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Luminous red novae :
Luminous red novae : Stellar mergers or giant eruptions?
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Pastorello, A. (author)
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Mason, E. (author)
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Taubenberger, S. (author)
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show more...
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Fraser, M. (author)
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Cortini, G. (author)
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Tomasella, L. (author)
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Botticella, M. T. (author)
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Elias-Rosa, N. (author)
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Kotak, R. (author)
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Smartt, S. J. (author)
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Benetti, S. (author)
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Cappellaro, E. (author)
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Turatto, M. (author)
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- Tartaglia, Leonardo (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Djorgovski, S. G. (author)
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Drake, A. J. (author)
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Berton, M. (author)
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Briganti, F. (author)
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Brimacombe, J. (author)
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Bufano, F. (author)
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Cai, Y.-Z. (author)
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Chen, S. (author)
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Christensen, E. J. (author)
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Ciabattari, F. (author)
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Congiu, E. (author)
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Dimai, A. (author)
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Inserra, C. (author)
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Kankare, E. (author)
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Magill, L. (author)
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Maguire, K. (author)
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Martinelli, F. (author)
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Morales-Garoffolo, A. (author)
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Ochner, P. (author)
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Pignata, G. (author)
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Reguitti, A. (author)
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- Sollerman, Jesper (author)
- Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Spiro, S. (author)
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Terreran, G. (author)
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Wright, D. E. (author)
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(creator_code:org_t)
- 2019-09-24
- 2019
- English.
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In: Astronomy and Astrophysics. - : EDP Sciences. - 0004-6361 .- 1432-0746. ; 630
- Related links:
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https://www.aanda.or...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
Close
- We present extensive datasets for a class of intermediate-luminosity optical transients known as luminous red novae. They show double-peaked light curves, with an initial rapid luminosity rise to a blue peak (at -13 to -15 mag), which is followed by a longer-duration red peak that sometimes is attenuated, resembling a plateau. The progenitors of three of them (NGC 4490-2011OT1, M 101-2015OT1, and SNhunt248), likely relatively massive blue to yellow stars, were also observed in a pre-eruptive stage when their luminosity was slowly increasing. Early spectra obtained during the first peak show a blue continuum with superposed prominent narrow Balmer lines, with P Cygni profiles. Lines of Fe II are also clearly observed, mostly in emission. During the second peak, the spectral continuum becomes much redder, H alpha is barely detected, and a forest of narrow metal lines is observed in absorption. Very late-time spectra (similar to 6 months after blue peak) show an extremely red spectral continuum, peaking in the infrared (IR) domain. H alpha is detected in pure emission at such late phases, along with broad absorption bands due to molecular overtones (such as TiO, VO). We discuss a few alternative scenarios for luminous red novae. Although major instabilities of single massive stars cannot be definitely ruled out, we favour a common envelope ejection in a close binary system, with possibly a final coalescence of the two stars. The similarity between luminous red novae and the outburst observed a few months before the explosion of the Type IIn SN 2011ht is also discussed.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- binaries: close
- stars: winds
- outflows
- stars: massive
- supernovae: general
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
To the university's database
- By the author/editor
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Pastorello, A.
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Mason, E.
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Taubenberger, S.
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Fraser, M.
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Cortini, G.
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Tomasella, L.
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show more...
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Botticella, M. T ...
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Elias-Rosa, N.
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Kotak, R.
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Smartt, S. J.
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Benetti, S.
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Cappellaro, E.
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Turatto, M.
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Tartaglia, Leona ...
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Djorgovski, S. G ...
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Drake, A. J.
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Berton, M.
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Briganti, F.
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Brimacombe, J.
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Bufano, F.
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Cai, Y.-Z.
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Chen, S.
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Christensen, E. ...
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Ciabattari, F.
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Congiu, E.
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Dimai, A.
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Inserra, C.
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Kankare, E.
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Magill, L.
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Maguire, K.
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Martinelli, F.
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Morales-Garoffol ...
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Ochner, P.
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Pignata, G.
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Reguitti, A.
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Sollerman, Jespe ...
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Spiro, S.
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Terreran, G.
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Wright, D. E.
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
- Articles in the publication
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Astronomy and As ...
- By the university
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Stockholm University