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A Possible Evolutionary Connection between AGN and Starburst in LINERs | | S.J. Lei
; J.H. Huang
; W. Zheng
; L. Ji
; Q.S.Gu
; | | Date: |
22 Sep 2000 | | Subject: | astro-ph | | Affiliation: | 1,2),J.H. Huang (1,2),W. Zheng ,L. Ji (1,2),Q.S.Gu (1,2) (Nanjing University, Nanjing, China,United Lab for Optical Astronomy, China,The Johns Hopkins University,U.S.A. | | Abstract: | Our analysis on the two magnitude-limited samples of LINERs suggests a correlation between $L_{FIR}/L_{B}$ or f(25micron)/f(60micron), and Hubble-type index at $>$99.99% significance level. As $L_{FIR}/L_{B}$ and f(25micron)/f(60micron) are considered as the indicators of star-formation activity and AGN activity, respectively, our result suggests that LINERs with higher AGN activity may have a lower star-formation contribution. The ones with highest AGN activity and lowest star-formation contributions are ellipticals. All well-studied LINER 1s belong to this group. On the other hand, LINERs with higher star-formation activity present lower AGN contributions. We find all well-studied LINER 2s in this parameter space. Most of LINERs having inner ring structures belong to this group. Statistics with other indicators of star-formation or AGN activity (nulear mass-to-light ratio at H band, and the ratio of X-ray-to-UV power) provide further evidence for such a trend. We have seen that along with the evolution of galaxies from late-type spirals to early-type ones, and up to ellipticals, the intensity of AGN activity increases with decreasing star-formation contributions, The above analyses may suggest a possible connection between the host galaxies and nuclear activities, and it might also indicate a possible evolutionary connection between AGN and starburst in LINERs. | | Source: | arXiv, astro-ph/0009364 | | Services: | Forum | Review | PDF | Favorites | |
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