Sasmirala Individual Information for ESO 511-30
Description
ESO 511-30 is a face-on spiral galaxy at a redshift of z = 0.0224 (D ~ 97.1 Mpc) hosting a Sy 1 nucleus [veron-cetty_catalogue_2010], belonging to the nine-month BAT AGN sample. It was observed with Spitzer/IRS and MIPS and appears compact in the MIPS 24 μm image. The IRS LR staring-mode spectrum exhibits prominent silicate 10 and 18 μm emission and a blue spectral slope in νFν-space (see also [sargsyan_infrared_2011]). We observed ESO 511-30 with VISIR in three narrow N-band filters in one night of 2010 and detected a compact MIR nucleus without any sign of extended host emission. The nuclear emission appears elongated in the SIV and PAH2 filter images (FWHM(major axis)~ 0.38arcsec ~ 170 pc, PA~ 80∘), while the S/N in the NEII filter image is too low for an extension analysis. A second epoch of subarcsecond MIR observations is necessary to confirm this elongation to be source intrinsic. The photometry in the SIV and PAH2 filters is consistent with the Spitzer spectrophotometry, while the NEII flux is significantly lower. We employ the IRS spectrum to correct our 12 μm continuum emission estimate for the silicate emission. Note that, in particular, the nuclear SIV and PAH2 fluxes would be significantly lower if the presence of subarcsecond-extended emission can be verified.
- [sargsyan_infrared_2011] Lusine Sargsyan, Daniel Weedman, Vianney Lebouteiller, James Houck, Donald Barry, Ashot Hovhannisyan, and Areg Mickaelian. Infrared spectra and spectral energy distributions for dusty starbursts and active galactic nuclei . ApJ , 730 pp. 19, March 2011.
- [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
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.
Spitzer MIR images. Displayed are the inner 40 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 0.1% pixels with the highest intensity. The label in the bottom left states instrument and central wavelength of the filter in micron (I: IRAC, M: MIPS).
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.