Sasmirala Individual Information for NGC 5866

Description

NGC 5866 is an edge-on lenticular galaxy at a distance of D = 14.1 ± 2.7 Mpc (NED redshift-independent median) with a borderline LINER/H II nucleus [ho_search_1997-1]. The central bulge and nucleus are crossed by a prominent narrow dust lane. The X-ray evidence for an AGN remains inconclusive [gonzalez-martin_x-ray_2006, gonzalez-martin_x-ray_2009, flohic_central_2006], while a compact core was detected at radio wavelengths [nagar_radio_2000, falcke_radio_2000]. We conservatively treat NGC 5866 as an uncertain AGN. After first being detected in the MIR with IRAS, NGC 5866 was observed with ISO [dale_iso_2000, malhotra_probing_2000, lu_infrared_2003, xilouris_dust_2004] and Spitzer/IRAC, IRS and MIPS. The corresponding IRAC and MIPS images are dominated by the prominent dust lane or edge-on disc with an extended nuclear bulge without a separable nuclear component. Therefore, our extracted IRAC 5.8 and 8.0 μm and MIPS 24 μm fluxes of the central four-arcsecond region (seven for MIPS) are much lower than the total fluxes in the literature [temi_ages_2005, dale_infrared_2005, dale_ultraviolet-radio_2007, munoz-mateos_radial_2009, marble_aromatic_2010]. The IRS LR mapping-mode spectrum suffers from low S/N but shows strong PAH emission and a possibly a weak silicate 10 μm absorption feature from star-formation, but no red spectral slope in νF_ν-space (see also [smith_mid-infrared_2007, marble_aromatic_2010]). The nuclear region of NGC 5866 was observed with Michelle in 2008 in the N’ filter but no compact nucleus was detected. Instead, the dust lane is weakly visible in the image. Our derived flux upper limit of any unresolved nuclear emission is ~ 80% lower than the Spitzer spectrophotometry. The projected central ~ 250 pc of NGC 5866 are, thus, star-formation dominated in the MIR.

• [dale_infrared_2005] D. A. Dale, G. J. Bendo, C. W. Engelbracht, K. D. Gordon, M. W. Regan, L. Armus, J. M. Cannon, D. Calzetti, B. T. Draine, G. Helou, R. D. Joseph, R. C. Kennicutt, A. Li, E. J. Murphy, H. Roussel, F. Walter, H. M. Hanson, D. J. Hollenbach, T. H. Jarrett, L. J. Kewley, C. A. Lamanna, C. Leitherer, M. J. Meyer, G. H. Rieke, M. J. Rieke, K. Sheth, J. D. T. Smith, and M. D. Thornley. Infrared spectral energy distributions of nearby galaxies . ApJ , 633 pp. 857–870, November 2005.
• [dale_iso_2000] Daniel A. Dale, Nancy A. Silbermann, George Helou, Emmanuel Valjavec, Sangeeta Malhotra, Charles A. Beichman, James Brauher, Alessandra Contursi, Harriet L. Dinerstein, David J. Hollenbach, Deidre A. Hunter, Sonali Kolhatkar, Kwok-Yung Lo, Steven D. Lord, Nanyao Y. Lu, Robert H. Rubin, Gordon J. Stacey, Harley A. Thronson, Michael W. Werner, and Harold G. Corwin. ISO mid-infrared observations of normal star-forming galaxies: The key project sample . AJ , 120 pp. 583–603, August 2000.
• [dale_ultraviolet-radio_2007] D. A. Dale, A. Gil de Paz, K. D. Gordon, H. M. Hanson, L. Armus, G. J. Bendo, L. Bianchi, M. Block, S. Boissier, A. Boselli, B. A. Buckalew, V. Buat, D. Burgarella, D. Calzetti, J. M. Cannon, C. W. Engelbracht, G. Helou, D. J. Hollenbach, T. H. Jarrett, R. C. Kennicutt, C. Leitherer, A. Li, B. F. Madore, D. C. Martin, M. J. Meyer, E. J. Murphy, M. W. Regan, H. Roussel, J. D. T. Smith, M. L. Sosey, D. A. Thilker, and F. Walter. An ultraviolet-to-radio broadband spectral atlas of nearby galaxies . ApJ , 655 pp. 863–884, February 2007.
• [falcke_radio_2000] Heino Falcke, Neil M. Nagar, Andrew S. Wilson, and James S. Ulvestad. Radio sources in low-luminosity active galactic nuclei. II. very long baseline interferometry detections of compact radio cores and jets in a sample of LINERs . ApJ , 542 pp. 197–200, October 2000.
• [flohic_central_2006] Hélène M. L. G. Flohic, Michael Eracleous, George Chartas, Joseph C. Shields, and Edward C. Moran. The central engines of 19 LINERs as viewed by chandra . ApJ , 647 pp. 140–160, August 2006.
• [gonzalez-martin_x-ray_2006] O. González-Martín, J. Masegosa, I. Márquez, M. A. Guerrero, and D. Dultzin-Hacyan. X-ray nature of the LINER nuclear sources . A&A , 460 pp. 45–57, December 2006.
• [gonzalez-martin_x-ray_2009] O. González-Martín, J. Masegosa, I. Márquez, M. Guainazzi, and E. Jiménez-Bailón. An x-ray view of 82 LINERs with chandra and XMM-Newton data . A&A , 506 pp. 1107–1121, November 2009.
• [ho_search_1997-1] Luis C. Ho, Alexei V. Filippenko, and Wallace L. W. Sargent. A search for ``Dwarf'' seyfert nuclei. III. spectroscopic parameters and properties of the host galaxies . ApJS , 112 pp. 315, October 1997.
• [lu_infrared_2003] Nanyao Lu, George Helou, Michael W. Werner, Harriet L. Dinerstein, Daniel A. Dale, Nancy A. Silbermann, Sangeeta Malhotra, Charles A. Beichman, and Thomas H. Jarrett. Infrared emission of normal galaxies from 2.5 to 12 micron: Infrared space observatory spectra, near-infrared continuum, and mid-infrared emission features . ApJ , 588 pp. 199–217, May 2003.
• [malhotra_probing_2000] S. Malhotra, D. Hollenbach, G. Helou, N. Silbermann, E. Valjavec, R. H. Rubin, D. Dale, D. Hunter, N. Lu, S. Lord, H. Dinerstein, and H. Thronson. Probing the interstellar medium in early-type galaxies withInfrared space observatory observations . ApJ , 543 pp. 634–643, November 2000.
• [marble_aromatic_2010] A. R. Marble, C. W. Engelbracht, L. van Zee, D. A. Dale, J. D. T. Smith, K. D. Gordon, Y. Wu, J. C. Lee, R. C. Kennicutt, E. D. Skillman, L. C. Johnson, M. Block, D. Calzetti, S. A. Cohen, H. Lee, and M. D. Schuster. An aromatic inventory of the local volume . ApJ , 715 pp. 506–540, May 2010.
• [munoz-mateos_radial_2009] J. C. Muñoz-Mateos, A. Gil de Paz, J. Zamorano, S. Boissier, D. A. Dale, P. G. Pérez-González, J. Gallego, B. F. Madore, G. Bendo, A. Boselli, V. Buat, D. Calzetti, J. Moustakas, and R. C. Kennicutt. Radial distribution of stars, gas, and dust in SINGS galaxies. i. surface photometry and morphology . ApJ , 703 pp. 1569–1596, October 2009.
• [nagar_radio_2000] Neil M. Nagar, Heino Falcke, Andrew S. Wilson, and Luis C. Ho. Radio sources in low-luminosity active galactic nuclei. i. VLA detections of compact, flat-spectrum cores . ApJ , 542 pp. 186–196, October 2000.
• [smith_mid-infrared_2007] J. D. T. Smith, B. T. Draine, D. A. Dale, J. Moustakas, R. C. Kennicutt, G. Helou, L. Armus, H. Roussel, K. Sheth, G. J. Bendo, B. A. Buckalew, D. Calzetti, C. W. Engelbracht, K. D. Gordon, D. J. Hollenbach, A. Li, S. Malhotra, E. J. Murphy, and F. Walter. The mid-infrared spectrum of star-forming galaxies: Global properties of polycyclic aromatic hydrocarbon emission . ApJ , 656 pp. 770–791, February 2007.
• [temi_ages_2005] Pasquale Temi, William G. Mathews, and Fabrizio Brighenti. The ages of elliptical galaxies from mid-infrared emission . ApJ , 622 pp. 235–243, March 2005.
• [xilouris_dust_2004] E. M. Xilouris, S. C. Madden, F. Galliano, L. Vigroux, and M. Sauvage. Dust emission in early-type galaxies: The mid-infrared view . A&A , 416 pp. 41–55, March 2004.

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.