J/MNRAS/515/3956 PCA characterization of activity in S0s (Jimenez-Palau+, 2022)
The local Universe in the era of large surveys.
II. Multi-wavelength characterisation of activity in nearby S0 galaxies
Jimenez-Palau C., Solanes J.M., Perea J.D., del Olmo A., Tous J.L.
<Mon. Not. R. Astron. Soc. 515, 3956 (2022)>
=2022MNRAS.515.3956J 2022MNRAS.515.3956J (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, optical ; Galaxies, spectra
Keywords: galaxies: active - galaxies: elliptical and lenticular, cD -
galaxies: star formation - infrared: galaxies -
radio continuum: galaxies - X-rays: galaxies
Abstract:
This is the second paper in a series using data from tens of thousands
S0 galaxies of the local Universe (z≲0.1) retrieved from the
NASA-Sloan Atlas. It builds on the outcomes of the previous work,
which introduced a new classification scheme for these objects based
on the principal component analysis (PCA) of their optical spectrum
and its projections on to the first two eigenvectors or principal
components (the PC1-PC2 diagram). We provide a comprehensive
characterization of the activity of present-day S0s throughout both
the broad-band PC1-PC2 spectral classifier and the conventional
narrow-line BPT/WHAN ones, contrasting the different types of activity
classes they define, and present an alternative diagram that exploits
the concordance between WHAN and PCA demarcations. The analysis is
extended to the mid-infrared, radio and X-ray wavelengths by
crossmatching our core sample with data from the WISE, FIRST,
XMM-Newton, and Chandra surveys. This has allowed us to carry out a
thorough comparison of the most important activity diagnostics in the
literature over different wavebands, discuss their similarities and
differences, and explore the connections between them and with
parameters related to star formation and black hole accretion. In
particular, we find evidence that the bulk of nebular emission from
radio and X-ray detected S0-Seyfert and LINER systems is not driven
by star birth, while the dominant ionising radiation for a number of
LINERs might come from post-AGB stars. These and other outcomes from
the present work should be transferable to other morphologies.
Description:
Mean flux and first five principal components of S0 galaxies in the
SDSS optical waveband derived by Tous et al. (TSP20,
2020MNRAS.495.4135T 2020MNRAS.495.4135T). Please cite Jimenez-Palau et al.
(2022MNRAS.515.3956J 2022MNRAS.515.3956J ) and TSP20 if you use these data.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 59 3280 Mean optical spectrum and first five eigenspectra
inferred from S0 galaxies with z≤0.1 (principal
components from Tous et al., 2020MNRAS.495.4135T 2020MNRAS.495.4135T)
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 6 F6.1 0.1nm lambda Wavelength (log binning)
8- 14 F7.5 --- Fmean Mean flux, normalized
16- 23 F8.5 --- es1 First eigenspectrum
25- 32 F8.5 --- es2 Second eigenspectrum
34- 41 F8.5 --- es3 Third eigenspectrum
43- 50 F8.5 --- es4 Fourth eigenspectrum
52- 59 F8.5 --- es5 Fifth eigenspectrum
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Acknowledgements:
Jose L. Tous, jtous(at)fqa.ub.edu
References:
Tous et al., Paper I. 2020MNRAS.495.4135T 2020MNRAS.495.4135T
(End) Jose L. Tous [ICCUB], Patricia Vannier [CDS] 17-Aug-2022