Chandra X-ray's study of LeMMINGs galaxies

All 280 of the statistically complete Palomar sample of nearby ( 20{deg} have been observed at 1.5 GHz as part of the LeMMINGs e-MERLIN legacy survey. Here, we present Chandra X-ray observations of the nuclei of 213 of these galaxies, including a statistically complete sub-set of 113 galaxies in the declination range 40{deg} < {delta} < 65{deg}. We observed galaxies of all optical spectral types, including 'active' galaxies [e.g. low-ionization nuclear emission line regions (LINERs) and Seyferts] and 'inactive' galaxies like H II galaxies and absorption line galaxies (ALG). The X-ray flux limit of our survey is 1.65*10^-14^ erg/s/cm^2^ (0.3-10 keV). We detect X-ray emission coincident within 2 arcsec of the nucleus in 150/213 galaxies, including 13/14 Seyferts, 68/77 LINERs, 13/22 ALGs and 56/100 H II galaxies, but cannot completely rule out contamination from non-AGN processes in sources with nuclear luminosities <~ 10^39^ erg/S. We construct an X-ray Luminosity function (XLF) and find that the local galaxy XLF, when including all active galactic nucleus (AGN) types, can be represented as a single power law of slope -0.54 +/- 0.06. The Eddington ratio of the Seyferts is usually 2-4 decades higher than that of the LINERs, ALGs, and H II galaxies, which are mostly detected with Eddington ratios <~ 10^-3^. Using [O III] line measurements and black hole masses from the literature, we show that LINERs, H II galaxies and ALGs follow similar correlations to low luminosities, suggesting that some 'inactive' galaxies may harbour AGN.

Cone search capability for table J/MNRAS/510/4909/table1 (Basic properties of our X-ray sample)

Identifier
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/MNRAS/510/4909
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/510/4909
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/510/4909
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/MNRAS/510/4909
Provenance
Creator Williams D.R.A.; Pahari M.; Baldi R.D.; Mchardy I.M.; Mathur S.,Beswick R.J.; Beri A.; Boorman P.; Aalto S.; Alberdi A.; Argo M.K.,Dullo B.T.; Fenech D.M.; Green D.A.; Knapen J.H.; Marti-Vidal I.,Moldon J.; Mundell C.G.; Muxlow T.W.B.; Panessa F.; Perez-Torres M.,Saikia P.; Shankar F.; Stevens I.R.; Uttley P.
Publisher CDS
Publication Year 2025
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Cosmology; Galactic and extragalactic Astronomy; High Energy Astrophysics; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy