The nature of supernovae 2010O and 2010P in Arp 299 - II. Radio emission

• We report radio observations of two stripped-envelope supernovae (SNe), 2010O and 2010P, which exploded within a few days of each other in the luminous infrared galaxy Arp 299. Whilst SN 2010O remains undetected at radio frequencies, SN 2010P was detected (with an astrometric accuracy better than 1 milli arcsec in position) in its optically thin phase in epochs ranging from similar to 1 to similar to 3 yr after its explosion date, indicating a very slow radio evolution and a strong interaction of the SN ejecta with the circumstellar medium. Our late-time radio observations towards SN 2010P probe the dense circumstellar envelope of this SN, and imply M [M-circle dot yr(-1)]/upsilon(wind) [10 km s(-1)] = (3.0 - 5.1) x 10(-5), with a 5 GHz peak luminosity of similar to 1.2 x 10(27) erg s(- 1) Hz(- 1) on day similar to 464 after explosion. This is consistent with a Type IIb classification for SN 2010P, making it the most distant and most slowly evolving Type IIb radio SN detected to date.

Ämnesord

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)

NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

Nyckelord

PROGENITORS

supernovae: individual: SN 2010P

radio continuum: galaxies

V267

REVEAL

P551

EXPLOSION

supernovae: individual: SN 2010O

SN 2011DH

EVOLUTION

1983

X-RAY-EMISSION

ASTROPHYSICAL JOURNAL

EVALIER RA

ASTROPHYSICAL JOURNAL

supernovae: general

1982

HRZ RD

MODULATIONS

P302

DISCOVERY

LUMINOUS INFRARED GALAXY

LIGHT-CURVES

galaxies: starburst

galaxies: individual: Arp 299

V259

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