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J/A+A/294/377 HS1700+6416 UV absorption (Vogel+, 1995)
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The ultraviolet absorption spectrum of the z=2.72 QSO HS 1700+6416. I. Results
on heavy-element absorption systems.
Vogel S., Reimers D.
<Astron. Astrophys. 294, 377 (1995)>
=1995A&A...294..377V (SIMBAD/NED Reference)
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ADC_Keywords: QSOs; Spectroscopy; Ultraviolet
Keywords: cosmology: observations - quasars: absorption lines -
quasars: individual HS 1700+6416 - galaxies: abundances
Abstract:
We present the analysis of ultraviolet and optical spectra of the bright,
high-redshift quasar HS 1700+6416. Ultraviolet observations in the range
from 1150 to 3280 A were obtained with the Faint Object Spectrograph (FOS)
onboard the Hubble Space Telescope (HST) at a resolution of R = 1300. The
identification of the numerous absorption lines provides evidence for 15
heavy-element absorption systems, among them 7 Lyman Limit systems (LLS)
clearly visible from their Lyman edges in the HST data. The entire
spectrum is a superposition of absorption lines by hydrogen, helium and
heavy-elements in 7 LLS, at least 8 heavy-element absorption systems and
the interstellar medium as well as Lyman lines arising in the more numerous
Ly-alpha clouds. Prominent absorption by several ionization stages of C,
N and O is detected in almost all heavy-element absorption systems when the
corresponding resonance lines fall in the observed wavelength range. The
blending problem as a result of the high absorption line density and the
low spectral resolution severely affects the quantitative analysis of the
data. In order to derive column densities a spectrum synthesis program has
been developed. Column densities measurements have been used to constrain
photoionization models in order to derive physical parameters of the
absorber systems. On the basis of our analysis, all heavy-element
absorption systems (with the exception of the system at z = 1.1572) show
enhanced oxygen and nitrogen abundances relative to carbon. No correlation
of any of the physical parameters with redshift is obvious, but the
relative oxygen overabundance (O/C) seem to increase with decreasing
carbon abundance (C/H). Normalized and calculated spectra along with the
line identifications are shown.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2 45 109 Resonance lines and atomic parameters ion
table3 90 304 Absorption lines for absorber systems
table4 123 27 Logarithmic column densities in metal line
systems
table5 130 15 *Observed and predicted column densities
table6 72 15 *Model parameters
table7 144 9 *Column densities for Si, S and Ne
table8 70 16 Interstellar absorption lines identified in
HS 1700+6416
tables.tex 114 989 LaTeX version of the tables
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Note on table5: The ionizing background is described by a power law with
alpha=-0.6 and a flux at the Lyman limit J=10^-22^Jy/sr
Note on table6: The ionizing background is assumed to be a power law alpha=-0.6
with a flux at the hydrogen Lyman limit J=10^-22^Jy/sr
[X/Y]=log(X/Y)_obs_-log(X/Y)_Sun
Note on table7: The ionizing radiation field is described by a power law with
alpha=-0.6 or -1 and J=10^-22^Jy/sr
Byte-by-byte Description of file: table2
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Bytes Format Units Label Explanations
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1- 7 A7 --- Ion Ion
14- 22 F9.4 0.1nm LamVac Vaccuum wavelength
24- 32 E9.2 --- log(gf) Oscillator strength
34- 42 E9.3 s-1 gamma Damping constant
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Byte-by-byte Description of file: table3
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Bytes Format Units Label Explanations
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1- 6 F6.4 --- z Redshift
8- 13 A6 --- Ion Ion
15- 22 F8.3 0.1nm LamVac Vacuum wavelength
24- 30 F7.2 0.1nm Lam(1+z) Vacuum wavelength times (1+z)
32- 38 F7.2 0.1nm LamObs []? Observed wavelength
40- 44 F5.2 0.1nm DLam []? LambdaObs-Lambda(1+z)
46- 48 F3.1 0.1nm FWHM []? Full width at half maximum
50- 53 F4.2 0.1pm WObs []? Observed equivalent width
56- 59 F4.2 0.1pm WFit []? Fitted equivalent width
60 A1 --- n_WFit [ n] Note on WFit, n = no line
63- 92 A30 --- Com Comment
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Byte-by-byte Description of file: table4
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Bytes Format Units Label Explanations
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2- 7 A6 --- Ion Ion
10 A1 --- l_log(N1) limit flag on column density N1
11- 14 F4.1 cm-2 log(N1) []? Column density at z_abs_=0.7217, b=30km/s (2)
15 A1 --- n_log(N1) Note on column density N1 (1)
17 A1 --- l_log(N2) limit flag on column density N2
18- 22 F5.2 cm-2 log(N2) []? Column density at z_abs_=0.8642, b=36km/s (2)
23 A1 --- n_log(N2) Note on column density N2 (1)
25 A1 --- l_log(N3) limit flag on column density N3
26- 30 F5.2 cm-2 log(N3) []? Column density at z_abs_=1.1572, b=42km/s (2)
31 A1 --- n_log(N3) Note on column density N3 (1)
33 A1 --- l_log(N4) limit flag on column density N4
34- 38 F5.2 cm-2 log(N4) []? Column density at z_abs_=1.3714, b=30km/s (2)
39 A1 --- n_log(N4) Note on column density N4 (1)
41 A1 --- l_log(N5) limit flag on column density N5
42- 45 F4.1 cm-2 log(N5) []? Column density at z_abs_=1.4735, b=30km/s (2)
46 A1 --- n_log(N5) Note on column density N5 (1)
48 A1 --- l_log(N6) limit flag on column density N6
49- 53 F5.2 cm-2 log(N6) []? Column density at z_abs_=1.725, b=30km/s (2)
54 A1 --- n_log(N6) Note on column density N6 (1)
56 A1 --- l_log(N7) limit flag on column density N7
57- 61 F5.2 cm-2 log(N7) []? Column density at z_abs_=1.8465, b=30km/s (2)
62 A1 --- n_log(N7) Note on column density N7 (1)
64 A1 --- l_log(N8) limit flag on column density N8
65- 69 F5.2 cm-2 log(N8) []? Column density at z_abs_=2.1678, b=25km/s (2)
70 A1 --- n_log(N8) Note on column density N8 (1)
72 A1 --- l_log(N9) limit flag on column density N9
73- 76 F4.1 cm-2 log(N9) []? Column density at z_abs_=2.189, b=30km/s (2)
77 A1 --- n_log(N9) Note on column density N9 (1)
79 A1 --- l_log(N10) limit flag on column density N10
80- 84 F5.2 cm-2 log(N10) []? Column density at z_abs_=2.290, b=30km/s (2)
85 A1 --- n_log(N10) Note on column density N10 (1)
87 A1 --- l_log(N11) limit flag on column density N11
88- 91 F4.1 cm-2 log(N11) []? Column density at z_abs_=2.308, b=30km/s (2)
92 A1 --- n_log(N11) Note on column density N11 (1)
94 A1 --- l_log(N12) limit flag on column density N12
95- 99 F5.2 cm-2 log(N12) []? Column density at z_abs_=2.315, b=30km/s (2)
100 A1 --- n_log(N12) Note on column density N12 (1)
102 A1 --- l_log(N13) limit flag on column density N13
103-106 F4.1 cm-2 log(N13) []? Column density at z_abs_=2.433, b=38km/s (2)
107 A1 --- n_log(N13) Note on column density N13 (1)
109 A1 --- l_log(N14) limit flag on column density N14
110-114 F5.2 cm-2 log(N14) []? Column density at z_abs_=2.439, b=25km/s (2)
115 A1 --- n_log(N14) Note on column density N14 (1)
117 A1 --- l_log(N15) limit flag on column density N15
118-122 F5.2 cm-2 log(N15) []? Column density at z_abs_=2.579, b=403km/s (2)
123 A1 --- n_log(N15) Note on column density N15 (1)
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Note (1): p: peak
o: outside considered range
e: Echelle
b: blend
l: wavelength shift
Note (2): b is the gas velocity dispersion parameter
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Byte-by-byte Description of file: table5
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Bytes Format Units Label Explanations
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1- 6 F6.4 --- z(abs) Absorption redshift
9- 13 F5.2 cm-2 log(N(HI))o Observed HI column density
14 A1 --- u_log(N(HI))o Uncertainty flag on N(HI)o
16- 17 I2 km/s b Gas velocity dispersion parameter
18 A1 --- u_b Uncertainty flag on b
20 A1 --- l_log(N(OIII))o Limit flag on N(OIII)o (1)
21- 24 F4.1 cm-2 log(N(OIII))o []? Observed OIII column density (2)
25 A1 --- n_log(N(OIII))o Note on N(OIII)o (3)
27 A1 --- l_log(N(OIV))o Limit flag on N(OIV)o (1)
28- 31 F4.1 cm-2 log(N(OIV))o []? Observed OIV column density (2)
32 A1 --- n_log(N(OIV))o Note on N(OIV)o (3)
34- 37 F4.1 cm-2 log(N(OV))o []? Observed OV column density (2)
38 A1 --- n_log(N(OV))o Note on N(OV)o (3)
40 A1 --- l_log(N(OVI))o Limit flag on N(OVI)o (1)
41- 44 F4.1 cm-2 log(N(OVI))o []? Observed OVI column density (2)
45 A1 --- n_log(N(OVI))o Note on N(OVI)o (3)
47 A1 --- l_log(N(NIII))o Limit flag on N(NIII)o (1)
48- 51 F4.1 cm-2 log(N(NIII))o Observed NIII column density
52 A1 --- n_log(N(NIII))o Note on N(NIII)o (3)
54 A1 --- l_log(N(NIV))o Limit flag on N(NIV)o (1)
55- 58 F4.1 cm-2 log(N(NIV))o []? Observed NIV column density (2)
59 A1 --- n_log(N(NIV))o Note on N(NIV)o (3)
61 A1 --- l_log(N(NV))o Limit flag on N(NV)o (1)
62- 65 F4.1 cm-2 log(N(NV))o []? Observed NV column density (2)
66 A1 --- n_log(N(NV))o Note on N(NV)o (3)
68 A1 --- l_log(N(CIII))o Limit flag on N(CIII)o (1)
69- 72 F4.1 cm-2 log(N(CIII))o []? Observed CIII column density (2)
73 A1 --- n_log(N(CIII))o Note on N(CIII)o (3)
75 A1 --- l_log(N(CIV))o Limit flag on N(CIV)o (1)
76- 79 F4.1 cm-2 log(N(CIV))o []? Observed CIV column density (2)
80 A1 --- n_log(N(CIV))o Note on N(CIV)o (3)
82- 85 F4.1 cm-2 log(N(HII))p Predicted HII column density
87- 90 F4.1 cm-2 log(N(OIII))p []? Predicted OIII column density
92- 95 F4.1 cm-2 log(N(OIV))p []? Predicted OIV column density
97-100 F4.1 cm-2 log(N(OV))p []? Predicted OV column density
102-105 F4.1 cm-2 log(N(OVI))p []? Predicted OVI column density
107-110 F4.1 cm-2 log(N(NIII))p Predicted NIII column density
112-115 F4.1 cm-2 log(N(NIV))p Predicted NIV column density
117-120 F4.1 cm-2 log(N(NV))p Predicted NV column density
122-125 F4.1 cm-2 log(N(CIII))p Predicted CIII column density
127-130 F4.1 cm-2 log(N(CIV))p Predicted CIV column density
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Note (1): Upper limits for column densities correspond to 3 sigmas upper limits.
Note (2): For missing ion column densities, the lines lie outside the observed
spectral range or they are difficult to measure due to large unknown
blends.
Note (3): +: Observed log(CII)=14.2 is reproduced by [C/H]=-0.52
*: Due to the poor signal-to noise of the Echelle data, these values
are highly uncertain
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Byte-by-byte Description of file: table6
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Bytes Format Units Label Explanations
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1- 6 F6.4 --- zabs Absorption redshift
8- 11 F4.1 cm-3 log(N(H)) Hydrogen column density
13- 17 F5.2 --- log(U) Ionization parameter
(ratio of the hydrogen-ionizing photon
density to the hydrogen density)
20- 23 F4.2 K log(T) Temperature
26- 29 F4.1 kpc Dc Distance
32- 34 F3.1 solMass log(Mc) Mass
36 A1 --- l_[C/H] Limit flag on [C/H]
37- 41 F5.2 --- [C/H] Carbon abundance
42 A1 --- n_[C/H] Less accurate value for [C/H]
44 A1 --- l_[N/H] Limit flag on [N/H]
45- 49 F5.2 --- [N/H] Nitrogen abundance
50 A1 --- n_[N/H] Less accurate value for [N/H]
51 A1 --- l_[O/H] Limit flag on [O/H]
52- 56 F5.2 --- [O/H] []? Oxygen abundance
57 A1 --- n_[O/H] Less accurate value for [O/H]
58 A1 --- l_[O/C] Limit flag on [O/C]
59- 63 F5.2 --- [O/C] []? Oxygen to carbon abundance ratio
64 A1 --- n_[O/C] Less accurate value for [O/C]
66 A1 --- l_[N/C] Limit flag on [N/C]
67- 71 F5.2 --- [N/C] []? Nitrogen to carbon abundance ratio
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Notes: Solar abundances taken from Gehren (1988). Masses were derived assuming
the clouds to be spherically symmetric.
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Byte-by-byte Description of file: table7
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Bytes Format Units Label Explanations
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1- 6 F6.4 --- z(abs) Absorption redshift
7 A1 --- l_log(N(SiII))o Limit flag on N(SiII)o
8- 11 F4.1 cm-2 log(N(SiII))o []? Observed SiII column density
12 A1 --- n_log(N(SiII))o [ebl ] Note on N(SiII)o
14- 17 F4.1 cm-2 log(N(SiIII))o []? Observed SiIII column density
18 A1 --- n_log(N(SiIII))o [ebl ] Note on N(SiIII)o (1)
20 A1 --- l_log(N(SiIV))o Limit flag on N(SiIV)o
21- 24 F4.1 cm-2 log(N(SiIV))o []? Observed SiIV column density
25 A1 --- n_log(N(SiIV))o [ebl ] Note on N(SiIV)o (1)
27 A1 --- l_log(N(SIII))o Limit flag on N(SIII)o
28- 31 F4.1 cm-2 log(N(SIII))o []? Observed SIII column density
32 A1 --- n_log(N(SIII))o [ebl ] Note on N(SIII)o (1)
34 A1 --- l_log(N(SIV))o Limit flag on N(SVI)o
35- 38 F4.1 cm-2 log(N(SIV))o Observed SIV column density
40 A1 --- l_log(N(SV))o Limit flag on N(SV)o
41- 44 F4.1 cm-2 log(N(SV))o []? Observed SV column density
45 A1 --- n_log(N(SV))o [ebl ] Note on N(SV)o (1)
47 A1 --- l_log(N(SVI))o Limit flag on N(SVI)o
48- 51 F4.1 cm-2 log(N(SVI))o []? Observed SVI column density
52 A1 --- n_log(N(SVI))o [ebl ] Note on N(SVI)o (1)
54- 57 F4.1 cm-2 log(N(NeV))o []? Observed NeV column density
60- 63 F4.1 cm-2 log(N(NeVI))o []? Observed NeVI column density
64 A1 --- n_log(N(NeVI))o [ebl ] Note on N(NeVI)o (1)
66 A1 --- l_log(N(NeVIII))o Limit flag on N(NeVIIII)o
67- 70 F4.1 cm-2 log(N(NeVIII))o []? Observed NeVIII column density
72- 75 F4.1 ---- alpha Power law index alpha
77- 80 F4.1 cm-2 log(N(SiII))p Predicted SiII column density
82- 85 F4.1 cm-2 log(N(SiIII))p Predicted SiIII column density
87- 90 F4.1 cm-2 log(N(SiIV))p Predicted SiIV column density
92- 95 F4.1 cm-2 log(N(SIII))p Predicted SIII column density
97-100 F4.1 cm-2 log(N(SIV))p Predicted SIV column density
102-105 F4.1 cm-2 log(N(SV))p Predicted SV column density
107-110 F4.1 cm-2 log(N(SVI))p Predicted SVI column density
112-115 F4.1 cm-2 log(N(NeV))p []? Predicted NeV column density
117-120 F4.1 cm-2 log(N(NeVI))p []? Predicted NeVI column density
122-125 F4.1 cm-2 log(N(NeVIII))p []? Predicted NeVIII column density
127 A1 --- l_[Si/H] limit flag on [Si/H]
128-131 F4.1 --- [Si/H] []? Predicted Si abundance
133 A1 --- l_[S/H] limit flag on [S/H]
134-137 F4.1 --- [S/H] []? Predicted S abundance
139-142 F4.1 --- [Ne/H] []? Predicted Ne abundance
143 A1 --- u_[Ne/H] Uncertainty flag on [Ne/H]
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Note (1): Solar Ne abundance from Grevesse: log(Ne/H)=-3.9, Gehren: -4.2.
e : Echelle data
b : blend
l : {lambda}-shift
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Byte-by-byte Description of file: table8
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Bytes Format Units Label Explanations
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1- 5 A5 --- Ion Ion
9- 15 F7.2 0.1nm Lam Wavelength
17- 23 F7.2 0.1nm LamObs []? Observed wavelength
25- 29 F5.2 0.1nm DLam []? Difference LambdaObs - Lambda
32- 35 F4.2 0.1nm Wmin Detection limit (1)
38 A1 --- l_log(N) Limit flag on log(N)
39- 42 F4.1 cm-2 log(N) []? Column density N of the specified ion
46- 47 I2 km/s b []? Gas velocity dispersion parameter
52- 55 F4.2 0.1nm EW1 HS 1700 equivalent width
59- 62 F4.2 0.1nm EW2 []? H 1821+643 equivalent width
66- 69 F4.2 0.1nm EW3 []? 3C 351 equivalent width
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Note (1): For unresolved lines the instrumental FWHM divided by the strongly
wavelength dependent signal-to-noise yields the observed 1sigma
equivalent width limit as a function of wavelength. Values given in
the table therefore correspond to 3 times the observed 1sigma
equivalent width limits.
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(End) Patricia Bauer [CDS] 22-Sep-1994