%0 Generic %1 whalen2013pairinstability %A Whalen, Daniel J. %A Even, Wesley %A Smidt, Joseph %A Heger, Alexander %A Hirschi, Raphael %A Yusof, Norhasliza %A Stiavelli, Massimo %A Fryer, Chris L. %A Chen, Ke-Jung %A Joggerst, Candace C. %D 2013 %K instability pair supernovae %T Pair-Instability Supernovae in the Local Universe %U http://arxiv.org/abs/1312.5360 %X The discovery of 150 - 300 M$_ødot$ stars in the Local Group and pair-instability supernova (PI SN) candidates at low redshifts has excited interest in this exotic explosion mechanism and poses serious challenges to current theories of galactic star formation. Realistic light curves for PI SNe at near-solar metallicities are key to identifying and properly interpreting these events as more are found. We have modeled the evolution and explosions of $Z \sim$ 0.1 - 0.4 $Z_ødot$ PI SN progenitors. These stars must be 150 - 500 M$_ødot$ at birth because they lose up to 80% of their mass to strong line-driven winds and explode as bare He cores. Their light curves and spectra are quite different from those of Population III pair-instability explosions, which therefore cannot be used as templates for low-redshift events. Our numerical models show that non-zero metallicity PI SNe are generally dimmer than Population III explosions but can still be detected at $z \sim$ 0.1 - 1 by the new supernova factories. They also reveal that pair-instability explosions can masquerade as dim, short-duration supernovae, and that under the right conditions they could be hidden in a wide variety of supernova classes. We also report for the first time that some PI SNe can create black holes with masses of $\sim$ 100 M$_ødot$.

@misc{whalen2013pairinstability, abstract = {The discovery of 150 - 300 M$_{\odot}$ stars in the Local Group and pair-instability supernova (PI SN) candidates at low redshifts has excited interest in this exotic explosion mechanism and poses serious challenges to current theories of galactic star formation. Realistic light curves for PI SNe at near-solar metallicities are key to identifying and properly interpreting these events as more are found. We have modeled the evolution and explosions of $Z \sim$ 0.1 - 0.4 $Z_{\odot}$ PI SN progenitors. These stars must be 150 - 500 M$_{\odot}$ at birth because they lose up to 80% of their mass to strong line-driven winds and explode as bare He cores. Their light curves and spectra are quite different from those of Population III pair-instability explosions, which therefore cannot be used as templates for low-redshift events. Our numerical models show that non-zero metallicity PI SNe are generally dimmer than Population III explosions but can still be detected at $z \sim$ 0.1 - 1 by the new supernova factories. They also reveal that pair-instability explosions can masquerade as dim, short-duration supernovae, and that under the right conditions they could be hidden in a wide variety of supernova classes. We also report for the first time that some PI SNe can create black holes with masses of $\sim$ 100 M$_{\odot}$.}, added-at = {2013-12-20T15:54:40.000+0100}, author = {Whalen, Daniel J. and Even, Wesley and Smidt, Joseph and Heger, Alexander and Hirschi, Raphael and Yusof, Norhasliza and Stiavelli, Massimo and Fryer, Chris L. and Chen, Ke-Jung and Joggerst, Candace C.}, biburl = {https://www.bibsonomy.org/bibtex/2d42a48113fddefd1a1b13ccbc82c5d7f/miki}, description = {[1312.5360] Pair-Instability Supernovae in the Local Universe}, interhash = {d582588225965583492c5543f78b4891}, intrahash = {d42a48113fddefd1a1b13ccbc82c5d7f}, keywords = {instability pair supernovae}, note = {cite arxiv:1312.5360Comment: 13 pages, 13 figures, submitted to ApJ}, timestamp = {2013-12-20T15:54:40.000+0100}, title = {Pair-Instability Supernovae in the Local Universe}, url = {http://arxiv.org/abs/1312.5360}, year = 2013 }