J/A+A/639/A5 X-ray absorption in INTEGRAL AGN (Malizia+, 2020)
X-ray absorption in INTEGRAL active galactic nuclei. Host galaxy inclination.
Malizia A., Bassani L., Stephen J.B., Bazzano A., Ubertini P.
<Astron. Astrophys. 639, A5 (2020)>
=2020A&A...639A...5M 2020A&A...639A...5M (SIMBAD/NED BibCode)
ADC_Keywords: X-ray sources ; Galaxies, Seyfert ; X-ray sources ; Morphology
Keywords: X-ray: galaxies - galaxies: active - galaxies: Seyfert
Abstract:
In this work the INTEGRAL hard X-ray selected sample of AGN has been
used to investigate the possible contribution of absorbing material
distributed within the host galaxies to the total amount of NH
measured in the X-ray band. We collected all the available axial ratio
measurements of the galaxies hosting our AGN together with their
morphological information and find that also for our hard X-ray
selected sample a deficit of edge-on galaxies hosting type 1 AGN is
present. We estimate that in our hard X-ray selected sample there is a
deficit of 24% (±5%) of type 1 AGN. Possible bias in redshift has
been excluded, as we found the same effect in a well determined range
of z where the number and the distributions of the two classes are
statistically the same. Our findings clearly indicate that material
located in the host galaxy on scales of hundreds of parsecs and not
aligned with the putative absorbing torus of the AGN can contribute to
the total amount of column density. This galactic absorber can be
large enough to hide the broad line region of some type 1 AGN causing
their classification as type 2 objects and giving rise to the
deficiency of type 1 in edge-on galaxies.
Description:
INTEGRAL hard X-ray selected sample of active galactic nuclei (AGN)
has been used to investigate the possible contribution of absorbing
material distributed within the host galaxies to the total amount of
NH measured in the X-ray band.
Parameters used in the work: redshift, class, X-ray column density of
INTEGRAL AGN and axial ratios and morphology of their host galaxies.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 59 333 INTEGRAL/IBIS AGN
tablea2.dat 109 33 INTEGRAL/IBIS AGN, new AGN from
Mereminsky al., 2016, Cat. J/MNRAS/459/140
tablea3.dat 88 10 INTEGRAL/IBIS AGN, new AGN from
Krivonos et al., 2017, Cat. J/MNRAS/470/512
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See also:
J/MNRAS/426/1750 : INTEGRAL/IBIS AGN catalogue (Malizia+, 2012)
J/MNRAS/460/19 : Update of INTEGRAL/IBIS AGN catalogue (Malizia+, 2016)
J/MNRAS/459/140 : M81, LMC and 3C 273/Coma 17-60keV obs. (Mereminskiy+, 2016)
J/MNRAS/470/512 : INTEGRAL 14-year Gal. hard X-ray sources (Krivonos+ 2017)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- Name Source Name
22- 28 F7.5 --- z ?=9.999 Redshift
30- 40 A11 --- Class Optical class
41 A1 --- l_logNH Limit flag on logNH
42- 46 F5.2 [cm-2] logNH H column density measured in the X-ray band
50- 53 F4.2 --- b/a ? Axial ratio
55- 59 A5 --- MType Morphological class
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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- 17 A17 --- Name Source Name
18 A1 --- n_Name [ab] Note on Name (1)
21- 22 I2 h RAh Right Ascension (J2000.0)
24- 25 I2 min RAm Right Ascension (J2000.0)
27- 31 F5.2 s RAs Right Ascension (J2000.0)
33 A1 --- DE- Declination sign (J2000.0)
34- 35 I2 deg DEd Declination (J2000.0)
37- 38 I2 arcmin DEm Declination (J2000.0)
40- 43 F4.1 arcsec DEs Declination (J2000.0
45- 51 F7.5 --- z Redshift
53- 63 A11 --- Class optical class
65 A1 --- l_logNH Limit flag on logNH
66- 70 F5.2 [cm-2] logNH log value of H column density measured in
the X-ray band, or lower limit if interval
71 A1 --- --- [-]
72- 73 I2 [cm-2] logNHu ? Upper value of H column density measured
in the X-ray band interval
75- 78 F4.2 --- gamma Photon index for 2-10keV band
79 A1 --- n_gamma [f] f for fixed gamma value
80- 83 F4.2 --- e_gamma Error on gamma
85- 88 F4.2 10-15W/m2 F2-10 2-10keV flux value or lower value if
interval (in 10-12erg/cm2/s unit)
89 A1 --- --- [-]
90- 91 I2 10-15W/m2 F2-10u ? Upper value of 2-10keV flux when interval
(in 10-12erg/cm2/s unit)
93- 97 F5.2 10-15W/m2 F20-100 20-100 keV flux (in 10-12erg/cm2/s unit)
99-102 F4.2 --- b/a ?=9.99 Axial ratio
104-106 A3 --- Mtype Morphological class
108-109 I2 --- Ref Reference code (2)
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Note (1): Note as follows:
a = highly variable source both in flux and spectral shape
(see Di Gesu et al., 2014A&A...563A..95D 2014A&A...563A..95D)
b = blended source Sy2 (CGCG 291-028) and QSO, in table values referred to
the Sy2 only (not included in the analysis)
Note (2): References as follows:
1 = Ricci et al. (2017, Cat. J/ApJS/233/17)
2 = Di Gesu et al. (2014A&A...563A..95D 2014A&A...563A..95D)
3 = this work
4 = Brightman & Nandra (2011, Cat. J/MNRAS/413/1206)
5 = Oda et al. (2017ApJ...835..179O 2017ApJ...835..179O)
6 = Vasudevan et al. (2013, Cat. J/ApJ/763/111)
7 = Patrick et al. (2012, Cat. J/MNRAS/426/2522)
8 = Miniutti et al. (2010MNRAS.401.1315M 2010MNRAS.401.1315M)
9 = Gonzalez-Martin et al. (2006A&A...460...45G 2006A&A...460...45G)
10 = Cappi et al. (2006A&A...446..459C 2006A&A...446..459C)
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Source name
16- 17 I2 h RAh Right Ascension (J2000.0)
19- 20 I2 min RAm Right Ascension (J2000.0)
22- 26 F5.2 s RAs Right Ascension (J2000.0)
28 A1 --- DE- Declination sign (J2000.0)
29- 30 I2 deg DEd Declination (J2000.0)
32- 33 I2 arcmin DEm Declination (J2000.0)
35- 38 F4.1 arcsec DEs Declination (J2000.0)
40- 45 F6.4 --- z Redshift
47- 51 A5 --- Class Optical class
53- 57 F5.2 [cm-2] logNH log values of X-ray column density
59- 62 F4.2 --- gamma Photon index
64- 67 F4.2 --- e_gamma Error on photon index
69- 72 F4.1 10-15W/m2 F2-10 2-10 keV flux (in 10-12erg/cm2/s unit)
74- 78 F5.2 10-15W/m2 F20-100 20-100 keV flux (in 10-12erg/cm2/s unit)
80- 83 F4.2 --- b/a ?=9.99 Axial ratio
85- 86 A2 --- Mtype Morphological class
88 I1 --- Ref [1/3] Reference code (1)
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Note (1): References as follows:
1 = Ricci et al. (2017, Cat. J/ApJS/233/17)
3 = this work
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Acknowledgements:
Angela Malizia, angela.malizia(at)inaf.it
(End) Patricia Vannier [CDS] 20-May-2020