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A NITROGEN-ENRICHED NEBULA AROUND P-CYGNI

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. Green open access

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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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