PTF11qcj: First Discovery of a Radio Luminous Ibn Supernova

Details PTF11qcj: First Discovery of a Radio Luminous Ibn Supernova PTF11qcj: First Discovery of a Radio Luminous Ibn Supernova

Feb 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012sptz.prop80255c&link_type=abstract

Spitzer Proposal ID #80255

Physics

Scientific paper

The Palomar Transient Factory (PTF) recently discovered PTF11qcj, a supernova with a very rare spectroscopic signature, called '' Type Ibn''. Type Ibn SNe are thought to be hydrogen-free core-collapse supernovae that interact with a dense shell of Helium-rich circum-stellar material (CSM) - Before the discovery of PTF 11qcj, only 4 of these objects were known, the prototype, best-studied one being the famous SN 2006jc. The three most important observational properties of SN 2006jc were:(i) the presence of He emission lines in the optical spectra; (ii) an associated thermal X-ray emission; and (iii) the presence of an IR dust echo. We are currently carrying out an extensive optical (Keck and Palomar), radio (EVLA and CARMA), and X-ray (Chandra and Swift) monitoring campaign of PTF11qcj. In agreement with (i), our optical observations of PTF11qcj show the presence of Helium emission lines in its spectra, which are very rare. In agreement with (ii), our Chandra detection reveals the presence of an associated X-ray emission, with an X-ray luminosity about 3 times that of SN 2006jc. Finally, our radio observations are showing something quite unexpected: PTF11qcj is at least 100 times more luminous than SN 2006jc in radio, and represents the first discovery of a radio loud Ibn SN. Here we ask for two (1hr + 2hr) observations of PTF11qcj with Spitzer's IRAC, in search for the proxy (iii). The rarity of radio-loud SNe, and even more so of radio-loud Ibn SNe (only this one case is known), makes this a unique opportunity to study the physics of He-dominated CSM interaction. The fact that this interaction can be probed at the same time in IR, radio, X-ray, and optical, promises an exciting return from investing in the study of PTF 11qcj.

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