J/ApJ/683/L115 Intermediate-line region in quasars (Hu+, 2008)
Hβ profiles in quasars: evidence for an intermediate-line region.
Hu C., Wang J.-M., Ho L.C., Chen Y.-M., Bian W.-H., Xue S.-J.
<Astrophys. J., 683, L115-L118 (2008)>
=2008ApJ...683L.115H 2008ApJ...683L.115H
ADC_Keywords: Equivalent widths ; Line Profiles ; Redshifts ; QSOs
Keywords: galaxies: nuclei - galaxies: Seyfert - line: profiles -
quasars: emission lines - quasars: general
Abstract:
We report on a systematic investigation of the Hβ and FeII
emission lines in a sample of 568 quasars within z<0.8 selected from
the Sloan Digital Sky Survey quasar catalog (DR5, Cat. VII/252). The
conventional broad Hβ emission line can be decomposed into two
components: one with intermediate velocity width and another with
very broad width. The velocity shift and equivalent width of the
intermediate-width component do not correlate with those of the very
broad component of Hβ, but its velocity shift and width do
resemble FeII. Moreover, the width of the very broad component is
roughly 2.5 times that of the intermediate-width component. These
characteristics strongly suggest the existence of an intermediate-line
region, whose kinematics seem to be dominated by infall, located at
the outer portion of the broad-line region.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 145 568 Line measurements
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See also:
VII/260 : The SDSS-DR7 quasar catalog (Schneider+, 2010)
J/ApJ/674/668 : SDSS J102839.11+450009.4 Fe II emission lines (Wang+, 2008)
J/ApJ/687/78 : FeII emission in quasars (Hu+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- SDSS SDSS DR5 designation (HHMMSS.ss+DDMMSS.s)
20- 24 F5.3 --- z Redshift determined using the peak
of [OIII]5007
26- 30 F5.1 0.1nm EW(Fe) EW of FeII lines between 4434 & 4686Å (1)
32- 34 F3.1 0.1nm e_EW(Fe) Error in EW(Fe) (1)
36- 41 F6.1 km/s W(Fe) FeII FWHM
43- 48 F6.1 km/s e_W(Fe) Error in W(Fe)
50- 56 F7.1 km/s v(Fe) FeII velocity shift with respect
to [OIII]5007 (2)
58- 62 F5.1 km/s e_v(Fe) Error in v(Fe)
64- 67 F4.1 0.1nm EW(HbI) EW of Hβ intermediate-width component (1)
69- 72 F4.1 0.1nm e_EW(HbI) Error in EW(HbIC) (1)
74- 79 F6.1 km/s W(HbI) FWHM of Hβ intermediate-width component
81- 85 F5.1 km/s e_W(HbI) Error in W(HbIC)
87- 93 F7.1 km/s v(HbI) Hβ intermediate-width component
velocity shift (2)
95- 99 F5.1 km/s e_v(HbI) Error in v(HbIC)
101-105 F5.1 0.1nm EW(HbVB) EW of Hβ very broad component (1)
107-110 F4.1 0.1nm e_EW(HbVB) Error in EW(HbVBC) (1)
112-118 F7.1 km/s W(HbVB) FWHM of Hβ very broad component
120-125 F6.1 km/s e_W(HbVB) Error in W(HbVBC)
127-133 F7.1 km/s v(HbVB) Hβ very broad component velocity
shift (2)
135-139 F5.1 km/s e_v(HbVB) Error in v(HbVBC)
141-145 F5.3 --- chi2 Reduced χ2 in the double-Gaussian model
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Note (1): In units of Angstroms. All EW measurements refer to the continuum
at 5100Å.
Note (2): Positive velocity indicates a redward shift.
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History:
From electronic version of the journal
References:
Hu et al. Paper I. 2008ApJ...687...78H 2008ApJ...687...78H Cat J/ApJ/687/78.
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 25-Nov-2010