Detection of an inner torus in the Proto planetary Nebulae OH231.8+4.2
| dc.creator | Desmurs, J. -F. | |
| dc.creator | Contreras, C. Sanchez | |
| dc.creator | Bujarrabal, V. | |
| dc.creator | Colomer, F. | |
| dc.creator | Alcolea, J. | |
| dc.date | 2001-09-28 | |
| dc.date.accessioned | 2026-07-07T02:00:25Z | |
| dc.date.available | 2026-07-07T02:00:25Z | |
| dc.description | We performed the first VLBI observations of the SiO v=1 and v=2 J=1--0 masers in a Proto Planetary Nebula OH 231.8+4.2 (also known as the Rotten Egg nebula), at milliarcsecond resolution. Only the v=2 maser transition was detected. We detect several maser spots lying along a line which is almost perpendicular to the axis of symmetry of the Nebula. We find that all the emission is concentrated in an area of ~10 mas, indicating that the SiO masers are originated very close to the surface of the star. One of the two emission areas presents an elongated structure with a clear velocity gradient. The detected emission is consistent with a torus, or disk, in rotation with a velocity of ~6 km/s and with an infall velocity of ~10 km/s. | |
| dc.description | To appear in the proceedings of IAU Symposium #206: Cosmic Masers (Mangaratiba, Brazil; March 2001); 4 pages; Uses newpasp.sty | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0109543 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0109543 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/3420 | |
| dc.subject | Astrophysics | |
| dc.title | Detection of an inner torus in the Proto planetary Nebulae OH231.8+4.2 | |
| dc.type | text |