2010A&A...516A..27B


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.06CEST20:05:24

2010A&A...516A..27B - Astronomy and Astrophysics, volume 516, A27-27 (2010/6-2)

VLBI observations of SN2008iz. I. Expansion velocity and limits on anisotropic expansion.

BRUNTHALER A., MARTI-VIDAL I., MENTEN K.M., REID M.J., HENKEL C., BOWER G.C., FALCKE H., FENG H., KAARET P., BUTLER N.R., MORGAN A.N. and WEISS A.

Abstract (from CDS):

We present observations of the recently discovered supernova 2008iz in M 82 with the VLBI High Sensitivity Array at 22GHz, the Very Large Array at frequencies of 1.4, 4.8, 8.4, 22 and 43GHz, and the Chandra X-ray observatory. The supernova was clearly detected in two VLBI images separated by 11 months. The source shows a ring-like morphology and expands with a velocity of ∼23000km/s. The most likely explosion date is in mid-February 2008. The measured expansion speed is a factor of ∼2 higher than expected under the assumption that synchrotron self-absorption dominates the light curve at the peak, indicating that this absorption mechanism may not be important for the radio emission. We find no evidence for an asymmetric explosion. The VLA spectrum shows a broken power law, indicating that the source was still optically thick at 1.4GHz in April 2009. Finally, we report upper limits on the X-ray emission from SN2008iz and a second radio transient recently discovered by MERLIN observations.

Abstract Copyright:

Journal keyword(s): stars: supernovae: general - stars: supernovae: individual: SN2008iz - radio continuum: general - galaxies: individual: M 82

CDS comments: Paragraph 2.1 Background quasar 1004+6936 not identified.

Simbad objects: 17

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Number of rows : 17

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 3C 48 QSO 01 37 41.2995845985 +33 09 35.079126038   16.62 16.20     ~ 2496 2
2 SN 1986J SN* 02 22 31.33 +42 19 56.4   18.4 18.4     SNII 306 1
3 SN 1987A SN* 05 35 28.020 -69 16 11.07           SNIIpec 4484 2
4 7C 055201.39+394824.00 QSO 05 55 30.80561150 +39 48 49.1649664     18.0 17.5   ~ 466 2
5 2MASS J09482247+6848352 Sy1 09 48 22.4592317438 +68 48 35.231732303           ~ 10 1
6 4C 66.09 AGN 09 49 12.16518 +66 14 59.5874   21.6 21.6     ~ 50 1
7 SN 1993J SN* 09 55 24.77476 +69 01 13.7026   10.8 12.0     SNIIb 1253 1
8 M 81 Sy2 09 55 33.17306143 +69 03 55.0609270   7.89 6.94     ~ 3962 5
9 SN 2008iz SN* 09 55 51.55 +69 40 45.8           SNII: 49 1
10 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5332 6
11 NAME 44.0+59.5 SNR 09 55 52.72 +69 40 45.8           ~ 43 1
12 [UPA84] 45.2+61 SNR 09 55 53.88 +69 40 47.4 20.412 20.009 19.315   18.763 ~ 26 0
13 6C 104451+715930 QSO 10 48 27.6207767205 +71 43 35.941655031     19.0 17.49   ~ 184 1
14 SN 1979C SN* 12 22 58.58 +15 47 52.7   11.6       SNIIL 547 1
15 SN 2008ax SN* 12 30 40.80 +41 38 16.1   23.6 23.5 14.1 22.6 SNIIb 207 1
16 SN 1995N SN* 14 49 28.29 -10 10 14.0     17.5     SNIIn 130 1
17 SN 2004et SN* 20 35 25.33 +60 07 17.7   12.88       SNIIP 403 1

    Equat.    Gal    SGal    Ecl

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2020.07.06-20:05:24

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