The extreme Type I planetary nebula M2-52
| dc.creator | Pena, M. | |
| dc.creator | Medina, S. | |
| dc.date | 2002-03-05 | |
| dc.date.accessioned | 2026-07-07T02:03:00Z | |
| dc.date.available | 2026-07-07T02:03:00Z | |
| dc.description | High-resolution spectrophotometric data of the central zone of the Br-type planetary nebula M2-52 are presented. The nebula has a rich spectrum, with high and low excitation lines. The chemical composition derived from the spectra shows that He and N are very enhanced in M2-52. Thus, this object can be classified as an extreme Peimbert's Type I PN. The chemical composition of the ionized gas is: He/H =0.165 +/- 0.010, O/H = (2.6 +/- 0.5)E-04, N/O = 2.3 +/- 0.3, Ne/O = 0.37 +/-0.10, Ar/O = (9.2 +/- 2.0)E-03 and S/O > 2.0 E-03. The expansion velocity of the nebula is, on average, about 20 +/- 2 km/s, but the low ionization species (N+ and S+) seem to show systematically slightly lower expansion velocities (18 km/s) than O(++) and He+ which have v(exp) = 20 km/s while H+ and He(++) present v(exp) = 22 km/s. This behavior could indicate that the outer zones of the ionized gas are being decelerated by the molecular ring located around the central star. | |
| dc.description | 7 pages text, 1 figure. To appear in Rev. Mex. Astron. Astrof, vol 38, April 2002 | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0203059 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0203059 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/4243 | |
| dc.subject | Astrophysics | |
| dc.title | The extreme Type I planetary nebula M2-52 | |
| dc.type | text |