JOHNSON, DRH;
BARLOW, MJ;
DREW, JE;
BRINKS, E;
(1992)
A NITROGEN-ENRICHED NEBULA AROUND P-CYGNI.
Monthly Notices of the Royal Astronomical Society
, 255
(2)
pp. 261-266.
10.1093/mnras/255.2.261.
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Abstract
We have detected extended nebular emission in [S II]λλ6716,6731, [N II] λ6584,6584andHα on a long-slit spectrum offset by 9 arcsec from P Cyg. Anomalously strong [Ni II]λ6666.8 emission was also detected. The [S II] doublet ratio yields an electron density of 600 cm–3. The [N II] and [S II] lines have been used to derive an N/S ratio which is insensitive to the adopted value of electron temperature. The N/S ratio is 33 ± 5 by number, five times higher than solar, implying that the material has undergone CN-cycle processing which has converted most of the original carbon into nitrogen.
| Type: | Article |
|---|---|
| Title: | A NITROGEN-ENRICHED NEBULA AROUND P-CYGNI |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1093/mnras/255.2.261 |
| Publisher version: | https://doi.org/10.1093/mnras/255.2.261 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Science & Technology, Physical Sciences, Astronomy & Astrophysics, LARGE MAGELLANIC CLOUD, CIRCUMSTELLAR SHELLS, EMISSION, STARS, SPECTROSCOPY, CARINAE, WIND |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10096204 |
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