2012A&A...543A..72R


Query : 2012A&A...543A..72R

2012A&A...543A..72R - Astronomy and Astrophysics, volume 543A, 72-72 (2012/7-1)

e-MERLIN and VLBI observations of the luminous infrared galaxy IC 883: a nuclear starburst and an AGN candidate revealed.

ROMERO-CANIZALES C., PEREZ-TORRES M.A., ALBERDI A., ARGO M.K., BESWICK R.J., KANKARE E., BATEJAT F., EFSTATHIOU A., MATTILA S., CONWAY J.E., GARRINGTON S.T., MUXLOW T.W.B., RYDER S.D. and VAEISAENEN P.

Abstract (from CDS):

The high star formation rates of luminous infrared galaxies (LIRGs) make them ideal places for core-collapse supernova (CCSN) searches. Massive star formation can often be found in coexistence with an active galactic nucleus (AGN), contributing jointly to the energy source of LIRGs. At radio frequencies, where light is unaffected by dust extinction, it is possible to detect compact components within the innermost LIRG nuclear regions, such as SNe and SN remnants, as well as AGN buried deep in the LIRG nuclei. Our study of the LIRG IC883 aims at: (i) investigating the parsec-scale radio structure of the (circum-)nuclear regions of IC883; (ii) detecting at radio frequencies the two recently reported circumnuclear SNe 2010cu and 2011hi, which were discovered by near-IR (NIR) adaptive optics observations of IC883; and (iii) further investigating the nature of SN2011hi at NIR wavelengths. We used the electronic European very long baseline interferometry (VLBI) Network (e-EVN) at 5GHz, and the electronic Multi-Element Remotely Linked Interferometer Network (e-MERLIN) at 6.9GHz, to observe contemporaneously the LIRG IC883 at high angular-resolution (from tens to hundreds of milliarcsec) and with high sensitivity (<70µJy), complemented by archival VLBI data at 5GHz and 8.4GHz. We also used the Gemini North telescope to obtain late-time JHK photometry for SN2011hi. The circumnuclear regions traced by e-MERLIN at 6.9GHz have an extension of ∼1kpc, at a position angle of 130°, and show a striking double-sided structure, which very likely corresponds to a warped rotating ring, in agreement with previous studies. Our e-EVN observations at 5GHz and complementary archival VLBI data at 5GHz and 8.4GHz, reveal various milliarcsec compact components in the nucleus of IC883. A single compact source, an AGN candidate, dominates the emission at both nuclear and circumnuclear scales, as imaged with the e-EVN and e-MERLIN, respectively. The other milliarcsec components are strongly indicative of ongoing nuclear CCSN activity. Our e-EVN observations also provided upper limits to the radio luminosity of the two SNe in IC883 recently discovered at NIR wavelengths. We refine the classification of SN2011hi as a Type IIP SN according to our latest epoch of Gemini North observations acquired in 2012, in agreement with a low-luminosity radio SN nature. We estimate a CCSN rate lower limit of 1.1–0.6+1.3yr–1 for the entire galaxy, based on three nuclear radio SNe and the circumnuclear SNe 2010cu and 2011hi.

Abstract Copyright:

Journal keyword(s): galaxies: starburst - galaxies: individual: IC 883 - radio lines: stars - radiation mechanisms: non-thermal

Nomenclature: Fig.1, fig.2, Table 2 : [RPA2012] AN, [RPA2012] ANa, N=9

Simbad objects: 27

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Number of rows : 27
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 SN 1999em SN* 04 41 27.04 -02 51 45.2   13.79 13.7     SNIIP 612 1
2 7C 055201.39+394824.00 QSO 05 55 30.80561150 +39 48 49.1649664     18.0 17.5   ~ 482 2
3 2MASS J07371703+6535579 HXB 07 37 17.0439241104 +65 35 57.815731387           SNIIP 248 1
4 SN 2008iz SN* 09 55 51.55 +69 40 45.8           SNII: 53 1
5 M 82 IG 09 55 52.430 +69 40 46.93 9.61 9.30 8.41     ~ 5502 6
6 NGC 3690 IG 11 28 31.326 +58 33 41.80   13.19 12.86     ~ 913 4
7 Ton 599 QSO 11 59 31.83390975 +29 14 43.8268741   14.80 14.41 17.652 13.39 ~ 828 1
8 7C 1308+3236 BLL 13 10 28.66387 +32 20 43.7831   15.61 15.24 17.91   ~ 776 1
9 7C 1315+3441 QSO 13 17 36.4941820 +34 25 15.932445   18.92 18.62 19.03   ~ 138 1
10 [RPA2012] B2b Rad 13 20 35.281 +34 08 23.05           ~ 2 0
11 [RPA2012] B1b Rad 13 20 35.304 +34 08 22.63           ~ 2 0
12 [RPA2012] A3 Rad 13 20 35.3176 +34 08 22.354           ~ 2 0
13 [RPA2012] A1 Rad 13 20 35.3180 +34 08 22.352           ~ 2 0
14 [RPA2012] A4 Rad 13 20 35.3181 +34 08 22.371           ~ 2 0
15 [RPA2012] A Rad 13 20 35.319 +34 08 22.35           ~ 2 0
16 [RPA2012] A2 Rad 13 20 35.3190 +34 08 22.317           ~ 2 0
17 [RPA2012] B1a Rad 13 20 35.332 +34 08 22.15           ~ 2 0
18 [RPA2012] B2a Rad 13 20 35.356 +34 08 21.74           ~ 2 0
19 SN 2010cu SN* 13 20 35.36 +34 08 22.2           ~ 14 1
20 IC 883 SBG 13 20 35.380 +34 08 21.84   14.8       ~ 378 1
21 SN 2011hi SN* 13 20 35.380 +34 08 22.23           SNII 12 1
22 NGC 5141 LIN 13 24 51.4411147 +36 22 42.772637   13.9       ~ 172 1
23 3C 286 Sy1 13 31 08.2885060664 +30 30 32.960825107   17.51 17.25     ~ 3932 2
24 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2774 4
25 SN 2004et SN* 20 35 25.33 +60 07 17.7   12.88       SNIIP 438 1
26 QSO B2327+335 QSO 23 30 13.7376483 +33 48 36.471790     18.5 18.71   ~ 43 1
27 ICRF J233302.5+390112 Sy2 23 33 02.5333670 +39 01 12.047945     18.50     ~ 24 1

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2021.10.27-09:24:42

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