Sasmirala Individual Information for 3C 449
Description
3C 449 is a FR I radio source identified with the elliptical galaxy UGC 12064 at a redshift of z = 0.0171 (D ~ 72.4 Mpc), the southern component of a close pair of galaxies. It contains an active nucleus with optical LINER classification [buttiglione_optical_2009, buttiglione_optical_2010]. 3C 449 features supergalactic-scale twisted twin jets along the north-south axis (PA~ 9∘; [perley_structure_1979, feretti_vla_1999]) and a nuclear dust disc ~ 1.5 kpc in diameter (PA~ 155∘; [martel_hubble_1999, tremblay_warped_2006]). Note that there is a smaller companion galaxy in projection ~ 38arcsec ~ 13 kpc to the north (PA~ 13∘) of UGC 12064. The first detection in the N-band was achieved with IRTF [sparks_infrared_1986, impey_infrared_1990] and then followed up with ISO/ISOCAM [siebenmorgen_isocam_2004]. 3C 449 was also observed with Spitzer/IRAC, IRS and MIPS, and a compact nucleus embedded in diffuse host emission was detected in the corresponding images. The high-resolution mode IRS spectrum is extremely noisy and does not allow us to discern spectral features apart from a shallow blue spectral continuum slope in νFν-space. Note, however, that no background subtraction was performed for this spectrum. Silicate 10 μm emission is possibly present. We observed 3C 449 with COMICS in the N11.7 filter in 2009 but did not detect the object. The corresponding upper limit on the nuclear N11.7 flux is roughly consistent with the Spitzer spectrophotometry.
- [buttiglione_optical_2009] S. Buttiglione, A. Capetti, A. Celotti, D. J. Axon, M. Chiaberge, F. D. Macchetto, and W. B. Sparks. An optical spectroscopic survey of the 3CR sample of radio galaxies with z < 0.3. i. presentation of the data . A&A , 495 pp. 1033–1060, March 2009.
- [buttiglione_optical_2010] S. Buttiglione, A. Capetti, A. Celotti, D. J. Axon, M. Chiaberge, F. D. Macchetto, and W. B. Sparks. An optical spectroscopic survey of the 3CR sample of radio galaxies with z < 0.3 . II. spectroscopic classes and accretion modes in radio-loud AGN . A&A , 509 pp. 6, January 2010.
- [feretti_vla_1999] L. Feretti, R. Perley, G. Giovannini, and H. Andernach. VLA observations of the giant radio galaxy 3C 449 . A&A , 341 pp. 29–43, January 1999.
- [impey_infrared_1990] C. D. Impey, C. G. Wynn-Williams, and E. E. Becklin. Infrared studies of elliptical galaxies. II - a radio-selected sample . ApJ , 356 pp. 62–74, June 1990.
- [martel_hubble_1999] André R. Martel, Stefi A. Baum, William B. Sparks, Eric Wyckoff, John A. Biretta, Daniel Golombek, Ferdinando D. Macchetto, Sigrid de Koff, Patrick J. McCarthy, and George K. Miley. Hubble space telescope snapshot survey of 3CR radio source counterparts. III. radio galaxies with z<0.1 . ApJS , 122 pp. 81–108, May 1999.
- [perley_structure_1979] R. A. Perley, A. G. Willis, and J. S. Scott. The structure of the radio jets in 3C449 . Nature , 281 pp. 437–442, October 1979.
- [siebenmorgen_isocam_2004] R. Siebenmorgen, W. Freudling, E. Krügel, and M. Haas. ISOCAM survey and dust models of 3CR radio galaxies and quasars . A&A , 421 pp. 129–145, July 2004.
- [sparks_infrared_1986] W. B. Sparks, J. H. Hough, D. J. Axon, and J. Bailey. Infrared photometry of the nuclei of early-type radio galaxies . MNRAS , 218 pp. 429–444, February 1986.
- [tremblay_warped_2006] Grant R. Tremblay, Alice C. Quillen, David J. E. Floyd, Jacob Noel-Storr, Stefi A. Baum, David Axon, Christopher P. O'Dea, Marco Chiaberge, F. Duccio Macchetto, William B. Sparks, George K. Miley, Alessandro Capetti, Juan P. Madrid, and Eric Perlman. The warped nuclear disk of radio galaxy 3C 449 . ApJ , 643 pp. 101–111, May 2006.
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).
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.