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Two Transitional Type Ia Supernovae Located In The Fornax Cluster Member Ngc 1404

Title: Two Transitional Type Ia Supernovae Located In The Fornax Cluster Member Ngc 1404: Sn 2007on And Sn 2011iv.
Name(s): Gall, C., author
Stritzinger, M. D., author
Ashall, C., author
Baron, E., author
Burns, C. R., author
Hoeflich, P., author
Hsiao, E. Y., author
Mazzali, P. A., author
Phillips, M. M., author
Filippenko, A. V., author
Anderson, J. P., author
Benetti, S., author
Brown, P. J., author
Campillay, A., author
Challis, P., author
Contreras, C., author
Elias de la Rosa, N., author
Folatelli, G., author
Foley, R. J., author
Fraser, M., author
Holmbo, S., author
Marion, G. H., author
Morrell, N., author
Pan, Y.-C., author
Pignata, G., author
Suntzeff, N. B., author
Taddia, F., author
Torres Robledo, S., author
Valenti, S., author
Type of Resource: text
Genre: Journal Article
Journal Article
Date Issued: 2018-03-27
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: We present an analysis of ultraviolet (UV) to near-infrared observations of the fast-declining Type Ia supernovae (SNe Ia) 2007on and 2011iv, hosted by the Fornax cluster member NGC 1404. The B-band light curves of SN 2007on and SN 2011iv are characterised by Delta m(15)(B) decline-rate values of 1.96 mag and 1.77 mag, respectively. Although they have similar decline rates, their peak B-and H-band magnitudes di ff er by similar to 0.60 mag and similar to 0.35 mag, respectively. After correcting for the luminosity vs. decline rate and the luminosity vs. colour relations, the peak B-band and H-band light curves provide distances that di ff er by similar to 14% and similar to 9%, respectively. These findings serve as a cautionary tale for the use of transitional SNe Ia located in early-type hosts in the quest to measure cosmological parameters. Interestingly, even though SN 2011iv is brighter and bluer at early times, by three weeks past maximum and extending over several months, its B - V colour is 0.12 mag redder than that of SN 2007on. To reconcile this unusual behaviour, we turn to guidance from a suite of spherical one-dimensional Chandrasekhar-mass delayed-detonation explosion models. In this context, Ni-56 production depends on both the so-called transition density and the central density of the progenitor white dwarf. To first order, the transition density drives the luminosity-width relation, while the central density is an important second-order parameter. Within this context, the di ff erences in the B - V colour evolution along the Lira regime suggest that the progenitor of SN 2011iv had a higher central density than SN 2007on.
Identifier: FSU_libsubv1_wos_000428423300002 (IID), 10.1051/0004-6361/201730886 (DOI)
Keywords: supernovae: general, thermonuclear supernovae, dust, extinction, asymmetric explosion, chandrasekhar-mass models, light curves, accreting white-dwarfs, delayed-detonation model, luminosity indicators, near-infrared observations, supernovae: individual: SN 2011iv, supernovae: individual: SN 2007on, surface brightness fluctuations, ultraviolet-spectra
Publication Note: The publisher's version of record is available at
Persistent Link to This Record:
Owner Institution: FSU
Is Part Of: Astronomy & Astrophysics.
Issue: vol. 611

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Gall, C., Stritzinger, M. D., Ashall, C., Baron, E., Burns, C. R., Hoeflich, P., … Valenti, S. (2018). Two Transitional Type Ia Supernovae Located In The Fornax Cluster Member Ngc 1404: Sn 2007on And Sn 2011iv. Astronomy & Astrophysics. Retrieved from