Sasmirala Individual Information for PKS 2158-380
Description
PKS 2158-380/MCG-6-48-13 is a radio-loud lenticular galaxy at a redshift of z = 0.0334 (D ~149 Mpc) with a Sy 2 nucleus [veron-cetty_catalogue_2010] and was first studied in detail by [fosbury_very_1982]. HST observations revealed three compact but resolved sources in the nucleus instead of one central source (total extend ~ 1arcsec ~ 0.7 kpc; PA~ 90∘; [boyce_faint_1996, zirbel_ultraviolet_1998]). In addition, water maser emission was detected in this object [kondratko_discovery_2006]. No Spitzer data are available for PKS 2158-380, which was imaged with VISIR in the SIC filter in 2006 [van_der_wolk_dust_2010]. A compact MIR nucleus is weakly detected in the image. The low S/N prevents a quantitative analyses of the source morphology but the latter seems different than that seen in HST, as only one source was detected. Our nuclear photometry is consistent with the value in [van_der_wolk_dust_2010].
- [boyce_faint_1996] P. J. Boyce, M. J. Disney, F. Macchetto, A. Boksenberg, J. C. Blades, and C. D. Mackay. Faint object camera observations of complex nuclear structure in PKS 2158-380. . A&A , 305 pp. 715, January 1996.
- [fosbury_very_1982] R. A. E. Fosbury, A. Boksenberg, M. A. J. Snijders, I. J. Danziger, M. J. Disney, W. M. Goss, M. V. Penston, W. Wamsteker, K. J. Wellington, and A. S. Wilson. Very extended ionized gas in radio galaxies. i - a radio, optical and ultraviolet study of PKS 2158-380 . MNRAS , 201 pp. 991–1008, December 1982.
- [kondratko_discovery_2006] P. T. Kondratko, L. J. Greenhill, J. M. Moran, J. E. J. Lovell, T. B. H. Kuiper, D. L. Jauncey, L. B. Cameron, J. F. Gómez, C. García-Miró, E. Moll, I. de Gregorio-Monsalvo, and E. Jiménez-Bailón. Discovery of water maser emission in eight AGNs with 70 m antennas of NASA's deep space network . ApJ , 638 pp. 100–105, February 2006.
- [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.
- [zirbel_ultraviolet_1998] Esther L. Zirbel and Stefi A. Baum. The ultraviolet continuum emission of radio galaxies. i. description of sources from the hubble space telescope archives . ApJS , 114 pp. 177, February 1998.
Images
Optical image (DSS, red filter). Displayed are the central 4 arcmin with North being up and East to the left. The colour scaling is linear with white corresponding to the median background (BG) and black to the 0.01% pixels with the highest intensity.
Subarcsecond-resolution MIR images sorted by increasing filter central wavelength. Displayed are the inner 4 arcsec with North being up and East to the left. The colour scaling is logarithmic with white corresponding to median BG and black to the 75% of the highest intensity of all images in units of sig_bg. The inset image (where present; either bottom or top right) shows the central arcsecond of the PSF from the calibrator star, scaled to match the science target. The labels in the bottom left state instrument and filter names (C: COMICS, M: Michelle, T: T-ReCS, V: VISIR).
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.