J/ApJS/94/127 Distribution of H I in the ISM. I. (Fruscione+, 1994)
The distribution of neutral hydrogen in the interstellar medium. I. The data.
Fruscione A., Hawkins I., Jelinsky P., Wiercigroch A.
<Astrophys. J. Suppl. Ser. 94, 127 (1994)>
=1994ApJS...94..127F 1994ApJS...94..127F
ADC_Keywords: Interstellar medium ; H I data ; Abundances
Keywords: astronomical databases: miscellaneous - catalogs - ISM: abundances
Abstract:
We compile, from the existing literature, the largest sample to date
(842 data points) of hydrogen column density measurements, N(HI), of
the gas in the interstellar medium. We include only results obtained
from absorption measurements toward individual stars (594 in our
sample) in an effort to construct a three-dimensional picture of the
interstellar gas. We derive hydrogen column densities toward a
fraction of the stars in the sample from published column density
measurements of metal ions. A three-dimensional physical model derived
from this data set will be presented in a companion paper. The
observed stars span distances from a few parsecs to a few thousand
parsecs, and more than half of the sample serves to describe the local
interstellar medium within a few hundred parsecs of the Sun. Hydrogen
column densities range from 1017 to 1022cm-2. We describe here
the various observational methods used to estimate the hydrogen column
densities and present the table with the stellar and hydrogen column
density data. The provided table is intended as a global reference
work, not to introduce new results.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 130 842 Stellar data and interstellar hydrogen
column densities
refs.dat 150 69 References
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See also:
VIII/54 : Atlas of Galactic Neutral Hydrogen (Hartmann+, 1997)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000.0) (1)
4- 5 I2 min RAm Right ascension (J2000.0) (1)
7- 10 F4.1 s RAs Right ascension (J2000.0) (1)
12 A1 --- DE- Declination sign (J2000.0) (1)
13- 14 I2 deg DEd Declination (J2000.0) (1)
16- 17 I2 arcmin DEm Declination (J2000.0) (1)
19- 20 I2 arcsec DEs Declination (J2000.0) (1)
21 A1 --- n_DEs [q] q: Coordinates from Pounds et al.,
1993, Cat. J/MNRAS/260/77
23- 32 A10 --- HD HD (Cat. III/135) designation (1)
34- 47 A14 --- Name Name (1)
49- 60 A12 --- SpType MK spectral type (1)
61 A1 --- n_SpType [r] r: SpType from Barstow et al. (2)
63- 67 F5.1 deg GLON Galactic longitude (1)
69- 73 F5.1 deg GLAT Galactic latitude (1)
75- 79 F5.2 mag Vmag V magnitude (1)
80 A1 --- n_Vmag [r] r: Vmag from Barstow et al. (2)
82 A1 --- l_E(B-V) Limit flag on E(B-V)
83- 87 F5.2 mag E(B-V) ? Colour excess
89- 96 F8.2 pc Dist ? Distance
97 A1 --- n_Dist [PWYklmnr] Note on Dist (3)
99 A1 --- l_logNHI Limit flag on logNHI
100-105 F6.3 [cm-2] logNHI HI column density
106 A1 --- n_logNHI [Nij] Note on logNHI (4)
108-111 F4.2 [cm-2] e_logNHI ? rms uncertainty on logNHI if found in the
reference
112 A1 --- nelogNHI [h] Note on e_logNHI (5)
113 A1 --- l_logNH2 Limit flag on logNH2
114-118 F5.2 [cm-2] logNH2 ? H2 column density
119 A1 --- n_logNH2 [g] Note on logNH2 (6)
121-127 A7 --- Meth Method used (7)
129-130 I2 --- Ref Reference code for E(B-V), Dist, logNHI,
logNH2, unless otherwise noted,
in refs.dat file
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Note (1): Data are from SIMBAD
Note (2): Barstow et al., 1993MNRAS.264...16B 1993MNRAS.264...16B and
1993, Adv. Space Res., 13 (12), 281
Note (3): Notes on Distance as follows:
P = Distance from Welsh, Vedder, & Vallerga, 1990ApJ...358..473W 1990ApJ...358..473W
W = Distance from Finley, Koester, & Basri, 1994, in prep.
Y = Distance from van Altena et al., 1991, The general catalogue
of Trigonometric Stellar parallaxes (New Haven: Yale Univ. Obs.),
(Cat. I/174)
k = Distance from Frisch & York 1991, in Extreme Ultraviolet
Astronomy, ed. R.F. Malina & S. Bowyer (New York: Pergamon), 322
l = Distance from Kahn et al., 1984ApJ...278..255K 1984ApJ...278..255K
m = Distance from Bruhweiler & Kondo, 1982ApJ...259..232B 1982ApJ...259..232B
n = Distance from Paerels & Heise, 1989ApJ...339.1000P 1989ApJ...339.1000P
r = Data from Barstow et al., 1993MNRAS.264...16B 1993MNRAS.264...16B and
1993, Adv. Space Res., 13 (12), 281
Note (4): Notes on logNHI as follows:
N = N(HI) derived from n(HI) (cm-3) from reference in Ref and
from distance in Dist
i = N(HI) derived from N(MgII) assuming log[N(MgII)/N(HI)]=-7.62
(Frisch & York, 1991, in Extreme Ultraviolet Astronomy, 322)
j = N(HI) derived from N(MgII) assuming log[N(MgII)/N(HI)]=-5.1
(de Boer et al., 1986A&A...157..119D 1986A&A...157..119D)
Note (5): Quoted errors on N(HI) are
[-0.04, +0.09] for HD 141891
[-0.30, +0.50] for HD 87901
[-0.02, +0.07] for HD 34029
Note (6): Quoted errors on N(H2) are
∼50% for HD 65818
∼40% for HD 164284, HD 202904, and HD 214993
[-1.8, +2.9] for HD 158926
Note (7): *: N(H I) derived from more than one metal column density
See text for explanation about the different methods
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Ref Reference number
4- 22 A19 --- BibCode BibCode
24- 56 A33 --- Aut Author's name
58-150 A93 --- Com Comments
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History:
Prepared via OCR at CDS.
(End) James Marcout, Patricia Bauer [CDS] 09-Jan-2001