J/MNRAS/509/2377 Narrow-Line Seyfert 1 IR Survey (Durre+, 2022)
The southern hemisphere narrow-line Seyfert 1 infrared survey.
Durre M., Mould J.
<Mon. Not. R. Astron. Soc. 509, 2377 (2022)>
=2022MNRAS.509.2377D 2022MNRAS.509.2377D (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, Seyfert ; Galaxies, spectra ; Galaxies, IR ;
Galaxy catalogs
Keywords: galaxies: active - galaxies: Seyfert
Abstract:
We present a near-infrared spectroscopic survey of narrow-line Seyfert
1 galaxies in the southern hemisphere (using the SOFI instrument on
the ESO-NTT telescope), sampled from optical surveys. We examine the
kinematics of the broad-line region, probed by the emission line width
of hydrogen (Paschenα and Hβ). We observed 57 objects, of
which we could firmly measure Paschenα in 49 cases. We find that
a single Lorentzian fit (preferred on theoretical grounds) is
preferred over multi-component Gaussian fits to the line profiles; a
lack of narrow-line region emission, overwhelmed by the pole-on view
of the broad line region (BLR) light, supports this. We recompute the
catalog black hole (BH) mass estimates, using the values of FWHM and
luminosity of Hβ, both from catalog values and re-fitted
Lorentzian values. We find a relationship slope greater than unity
compared to the catalog values. We ascribe this to contamination by
galactic light or difficulties with line flux measurements. However,
the comparison of masses computed by the fitted Lorentzian and
Gaussian measurements show a slope close to unity. Comparing the BH
masses estimated from both Paschenα and Hβ, the line widths
and fluxes shows deviations from expected; in general, however, the
computed BH masses are comparable. We posit a scenario where an
intermixture of dusty and dust-free clouds (or alternately a
structured atmosphere) differentially absorbs the line radiation of
the BLR, due to dust absorption and hydrogen bound-free absorption.
Description:
We observed a sub-sample of these galaxies with the SofI (Son of
ISAAC) NIR spectrometer at the Nasmyth A focus of the ESO 3.5-m New
Technology Telescope (NTT) at the European Southern Observatory (ESO)
in La Silla (Chile), in the program 0103.B-0504(B) (observation dates
25-27 August 2019). To maximize efficiency, our observing strategy was
to prioritize objects based on a figure of merit, which selected both
on 2MASS Ks magnitude (with sample range of 10.9-17.4mag, Skrutskie et
al., 2006AJ....131.1163S 2006AJ....131.1163S, Cat. VII/233) and on total Hβ flux
(from 1.4-590x10-15erg/s) as taken from the C18 (Chen at al.,
2018A&A...615A.167C 2018A&A...615A.167C, Cat. J/A+A/615/A167) and S18 (Schmidt et al.,
2018A&A...615A..13S 2018A&A...615A..13S, Cat. J/A+A/615/A13) catalogues, i.e. we selected
both bright galaxies and strong emission lines.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 110 57 Observation Log (08/08/2022 version)
tablea2.dat 164 49 Paα and Hβ emission line measurements,
extinctions and black hole mass estimates
list.dat 159 57 List of fits spectra
fits/* . 57 Individual fits spectra
lineprofiles.pdf 512 979 Line profiles
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See also:
J/A+A/615/A13 : Narrow line Seyfert 1 (NLS1) galaxies spectra (Schmidt+, 2018)
J/A+A/615/A167 : Catalog of NLS1s galaxies in 6dFGS survey (Chen+, 2018)
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 22 A22 --- Name Target ID
24- 46 A23 --- AName Alternate ID
48- 56 F9.5 deg RAdeg Right ascension (J2000)
58- 66 F9.5 deg DEdeg Declination (J2000)
68- 72 F5.2 mag Kmag K magnitude
74- 79 F6.4 --- z Redshift
81- 84 I4 Mpc Ldist Luminosity distance
86- 90 F5.3 mag E(B-V) MW B-V extinction
92 I1 --- Cycles Observations cycles (each of 600s)
94-102 A9 --- Std-Star Telluric/calibration star ID
104-105 I2 d Obs.Date Observation date
107-110 F4.1 --- S/N Spectrum signal to noise estimate
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 22 A22 --- Name Target ID
24- 29 F6.2 10-18W/m2 PaFlux Flux Paα (in 10-15erg/cm2/s unit)
31- 36 F6.2 10-18W/m2 e_PaFlux Flux uncertainty Paα
(in 10-15erg/cm2/s unit)
38- 42 F5.2 nm PaFWHM FWHM Paα
44- 47 F4.2 nm e_PaFWHM FWHM uncertainty Paα
49- 53 F5.2 [10-7W] logLPa Log luminosity Paα (erg/s)
55- 58 F4.2 [10-7W] e_logLPa Log luminosity uncertainty Paα
(erg/s)
60- 66 F7.2 km/s PaV FWHM Paα velocity
68- 72 F5.2 km/s e_PaV FWHM uncertainty Paα velocity
74- 77 F4.2 [Msun] logMBHPa Log mass of central black hole from
Paα
79- 82 F4.2 [Msun] e_logMBHPa Log mass of central black hole from
Paα uncertainty
84- 88 F5.2 mag PaE(B-V) Extinction derived from Paα/Hβ
90- 93 F4.2 mag e_PaE(B-V) Extinction derived from Paα/Hβ
uncertainty
95-100 F6.2 10-18W/m2 HbFlux Flux Hβ (in 10-15erg/cm2/s unit)
102-106 F5.2 10-18W/m2 e_HbFlux Flux uncertainty Hβ
(in 10-15erg/cm2/s unit)
108-112 F5.2 nm HbFWHM FWHM Hβ
114-117 F4.2 nm e_HbFWHM FWHM uncertainty Hβ
119-123 F5.2 [10-7W] logLHb Log luminosity Hβ (erg/s)
125-128 F4.2 [10-7W] e_logLHb Log luminosity uncertainty Hβ (erg/s)
130-136 F7.2 km/s HbV FWHM Hβ velocity
138-143 F6.2 km/s e_HbV FWHM uncertainty Hβ velocity
145-148 F4.2 [Msun] logMBHHb Log mass of central black hole from Hβ
150-153 F4.2 [Msun] e_logMBHHb Log mass of central black hole from Hβ
uncertainty
155-159 F5.2 mag HbE(B-V) ? Extinction derived from Hα/Hβ
161-164 F4.2 mag e_HbE(B-V) ? Extinction derived from Hα/Hβ
uncertainty
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 22 A22 --- Name Target ID
24- 32 F9.5 deg RAdeg Right Ascension of center (J2000)
33- 41 F9.5 deg DEdeg Declination of center (J2000)
43- 46 I4 --- Nx Number of pixels along X-axis
48- 71 A24 "datime" Obs.date Observation date
73- 79 F7.2 0.1nm bWAVE Lower value of wavelength interval
81- 87 F7.2 0.1nm BWAVE Upper value of wavelength interval
89- 96 F8.6 0.1nm dWAVE Wavelength resolution
98- 99 I2 Kibyte size Size of FITS file
101-127 A27 --- FileName Name of FITS file, in subdirectory fits
129-159 A31 --- Title Title of the FITS file
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Acknowledgements:
Mark Durre, mdurre(at)swin.edu.au
History:
24-Nov-2021: on-line version
08-Aug-2022: corrected tablea1
(End) Patricia Vannier [CDS] 07-Oct-2021