Poststarburst Models of LINERS

ActiveGuard Mattress Liners

Mid-Infrared Diagnostics of LINERs

We report results from the first mid-infrared spectroscopic study of a comprehensive sample of 33 LINERs, observed with the Spitzer Space Telescope. We compare the properties of two different LINER populations: infrared-faint LINERs, with LINER emission arising mostly in compact nuclear regions, and infrared-luminous LINERs, which often show spatially extended (non-AGN) LINER emission. We show ...

Variability in LINERs

A small number of LINERs have been seen to display variable Hα emission with a very broad, double-peaked profile. Recent observations with the Hubble Space Telescope indicate that such emission may be a common attribute of LINERs. The double-peaked or doubleshouldered line profiles resemble those found in a subset of broad-line radio galaxies. Several lines of argument suggest that such feature...

Globular Cluster Populations in Four Early - Type Poststarburst Galaxies

We present a study of the globular cluster systems of four early-type poststarburst galaxies using deep gand I-band images from the ACS camera aboard the Hubble Space Telescope (HST). All the galaxies feature shells distributed around their main bodies and are thus likely merger remnants. The color distribution of the globular clusters in all four galaxies shows a broad peak centered on g − I ≈...

The polyhedral nature of LINERs: An XMM-Newton view of LINERs in radio galaxies

Aims. We investigate the origin of X-rays and the nature of accretion flow in 4 low-ionization nuclear emission-line regions (LINERs) hosted by radio galaxies, namely NGC 1692, PKS 0625–35, 3C 88, 3C 444, recently observed with XMM-Newton. Methods. We combine the results from the time-averaged spectral analysis with model-independent information from X-ray temporal and spectral variability anal...