Eta Carinae: The physical structure of the outer ejecta and the strings
| dc.creator | Weis, Kerstin | |
| dc.date | 2002-08-28 | |
| dc.date.accessioned | 2026-07-07T02:04:49Z | |
| dc.date.available | 2026-07-07T02:04:49Z | |
| dc.description | The outer ejecta is part of the nebula around Eta Carinae. They are filamentary, shaped irregularly and larger than the Homunculus, the central bipolar nebula. While the Homuculus is mainly a reflection nebula, the outer ejecta is an emission structure. However, we showed with kinematic analysis that the outer ejecta (as the Homunculus) expands bi-directional despite of its complex morphology. Radial velocities in the outer ejecta reach up to 2000km/s and give rise to X-ray emission. An analysis showing the distribution of the soft X-ray emission and its comparison to the optical emitting gas is presented here. X-ray maxima are found in areas in which the expansion velocities are highest. The temperature of 0.65 keV determined with the CHANDRA/ACIS data and thermal equilibrium models indicates post-shock velocities of 750km/s, about what was found in the spectra. In addition analysis of the new HST-STIS data from the Strings--long, highly collimated structures in the outer ejecta--are presented. The data show that the electron density of the Strings is of the order of 10^4 cm^-3. The same value was detected for other structures in the outer ejecta. With this density String 1 has a mass of about 3 10^-4 M_sun and the total ejecta could be as massive as 0.5 M_sun. | |
| dc.description | 6 pages, 6 figures, presented at the ETA CARINA WORKSHOP, 10-13 July 2002, Mt. Rainier WA, see http://www.astro.washington.edu/balick/eta_conf/eta_talks_posters.html paper with images in FULL resolution at http://www.mpifr-bonn.mpg.de/staff/kweis/publications.html | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0208493 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0208493 | |
| dc.identifier | online proceedings: ETA CARINA WORKSHOP, 10-13 July 2002, Mt. Rainier WA | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/4909 | |
| dc.subject | Astrophysics | |
| dc.title | Eta Carinae: The physical structure of the outer ejecta and the strings | |
| dc.type | text |