J/ApJ/649/L61 SDSS J155810.16-003120.0 abundances (O'Meara+, 2006)
The deuterium-to-hydrogen abundance ratio toward the
QSO SDSS J155810.16-003120.0.
O'Meara J.M., Burles S., Prochaska J.X., Prochter G.E., Bernstein R.A.,
Burgess K.M.
<Astrophys. J., 649, L61-L65 (2006)>
=2006ApJ...649L..61O 2006ApJ...649L..61O
ADC_Keywords: QSOs ; Abundances, peculiar
Keywords: cosmology: observations - quasars: absorption lines -
quasars: individual (SDSS J155810.16-003120.0)
Abstract:
We present a measurement of the D/H abundance ratio in a metal-poor
damped Lyα(DLA) system along the sight line of QSO SDSS 1558-0031.
Description:
We have obtained two high-resolution spectra of the z=2.83 quasar
SDSS 1558-0031 using two different spectrographs, the MIKE echelle
spectrograph on the 6.5m Magellan Clay telescope at Las Campanas, and
the upgraded HIRES spectrometer on the 10m Keck I telescope on Mauna
Kea.
The MIKE spectrum was obtained on 2004 May 10 and covers the spectral
range 3221-7420Å, with an exposure time of 3600s.
The HIRES spectrum was taken on 2006 April 11 and covers the spectral
range 3338-6200Å, with an exposure time of 4100s.
Objects:
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RA (2000) DE Designation(s)
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15 58 10.16 -00 31 20.0 SDSS J155810.16-003120.0 = QSO B1555-0022
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 89 14 Ions observed in the z=2.70262 DLA towards
SDSS1558-0031
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See also:
II/282 : The SDSS Photometric Catalog, Release 6 (Adelman-McCarthy+, 2007)
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Ion Ion name
8 A1 --- l_logN Limit flag on LogN
9- 13 F5.2 cm-2 logN Log of the column density
15- 18 F4.2 cm-2 e_logN ? Error in logN from VPFIT along
20 A1 --- f_logN [cd] Flag on logN (1)
22- 26 F5.2 km/s b ? Velocity width
28- 31 F4.2 km/s e_b ? Error in b
33- 40 F8.6 --- z Redshift
42- 49 F8.6 --- e_z Error in z
51 A1 --- l_[X/H] Limit flag on [X/H]
52- 56 F5.2 [-] [X/H] ? Log of the ion number abundance (2)
58- 89 A32 0.1nm Trans Transition(s) in Angstroms
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Note (1): Flag on logN as follows:
c = See text for detailed description of the values and errors for this ion.
d = Column density measurement from the apparent optical depth method.
Note (2): Where [X/H]=log(X/HI)-log(X/H)solar and we have considered only
low-ion transitions and have not adopted ionization or depletion
corrections.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 18-Jul-2008