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

The bright, nearby, recently discovered supernova SN2010jl is a member of therare class of relatively luminous Type~IIn events. Here we report archival HSTobservations of its host galaxy UGC5189A taken roughly 10yr prior to explosion,as well as early-time optical spectra of the SN. The HST images reveal abright, blue point source at the position of the SN, with an absolute magnitudeof -12.0 in the F300W filter. If it is not just a chance alignment, the sourceat the SN position could be (1) a massive young (less than 6 Myr) star clusterin which the SN resided, (2) a quiescent, luminous blue star with an apparenttemperature around 14,000K, (3) a star caught during a bright outburst akin tothose of LBVs, or (4) a combination of option 1 and options 2 or 3. Although wecannot confidently choose between these possibilities with the present data,any of them imply that the progenitor of SN2010jl had an initial mass above30Msun. This reinforces mounting evidence that many SNe IIn result from verymassive stars, that massive stars can produce visible SNe without collapsingquietly to black holes, and that massive stars can retain their H envelopesuntil shortly before explosion. Standard stellar evolution models fail toaccount for these observed properties.

A Massive Progenitor of the Luminous Type IIn Supernova 2010jl