.subject | Astrophysics | |
| dc.title | Evidence for a signature of the galactic bar in the solar neighbourhood | |
| dc.type | text |