2011MNRAS.416.1267M


C.D.S. - SIMBAD4 rel 1.7 - 2021.05.17CEST21:52:29

2011MNRAS.416.1267M - Mon. Not. R. Astron. Soc., 416, 1267-1273 (2011/September-2)

Optical and OH megamaser observations of the starburst galaxy IIZw 096.

MIGENES V., COZIOL R., COOPRIDER K., KLOCKNER H.-R., PLAUCHU-FRAYN I., ISLAS J.M. and RAMIREZ-GARDUNO L.

Abstract (from CDS):

Using the Multi-Element Radio-Linked Interferometer Network (MERLIN), we have acquired a high spatial resolution spectral image of the OH megamaser (OHMM) in the nearby starburst `galaxy' known as IIZw 096. We have also acquired optical B, V, R, I and Hα images with the 1.5-m telescope in San Pedro Mártir. By comparing the MERLIN observations with Hubble archive images, we are able to pinpoint the location of the OH maser emission in this object; the OHMM emission seems to be associated with a faint and reddish, compact-round structure (a few hundred parsecs) off-centre of a merging system of galaxies. From the colour and strong Hα emission, this object is consistent with the remains of the nucleus of a very perturbed galaxy in interaction. Assuming a Keplerian bounded system the mass necessary to produce a velocity range of ≈ 200 km/s for the OHMM is of the order of 109 M, which is consistent with a massive black hole. Consequently, although the OHMM was previously suspected to be of starburst origin, our analysis suggests that an active galactic nucleus (AGN) could also be present in this merging system making it a composite source. IIZw 096 is a nearby example which shows how high spatial resolution data of the OHMM emission region, and supporting optical data, can be extremely helpful in determining the nature (starburst, AGN or composite) of such phenomenon.

Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): masers - galaxies: interactions - galaxies: starburst

Nomenclature: Fig. 4: [MCC2011] A (Nos A-D). Fig. 5, Table 1: [MCC2011] AN (Nos B1-B8, E1-E3).

Simbad objects: 9

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Number of rows : 9

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 ZW III 35 Sy2 01 44 30.516 +17 06 09.18   15.24 14.81     ~ 228 0
2 Mrk 231 Sy1 12 56 14.2340989340 +56 52 25.238555193   14.68 13.84     ~ 1830 3
3 Mrk 273 Sy2 13 44 42.164 +55 53 13.53   15.68 14.91     ~ 840 3
4 IC 4553 SyG 15 34 57.22396 +23 30 11.6084   14.76 13.88     ~ 2745 4
5 ICRF J205135.5+174336 BLL 20 51 35.5829387 +17 43 36.900104     18.0 14.41   ~ 28 1
6 2MASX J20572362+1707445 PaG 20 57 23.628 +17 07 44.60   15.2       ~ 146 0
7 BD+28 4211 HS* 21 51 11.0220905905 +28 51 50.366090892 8.922 10.25 10.58 10.656 10.831 sdO2VIIIHe5 749 0
8 BD+25 4655 HS* 21 59 41.9751489837 +26 25 57.398356446 8.27 9.39 9.68     sdO6 104 0
9 GD 248 WD* 23 26 06.5870632822 +16 00 19.282796891 14.431 15.206 15.112 15.034 14.977 DA5 77 0

    Equat.    Gal    SGal    Ecl

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2021.05.17-21:52:29

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