Sasmirala Individual Information for NGC 612

Description

NGC 612 is a highly inclined, radio-loud early-type galaxy at a redshift of z = 0.0298 (D ~132 Mpc) with hybrid radio morphology [gopal-krishna_extragalactic_2000] and a Sy 2 nucleus [veron-cetty_catalogue_2010] that belongs to the nine-month BAT AGN sample. After IRAS, NGC 612 was observed with Spitzer/IRS in LR staring mode. The spectrum indicates dominant and intense star formation with strong PAH features, silicate 10 μm absorption and a slightly red spectral slope in νF_ν-space. In the WISE images, NGC 612 appears elliptically elongated along the galaxy major axis. We observed the object with VISIR in three narrow N-band filters in 2009 but did not detect any nuclear MIR emission. Our derived upper limits are on average ~ 49% below the IRS spectrum, which indicates that the MIR emission of NGC 612 is indeed dominated by star formation with only a weak AGN.

• [gopal-krishna_extragalactic_2000] Gopal-Krishna and P. J. Wiita. Extragalactic radio sources with hybrid morphology: implications for the fanaroff-riley dichotomy . A&A , 363 pp. 507–516, November 2000.
• [veron-cetty_catalogue_2010] M.-P. Véron-Cetty and P. Véron. A catalogue of quasars and active nuclei: 13th edition . A&A , 518 pp. 10, July 2010.

Images

SEDs

MIR SED. The description of the symbols in all the SED plots (where present) is the following: Grey crosses and solid lines mark the Spitzer/IRAC, MIPS and IRS data. The colour coding of the other symbols is as follows: green for COMICS, magenta for Michelle, blue for T-ReCS and red for VISIR data. Darker-coloured solid lines mark spectra of the corresponding instrument. The black filled circles mark the nuclear 12 and 18 micron continuum emission estimate from the data (where present). The ticks on the top axis mark positions of common MIR emission lines, while the light grey horizontal bars mark wavelength ranges affected by the silicate 10 and 18 micron features.