Radio–infrared correlation for local dusty galaxies and dusty AGNs from the AKARI All-Sky Survey

PASJ: Publications of the Astronomical Society of Japan

Bilicki, Maciej¹  Pia̧tek, Paweł¹  Takeuchi, Tsutomu T²  Pȩpiak, Agata³  Solarz, Aleksandra⁴  Pollo, Agnieszka⁴ 

[1] Astronomical Observatory of the Jagiellonian University, ul. Orla 171, 30-244 Kraków, Poland;Center for Theoretical Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-668, Warsaw, Poland;Leiden Observatory, Leiden University, P.O.Box 9513, 2300RA Leiden, the Netherlands;National Center for Nuclear Research, ul. Hoża 69, 00-681 Warsaw, Poland

关键词: (galaxies:) quasars: emission lines;    galaxies: statistics;    infrared: galaxies;    galaxies: fundamental parameters;   

DOI  :  10.1093/pasj/psz013

学科分类：天文学(综合)

来源: Oxford University Press

【 摘 要 】

We use the new release of the AKARI Far-Infrared All-Sky Survey (FIS) matched with the NVSS radio database to investigate the local (⁠|$z$| < 0.25) far-infrared–radio correlation (FIRC) of different types of extragalactic sources. To obtain the redshift information for the AKARI FIS sources we cross-match the catalogue with the SDSS DR8. This also allows us to use emission line properties to divide sources into four categories: (i) star-forming galaxies (SFGs), (ii) composite galaxies (displaying both star formation and active nucleus components), (iii) Seyfert galaxies, and (iv) low-ionization nuclear emission-line region (LINER) galaxies. We find that the Seyfert galaxies have the lowest far-infrared/radio flux ratios and display excess radio emission when compared to the SFGs. We conclude that the FIRC can be used to separate SFGs and AGNs only for the most radio-loud objects.

【 授权许可】

CC BY