Sasmirala Individual Information for 3C 105

Description

3C 105 is a FR II radio source identified with the elliptical galaxy LEDA 14492 at a redshift of z = 0.089 (D ~ 421 Mpc). It contains a radio-loud Sy 2 AGN [veron-cetty_catalogue_2010] that belongs to the nine-month BAT AGN sample. It features the classical FR II super-galactic radio lobes in north-west and south-east directions without a collimated jet evident (PA~ 20^∘; e.g., [baum_extended_1988, leahy_study_1997]). The first successful MIR observations of 3C 105 were performed with Spitzer/IRS and MIPS, and the corresponding images show a point source. Our nuclear photometry agrees with [dicken_origin_2008]. Despite the very low S/N of the IRS LR mapping-mode spectrum, silicate 10 μm absorption is visible together with a red spectral slope in νF_ν-space (see also [dicken_spitzer_2012]). 3C 105 was observed with VISIR in the broad SIC filter in 2005 [van_der_wolk_dust_2010] and in three narrow N-band filters in 2009 (this work). While the nucleus remained undetected in the SIC image, a compact nucleus is weakly detected in both NEII_2 images. The low S/N, however, does not allow for any robust conclusion about the nuclear extension at subarcsecond scales in the MIR. Our derived flux upper limit for the SIC image is several times higher than the value of [van_der_wolk_dust_2010] for unknown reasons. Our nuclear VISIR fluxes are in general consistent with the Spitzer spectrophotometry.

• [baum_extended_1988] Stefi Alison Baum, Timothy M. Heckman, Alan Bridle, Wil J. M. van Breugel, and George K. Miley. Extended optical-line-emitting gas in radio galaxies - broad-band optical, narrow-band optical, and radio imaging of a representative sample . ApJS , 68 pp. 643–714, December 1988.
• [dicken_origin_2008] D. Dicken, C. Tadhunter, R. Morganti, C. Buchanan, T. Oosterloo, and D. Axon. The origin of the infrared emission in radio galaxies. i. new mid- to far-infrared and radio observations of the 2 jy sample . ApJ , 678 pp. 712–728, May 2008.
• [dicken_spitzer_2012] D. Dicken, C. Tadhunter, D. Axon, R. Morganti, A. Robinson, M. B. N. Kouwenhoven, H. Spoon, P. Kharb, K. J. Inskip, J. Holt, C. Ramos Almeida, and N. P. H. Nesvadba. Spitzer mid-IR spectroscopy of powerful 2 jy and 3CRR radio galaxies. i. evidence against a strong starburst-AGN connection in radio-loud AGN . ApJ , 745 pp. 172, February 2012.
• [leahy_study_1997] J. P. Leahy, A. R. S. Black, J. Dennett-Thorpe, M. J. Hardcastle, S. Komissarov, R. A. Perley, J. M. Riley, and P. A. G. Scheuer. A study of FRII radio galaxies with z<0.15 - II. high-resolution maps of 11 sources at 3.6 CM . MNRAS , 291 pp. 20–53, October 1997.
• [van_der_wolk_dust_2010] G. van der Wolk, P. D. Barthel, R. F. Peletier, and J. W. Pel. Dust tori in radio galaxies . A&A , 511 pp. 64, February 2010.
• [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.