J/MNRAS/335/555 Lyman-alpha forest of 5 QSOs (Kim+, 2002)
The physical properties of the Lyα forest at z > 1.5 .
Kim T.-S., Carswell R.F., Cristiani S., D'odorico S., Giallongo E.
<Mon. Not. R. Astron. Soc., 335, 555-573 (2002)>
=2002MNRAS.335..555K 2002MNRAS.335..555K
ADC_Keywords: QSOs
Keywords: quasars: absorption lines
Abstract:
Combining a new, increased data set of eight quasi-stellar objects
(QSOs) covering the Lyα forest at redshifts 1.5<z<3.6 from
VLT/UVES observations with previously published results, we have
investigated the properties of the Lyα forest at 1.5<z<4. With
the six QSOs covering the Lyα forest at 1.5<z<2.5, we have
extended previous studies in this redshift range. In particular, we
have concentrated on the evolution of the line number density and the
clustering of the Lyα forest at z≤2.5, where the Lyα
forest starts to show some inhomogeneity from sightline to sightline.
We have fitted Voigt profiles to the Lyα absorption lines as in
previous studies, and have, for two QSOs with zem∼2.4, fitted
Lyα and higher order of Lyman lines down to 3050Å
simultaneously. This latter approach has been taken in order to study
the Lyβ forest at z∼2.2 and the higher H I column density
Lyα forest in the Lyβ forest region.
Description:
Table 1 lists the observation log for the QSOs observed with the
VLT/UVES. In addition to HE0515-4414, J2233-606 and HE2217-2818 from
Kim et al. (2001, Cat. J/A+A/373/757, KCD), we have included five
more QSOs. Note that we extended the wavelength coverage for the Ly
forest towards J2233-606 and HE2217-2818 in this study compared with
those from KCD. The spectra were reduced with MIDAS/UVES and the
resolution is about R∼45000.
Objects:
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RA (2000) DE Designation(s) (file)
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05 17 07.6 -44 10 56 HE0515-4414 = QSO B0515-4414
11 24 42.9 -17 05 17 HE1122-1648 = QSO B1122-168 (q1122.dat)
13 50 38.9 -25 12 17 HE1347-2457 = QSO B1347-2457 (q1347.dat)
22 20 06.8 -28 03 23 HE2217-2818 = QSO J2220-2803
22 33 37.6 -60 33 29 J2233-606 = QSO J2233-606
00 57 58.0 -26 43 15 Q0055-269 = QSO B0055-26 (q0055.dat)
03 04 49.9 -00 08 13 Q0302-003 = QSO B0302-003 (q0302.dat)
11 03 25.3 -26 45 16 Q1101-264 = QSO B1100-264 (q1101.dat)
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 92 12 Observation log
q0055.dat 64 575 Fitted line list for Q0055-269
q0302.dat 64 231 Fitted line list for Q0302-003
q1101.dat 64 430 Fitted line list for Q1101-264
q1122.dat 83 428 Fitted line list for HE1122-1648
q1347.dat 64 460 Fitted line list for HE1347-2457
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See also:
J/A+A/373/757 : Lyman-Alpha Forest of 3 QSOs (Kim+, 2001)
J/ApJ/524/536 : Nearby Lyα quasar absorbers (Impey+, 1999)
J/other/PASA/19.455 : Damped Lyman alpha absorption of QSOs (Curran+, 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- QSO QSO name
13- 14 I2 h RAh Right Ascension J2000 (hours) (2)
16- 17 I2 min RAm Right Ascension J2000 (minutes) (2)
19- 22 F4.1 s RAs Right Ascension J2000 (seconds) (2)
24 A1 --- DE- Declination J2000 (sign) (2)
25- 26 I2 deg DEd Declination J2000 (degrees) (2)
28- 29 I2 arcmin DEm Declination J2000 (minutes) (2)
31- 32 I2 arcsec DEs Declination J2000 (seconds) (2)
34- 37 F4.1 mag Bmag B magnitude (1)
39- 43 F5.3 --- zem Emission redshift
45- 48 I4 0.1nm LambdaL Lower value of wavelength interval
49 A1 --- --- [-]
50- 53 I4 0.1nm LambdaU Upper value of wavelength interval
55- 59 I5 s ExpTime Exposition time
61- 81 A21 --- Date Observation date
84- 92 A9 --- File Name of file containing the line list.
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Note (1): B magnitude, Taken from the SIMBAD astronomical data base.
The magnitude of HE1347-2457 is from NED.
Note (2): Not in the original table.
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Byte-by-byte Description of file: q*.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- Line Line number (1)
5- 12 F8.3 0.1nm Lambda Vacuum wavelength
14- 25 A12 --- Ion Line identification
27- 34 F8.5 --- z Redshift of the line
36- 41 F6.2 km/s b Doppler parameter (b-parameter)
43- 48 F6.2 km/s e_b rms uncertainty on b
50- 55 F6.3 [cm-2] log(NHI) Logarithmic value of HI column density
57- 61 F5.3 [cm-2] e_log(NHI) rms uncertainty on log(NHI)
63- 83 A21 --- Com Comment
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Note (1): All the weak transitions of metal lines are fully taken into
account when they fall in the hydrogen lines, although not all the
weak transitions of metal lines are not listed in the table.
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Acknowledgements: Tae-Sun Kim, tkim(at)eso.org
(End) Patricia Vannier [CDS] 08-Nov-2004