Near-Infrared observations of the type Ib Supernova SN2006jc: evidence of interactions with dust

TL;DR

This study presents near-infrared observations of SN2006jc, revealing a dust formation event caused by ejecta interacting with dense circumstellar material, supported by multi-wavelength data.

Contribution

First near-infrared monitoring of SN2006jc showing dust formation due to ejecta-CSM interaction, with multi-wavelength analysis confirming dust re-brightening.

Findings

NIR re-brightening peaking ~70 days after discovery

Color evolution indicating dust formation and subsequent clearing

Multi-wavelength data support dust formation from ejecta-CSM interaction

Abstract

In the framework of a program for the monitoring of Supernovae in the Near-Infrared (NIR) carried out by the Teramo, Rome and Pulkovo observatories with the AZT-24 telescope, we observed the Supernova SN2006jc in the J,H,K photometric bands during a period of 7 months, starting ~36 days after its discovery. Our observations evidence a NIR re-brightening, peaking ~70 days after discovery, along with a reddening of H-K and J-H colors until 120 days from discovery. After that date, J-H seems to evolve towards bluer colors. Our data, complemented by IR, optical, UV and X-ray observations found in the literature, show that the re-brightening is produced by hot dust surrounding the supernova, formed in the interaction of the ejecta with dense circumstellar matter.