English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We present observations of SN 2020faa. This Type II supernova displays aluminous light curve that started to rebrighten from an initial decline. Weinvestigate this in relation to the famous supernova iPTF14hls, which receiveda lot of attention and multiple interpretations in the literature, howeverwhose nature and source of energy still remains unknown. We demonstrate thegreat similarity between SN 2020faa and iPTF14hls during the first 6 months,and use this comparison both to forecast the evolution of SN 2020faa and toreflect on the less well observed early evolution of iPTF14hls. We present andanalyse our observational data, consisting mainly of optical light curves fromthe Zwicky Transient Facility in the gri bands as well as a sequence of opticalspectra. We construct colour curves, a bolometric light curve, compareejecta-velocity and Black-body radius evolutions for the two supernovae, aswell as for more typical Type II supernovae. The light curves show a greatsimilarity with those of iPTF14hls over the first 6 months, in luminosity,timescale and colours. Also the spectral evolution of SN 2020faa is that of aType II supernova, although it probes earlier epochs than those available foriPTF14hls. The similar light curve behaviour is suggestive of SN 2020faa beinga new iPTF14hls. We present these observations now to advocate follow-upobservations, since most of the more striking evolution of supernova iPTF14hlscame later, with light curve undulations and a spectacular longevity. On theother hand, for SN 2020faa we have better constraints on the explosion epochthan we had for iPTF14hls, and we have been able to spectroscopically monitorit from earlier phases than was done for the more famous sibling.

Supernova SN 2020faa -- an iPTF14hls look-alike?