J/A+A/587/A138 Low-luminosity type-1 QSO sample. V. (Busch+, 2016)
A low-luminosity type-1 QSO sample.
V. Overluminous host spheroids and their excitation mechanisms.
Busch G., Fazeli N., Eckart A., Valencia-S. M., Smajic S., Moser L.,
Scharwaechter J., Dierkes J., Fischer S.
<Astron. Astrophys. 587, A138 (2016)>
=2016A&A...587A.138B 2016A&A...587A.138B (SIMBAD/NED BibCode)
ADC_Keywords: Active gal. nuclei ; Galaxies, Seyfert ; Spectra, infrared
Keywords: galaxies: active - galaxies: starburst - galaxies: nuclei -
galaxies: Seyfert - infrared: galaxies
Abstract:
We present near-infrared (NIR) H+K-band long-slit spectra of eleven
galaxies that were obtained with SOFI at the NTT (ESO). The galaxies
are chosen from the low-luminosity type-1 quasi-stellar object (LLQSO)
sample, which comprises the 99 closest (z≤0.06) QSOs from the
Hamburg/ESO survey for bright UV-excess QSOs. These objects are ideal
targets to study the gap between local Seyfert galaxies and
high-redshift quasars because they show much stronger AGN activity
than local objects, but are still close enough for a detailed
structural analysis. We fit hydrogen recombination, molecular
hydrogen, and [FeII] lines after carefully subtracting the continuum
emission. From the broad Paα components, we estimated black hole
masses and enlarged the sample of LLQSOs that deviate from the
MBH-Lbulge relations of inactive galaxies from 12 to 16 objects. All
objects show emission from hot dust (T∼1200K) as well as stellar
contribution. However, the respective fractions vary strongly among
the objects. More than half of the objects show H2 emission lines,
which indicate a large reservoir of molecular gas that is needed to
feed the AGN and star formation. In the NIR diagnostic diagram all
objects lie in the location of AGN-dominated objects. However, most of
the objects show indications of star formation activity, suggesting
that their offset location with respect to MBH-Lbulge relations of
inactive galaxies may be a consequence of overluminous bulges.
Description:
The paper presents near-infrared H+K-band long-slit spectra of 11 low-
luminosity QSOs (redshift 0.02<z<0.06). Typical integration times are
∼7200s per object on-source. A slit width of 1 arcsec at a seeing
ranging from 0.9 to 1.7 arcsec was used.
In the table, we deliver spectra of all 11 galaxies. The wavelength is
given in the observer frame (unit: micrometers). The spectra are
extracted from apertures with diameter corresponding to 3x FWHM of the
seeing.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
sources.dat 35 11 List of galaxies
spectra.dat 155 1024 Spectra
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See also:
J/A+A/561/A140 : Low-luminosity type-1 QSO sample. I. (Busch+, 2014)
J/A+A/580/A113 : Low-luminosity type-1 QSO sample. III. (Tremou+, 2015)
Byte-by-byte Description of file: sources.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Galaxy name
13- 14 I2 h RAh Simbad right ascension (J2000)
16- 17 I2 min RAm Simbad right ascension (J2000)
19- 23 F5.2 s RAs Simbad right ascension (J2000)
25 A1 --- DE- Declination sign (J2000)
26- 27 I2 deg DEd Declination (J2000)
29- 30 I2 arcmin DEm Declination (J2000)
32- 35 F4.1 arcsec DEs Declination (J2000)
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Byte-by-byte Description of file: spectra.dat
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Bytes Format Units Label Explanations
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1- 12 F12.10 um lambda Wavelength in observer frame
14- 25 E12.6 W/m2/um HE0036 Spectrum of HE0036-5133
27- 38 E12.6 W/m2/um HE0045 Spectrum of HE0045-2145
40- 51 E12.6 W/m2/um HE0103 Spectrum of HE0103-5842
53- 64 E12.6 W/m2/um HE0119 Spectrum of HE0119-0118
66- 77 E12.6 W/m2/um HE0323 Spectrum of HE0323-4204
79- 90 E12.6 W/m2/um HE2112 Spectrum of HE2112-5926
92-103 E12.6 W/m2/um HE2128 Spectrum of HE2128-0221
105-116 E12.6 W/m2/um HE2129 Spectrum of HE2129-3356
118-129 E12.6 W/m2/um HE2204 Spectrum of HE2204-3249
131-142 E12.6 W/m2/um HE2211 Spectrum of HE2211-3903
144-155 E12.6 W/m2/um HE2221 Spectrum of HE2221-0221
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Acknowledgements:
Gerold Busch, busch(at)ph1.uni-koeln.de
I. Phys. Institut, Univ. of Cologne
References:
Busch et al., Paper I 2014A&A...561A.140B 2014A&A...561A.140B, Cat. J/A+A/561/A140
Busch et al., Paper II 2015A&A...575A.128B 2015A&A...575A.128B
Tremou et al., Paper III 2015A&A...580A.113T 2015A&A...580A.113T, Cat. J/A+A/580/A113
(End) G. Busch [I. Phys. Institut, Univ. Cologne], P. Vannier [CDS] 06-Nov-2015