Sasmirala Individual Information for NGC 4746
Description
NGC 4746 is an edge-on spiral galaxy at a distance of D = 33.5 ± 5.5 Mpc (NED redshift-independent) with a little-studied possibly active nucleus, which has been classified as a borderline LINER/H II [decarli_census_2007]. No pointed X -ray observations are published and no compact source was detected with subarcsecond-resolution radio observations [irwin_high-resolution_2000]. We conservatively treat NGC 4746 as an uncertain AGN. No Spitzer observations are available for NGC 4746. The WISE images show the extended flattened host emission without a clearly separable unresolved nuclear component. The nuclear region of NGC 4746 was observed with VISIR in the PAH2 filter in 2005, but nothing was detected [siebenmorgen_nuclear_2008]. This lack of data prohibits any conclusions about the presence of a weak AGN in NGC 4746.
- [decarli_census_2007] R. Decarli, G. Gavazzi, I. Arosio, L. Cortese, A. Boselli, C. Bonfanti, and M. Colpi. The census of nuclear activity of late-type galaxies in the virgo cluster . MNRAS , 381 pp. 136–150, October 2007.
- [irwin_high-resolution_2000] Judith A. Irwin, D. J. Saikia, and Jayanne English. High-resolution radio continuum observations of edge-on spiral galaxies . AJ , 119 pp. 1592–1607, April 2000.
- [siebenmorgen_nuclear_2008] R. Siebenmorgen, M. Haas, E. Pantin, E. Krügel, C. Leipski, H. U. Käufl, P. O. Lagage, A. Moorwood, A. Smette, and M. Sterzik. Nuclear activity in nearby galaxies. mid-infrared imaging with the VLT . A&A , 488 pp. 83–90, September 2008.
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.
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.