Sasmirala Individual Information for IC 4329A

Description

IC 4329A is an edge-on spiral galaxy at a redshift of z = 0.0161 (D ~ 70.6 Mpc) with a Sy 1.2 nucleus [veron-cetty_catalogue_2010] that belongs to the nine-month BAT AGN sample. According to its high luminosity, IC 4329A is the nearest quasar-like object [wilson_ic_1979]. The nucleus is partly obscured by a prominent dust lane, but the X-ray properties indicate additional absorption closer to the AGN [steenbrugge_xmm-newton_2005]. Pioneering MIR observations of IC 4329A were performed by [kleinmann_10-micron_1974], [rieke_infrared_1978], [roche_8-13_1984] and [ward_continuum_1987]. Apart from IRAS, it was also observed with ISO/ISOCAM but appeared basically unresolved [ramos_almeida_mid-infrared_2007]. The first sub-arcsecond resolution images were made with Palomar 5 m/MIRLIN in 2000 [gorjian_10_2004] and with the ESO 3.6 m/TIMMI2 in 2002 [siebenmorgen_mid-infrared_2004]. An unresolved MIR nucleus was detected. IC 4329A was also observed with Spitzer/IRAC, IRS and MIPS. The unresolved MIR nucleus is saturated in the IRAC 5.8 and 8.0 μm PBCD images, which therefore are not analysed (but see [gallimore_infrared_2010]). The IRS LR staring-mode spectrum displays weak silicate 10 and 18 μm emission and peaks at ~ 17 μm in νF_ν-space (see also [buchanan_spitzer_2006, shi_9.7_2006, wu_spitzer/irs_2009, tommasin_spitzer-irs_2010, gallimore_infrared_2010, mullaney_defining_2011]). We observed IC 4329A with VISIR in two narrow N-band filters and LR N-band spectroscopy in 2009 [honig_dusty_2010-1] and in three additional filters in 2010. It was also observed with T-ReCS in the N- and Q-bands in 2009 (unpublished, to our knowledge). A compact but elongated MIR nucleus was consistently detected in all images (FWHM(major axis) ~ 0.4arcsec ~ 130 pc; PA~ 60^∘). The VISIR and T-ReCS spectrophotometry is, in general, consistent with the Spitzer spectrophotometry. However, at the shortest wavelengths, the VISIR spectrum increasingly deviates from the other data towards lower flux levels. In addition, the T-ReCS Q-band flux is significantly above the Spitzer flux level. Combining all the N-band measurements from 1974 until 2010, the 10  μm flux of IC 4329A has possibly varied by ~ 20%. Its nuclear MIR emission could be further resolved with MIDI interferometric observations and was modelled as two approximately equally bright components, one extending by ~ 20 pc, and one remaining unresolved (\⪅2 pc; [burtscher_diversity_2013]).

• [buchanan_spitzer_2006] Catherine L. Buchanan, Jack F. Gallimore, Christopher P. O'Dea, Stefi A. Baum, David J. Axon, Andrew Robinson, Moshe Elitzur, and Martin Elvis. Spitzer IRS spectra of a large sample of seyfert galaxies: A variety of infrared spectral energy distributions in the local active galactic nucleus population . AJ , 132 pp. 401–419, July 2006.
• [burtscher_diversity_2013] L. Burtscher, K. Meisenheimer, K. R. W. Tristram, W. Jaffe, S. F. Hönig, R. I. Davies, M. Kishimoto, J.-U. Pott, H. Röttgering, M. Schartmann, G. Weigelt, and S. Wolf. A diversity of dusty AGN tori. data release for the VLTI/MIDI AGN large program and first results for 23 galaxies . A&A , 558 pp. 149, October 2013.
• [gallimore_infrared_2010] J. F. Gallimore, A. Yzaguirre, J. Jakoboski, M. J. Stevenosky, D. J. Axon, S. A. Baum, C. L. Buchanan, M. Elitzur, M. Elvis, C. P. O'Dea, and A. Robinson. Infrared spectral energy distributions of seyfert galaxies: Spitzer space telescope observations of the 12 μm sample of active galaxies . ApJS , 187 pp. 172–211, March 2010.
• [gorjian_10_2004] V. Gorjian, M. W. Werner, T. H. Jarrett, D. M. Cole, and M. E. Ressler. 10 micron imaging of seyfert galaxies from the 12 micron sample . ApJ , 605 pp. 156–167, April 2004.
• [honig_dusty_2010-1] S. F. Hönig, M. Kishimoto, P. Gandhi, A. Smette, D. Asmus, W. Duschl, M. Polletta, and G. Weigelt. The dusty heart of nearby active galaxies. i. high-spatial resolution mid-IR spectro-photometry of seyfert galaxies . A&A , 515 pp. 23, June 2010.
• [kleinmann_10-micron_1974] D. E. Kleinmann and E. L. Wright. 10-MICRON observations of southern-hemisphere galaxies . ApJL , 191 pp. L19, July 1974.
• [mullaney_defining_2011] J. R. Mullaney, D. M. Alexander, A. D. Goulding, and R. C. Hickox. Defining the intrinsic AGN infrared spectral energy distribution and measuring its contribution to the infrared output of composite galaxies . MNRAS , page 474, April 2011.
• [ramos_almeida_mid-infrared_2007] C. Ramos Almeida, A. M. Pérez García, J. A. Acosta-Pulido, and J. M. Rodríguez Espinosa. The mid-infrared emission of seyfert galaxies: A new analysis of ISOCAM data . AJ , 134 pp. 2006–2019, November 2007.
• [rieke_infrared_1978] G. H. Rieke. The infrared emission of seyfert galaxies . ApJ , 226 pp. 550–558, December 1978.
• [roche_8-13_1984] P. F. Roche, B. Whitmore, D. K. Aitken, and M. M. Phillips. 8-13 micron spectrophotometry of galaxies. II - 10 seyferts and 3C 273 . MNRAS , 207 pp. 35–45, March 1984.
• [shi_9.7_2006] Y. Shi, G. H. Rieke, D. C. Hines, V. Gorjian, M. W. Werner, K. Cleary, F. J. Low, P. S. Smith, and J. Bouwman. 9.7 μm silicate features in active galactic nuclei: New insights into unification models . ApJ , 653 pp. 127–136, December 2006.
• [siebenmorgen_mid-infrared_2004] R. Siebenmorgen, E. Krügel, and H. W. W. Spoon. Mid-infrared emission of galactic nuclei. TIMMI2 versus ISO observations and models . A&A , 414 pp. 123–139, January 2004.
• [steenbrugge_xmm-newton_2005] K. C. Steenbrugge, J. S. Kaastra, M. Sako, G. Branduardi-Raymont, E. Behar, F. B. S. Paerels, A. J. Blustin, and S. M. Kahn. XMM-Newton observations of the heavily absorbed seyfert 1 galaxy IC 4329A . A&A , 432 pp. 453–462, March 2005.
• [tommasin_spitzer-irs_2010] Silvia Tommasin, Luigi Spinoglio, Matthew A. Malkan, and Giovanni Fazio. Spitzer-IRS high-resolution spectroscopy of the 12 μm seyfert galaxies. II. results for the complete data set . ApJ , 709 pp. 1257–1283, 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.
• [ward_continuum_1987] Martin Ward, Martin Elvis, G. Fabbiano, N. P. Carleton, S. P. Willner, and A. Lawrence. The continuum of type 1 seyfert galaxies. i - a single form modified by the effects of dust . ApJ , 315 pp. 74–91, April 1987.
• [wilson_ic_1979] A. S. Wilson and M. V. Penston. IC 4329A - the nearest quasar . ApJ , 232 pp. 389–399, September 1979.
• [wu_spitzer/irs_2009] Yanling Wu, Vassilis Charmandaris, Jiasheng Huang, Luigi Spinoglio, and Silvia Tommasin. Spitzer/IRS 5-35 μm low-resolution spectroscopy of the 12 μm seyfert sample . ApJ , 701 pp. 658–676, August 2009.

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.