NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-27 T00:26:08 PDT
Help | Comment | NED Home

For refcode 2014MNRAS.445..554F:
Retrieve 66 NED objects in this reference.
Please click here for ADS abstract

NED Abstract

Copyright by Royal Astronomical Society. 2014MNRAS.445..554F A sample of Type II-L supernovae Faran, T.; Poznanski, D.; Filippenko, A. V.; Chornock, R.; Foley, R. J.; Ganeshalingam, M.; Leonard, D. C.; Li, W.; Modjaz, M.; Serduke, F. J. D.; Silverman, J. M. Abstract. What are Type II-Linear supernovae (SNe II-L)? This class, which has been ill defined for decades, now receives significant attention - both theoretically, in order to understand what happens to stars in the ~15-25 M_sun_ range, and observationally, with two independent studies suggesting that they cannot be cleanly separated photometrically from the regular hydrogen-rich SNe II-P characterized by a marked plateau in their light curve. Here, we analyse the multiband light curves and extensive spectroscopic coverage of a sample of 35 SNe II and find that 11 of them could be SNe II-L. The spectra of these SNe are hydrogen deficient, typically have shallow Halpha absorption, may show indirect signs of helium via strong O I lambda7774 absorption, and have faster line velocities consistent with a thin hydrogen shell. The light curves can be mostly differentiated from those of the regular, hydrogen-rich SNe II-P by their steeper decline rates and higher luminosity, and we propose to define them based on their decline in the V band: SNe II-L decline by more than 0.5 mag from peak brightness by day 50 after explosion. Using our sample we provide template light curves for SNe II-L and II-P in four photometric bands. Key words: supernovae: general =========================================================================== 2015MNRAS.452.1201S Erratum: The critical radiation intensity for direct collapse black hole formation: dependence on the radiation spectral shape [2014, MNRAS, 445, 554] Sugimura, Kazuyuki; Omukai, Kazuyuki; Inoue, Akio K. Abstract. The paper was published in MNRAS, 445, 544 (2014). Fig. 6 was incorrect. The correct figure is shown {see Figure 6}. ===========================================================================
Retrieve 66 NED objects in this reference.
Please click here for ADS abstract

Back to NED Home