Ultra-bright optical transients are linked with type IC supernovae
| Autor: | C. G. Wynn-Williams, Tommy Grav, Christopher Waters, P. A. Price, Eugene A. Magnier, T. Flewelling, Morgan Fraser, T. Dombeck, Seppo Mattila, P. H. Rhoads, M. T. Botticella, D. A. Howell, David Young, Kate Maguire, Peter M. Onaka, Christopher W. Stubbs, Rubina Kotak, Robert H. Lupton, R. P. Kudritzki, David G. Monet, William S. Burgett, Mark Waterson, Erkki Kankare, Armin Rest, J. N. Heasley, Kuiyun Huang, Walter A. Siegmund, John Morgan, Stefano Valenti, L. Magill, Suvi Gezari, Andrea Pastorello, Nigel Metcalfe, John L. Tonry, K. W. Smith, Richard J. Wainscoat, K. C. Chambers, Nick Kaiser, Klaus W. Hodapp, Stephen J. Smartt, G. A. Luppino, Yuji Urata, Fabio Bresolin, W. Sweeney |
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| Rok vydání: | 2010 |
| Předmět: |
Physics
Absorption spectroscopy media_common.quotation_subject Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Astronomy and Astrophysics Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Redshift Spectral line Photometry (optics) Supernova Stars Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Sky Astrophysics::Solar and Stellar Astrophysics Texas Supernova Search Solar and Stellar Astrophysics (astro-ph.SR) Astrophysics::Galaxy Astrophysics media_common |
| Zdroj: | Astrophysical journal letters, 2010, Vol.724(1), pp.L16-L21 [Peer Reviewed Journal] Pastorello, A, Smartt, S J, Botticella, M T, Maguire, K, Fraser, M, Smith, K, Kotak, R, Magill, L, Valenti, S, Young, D R, Gezari, S, Bresolin, F, Kudritzki, R, Howell, D A, Rest, A, Metcalfe, N, Mattila, S, Kankare, E, Huang, K Y, Urata, Y, Burgett, W S, Chambers, K C, Dombeck, T, Flewelling, H, Grav, T, Heasley, J N, Hodapp, K W, Kaiser, N, Luppino, G A, Lupton, R H, Magnier, E A, Monet, D G, Morgan, J S, Onaka, P M, Price, P A, Rhoads, P H, Siegmund, W A, Stubbs, C W, Sweeney, W E, Tonry, J L, Wainscoat, R J, Waterson, M F, Waters, C & Wynn-Williams, C G 2010, ' Ultra-bright Optical Transients are Linked with Type Ic Supernovae ', The Astrophysical Journal Letters, vol. 724, no. 1, pp. L16-L21 . https://doi.org/10.1088/2041-8205/724/1/L16 |
| Popis: | Recent searches by unbiased, wide-field surveys have uncovered a group of extremely luminous optical transients. The initial discoveries of SN 2005ap by the Texas Supernova Search and SCP-06F6 in a deep Hubble pencil beam survey were followed by the Palomar Transient Factory confirmation of host redshifts for other similar transients. The transients share the common properties of high optical luminosities (peak magnitudes ~ -21 to -23), blue colors, and a lack of H or He spectral features. The physical mechanism that produces the luminosity is uncertain, with suggestions ranging from jet-driven explosion to pulsational pair-instability. Here we report the most detailed photometric and spectral coverage of an ultra-bright transient (SN 2010gx) detected in the Pan-STARRS 1 sky survey. In common with other transients in this family, early-time spectra show a blue continuum, and prominent broad absorption lines of O II. However, about 25d after discovery, the spectra developed type Ic supernova features, showing the characteristic broad Fe II and Si II absorption lines. Detailed, post-maximum follow-up may show that all SN 2005ap and SCP-06F6 type transients are linked to supernovae Ic. This poses problems in understanding the physics of the explosions: there is no indication from late-time photometry that the luminosity is powered by 56Ni, the broad lightcurves suggest very large ejected masses, and the slow spectral evolution is quite different from typical Ic timescales. The nature of the progenitor stars and the origin of the luminosity are intriguing and open questions. 16 pages, 4 figures, 1 table. Accepted for publication in the Astrophysical Journal Letters on September 9 |
| Databáze: | OpenAIRE |
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