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http://hdl.handle.net/2248/6682
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DC Field | Value | Language |
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dc.contributor.author | Kameswara Rao, N | - |
dc.contributor.author | Lambert, David L | - |
dc.date.accessioned | 2020-11-10T01:38:31Z | - |
dc.date.available | 2020-11-10T01:38:31Z | - |
dc.date.issued | 2012-08-30 | - |
dc.identifier.citation | Manchado, A., Stanghellini, L & Sch¨onberner,D. eds. Planetary Nebulae: An Eye to the Future, Proceedings IAU Symposium No. 283, August 30 2012, pp. 476-477 | en |
dc.identifier.issn | 1743-9221 | - |
dc.identifier.uri | http://prints.iiap.res.in/handle/2248/6682 | - |
dc.description | Restricted Access | en |
dc.description.abstract | The star R Corona Borealis (R CrB) shows forbidden lines of [O II], [N II], and [S II] during the deep minimum when the star is fainter by about 8 to 9 magnitudes from normal brightness, suggesting the presence of nebular material around it. We present low and high spectral resolution observations of these lines during the ongoing deep minimum of R CrB, which started in July 2007. These emission lines show double peaks with a separation of about 170 km/s. The line ratios of [S II] and [O II] suggest an electron density of about 100 cm−3. We discuss the physical conditions and possible origins of this low density gas. These forbidden lines have also been seen in other R Coronae Borealis stars during their deep light minima and this is a general characteristic of these stars, which might have some relevance to their origins. | en |
dc.language.iso | en | en |
dc.publisher | International Astronomical Union | en |
dc.relation.ispartofseries | International Astronomical Union Symposium;283 | - |
dc.relation.uri | http://dx.doi.org/10.1017/S1743921312012008 | en |
dc.rights | © International Astronomical Union | en |
dc.subject | Stars: general | en |
dc.title | Nebula around R Corona Borealis | en |
dc.type | Article | en |
Appears in Collections: | IIAP Publications |
Files in This Item:
File | Description | Size | Format | |
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Nebula around R Corona Borealis.pdf | 138.22 kB | Adobe PDF | View/Open |
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