SIMBAD references

2015A&A...581L...4K - Astronomy and Astrophysics, volume 581, L4-4 (2015/9-1)

On the triple peaks of SN Hunt 248 in NGC 5806.

KANKARE E., KOTAK R., PASTORELLO A., FRASER M., MATTILA S., SMARTT S.J., BRUCE A., CHAMBERS K.C., ELIAS-ROSA N., FLEWELLING H., FREMLING C., HARMANEN J., HUBER M., JERKSTRAND A., KANGAS T., KUNCARAYAKTI H., MAGEE M., MAGNIER E., POLSHAW J., SMITH K.W., SOLLERMAN J. and TOMASELLA L.

Abstract (from CDS):

We present our findings on a supernova (SN) impostor, SNHunt248, based on optical and near-IR data spanning ∼15yr before discovery, to ∼1yr post-discovery. The light curve displays three distinct peaks, the brightest of which is at MR ~-15.0mag. The post-discovery evolution is consistent with the ejecta from the outburst interacting with two distinct regions of circumstellar material. The 0.5-2.2µm spectral energy distribution at -740d is well-matched by a single 6700K blackbody with log(L/L)∼6.1. This temperature and luminosity support previous suggestions of a yellow hypergiant progenitor; however, we find it to be brighter than the brightest and most massive Galactic late-F to early-G spectral type hypergiants. Overall the historical light curve displays variability of up to ~±1mag. At current epochs (∼1yr post-outburst), the absolute magnitude (MR~-9mag) is just below the faintest observed historical absolute magnitude ∼10yr before discovery.

Abstract Copyright:

Journal keyword(s): stars: massive - stars: mass-loss - supernovae: general - supernovae: individual: SN Hunt 248

Simbad objects: 5

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2015A&A...581L...4K and select 'bookmark this link' or equivalent in the popup menu


2021.08.04-04:24:56

© Université de Strasbourg/CNRS

    • Contact