J/A+A/510/A54 NaI and CaII interstellar absorption (Welsh+, 2010)
New 3-D density maps of NaI and CaII interstellar absorption within 300pc.
Welsh B.Y., Lallement R., Vergely J.-L., Raimond S.
<Astron. Astrophys. 510, A54 (2010)>
=2010A&A...510A..54W 2010A&A...510A..54W
ADC_Keywords: Stars, nearby ; Abundances ; Interstellar medium
Keywords: solar neighborhood - ISM: atoms - ISM: clouds
Abstract:
We present new high resolution (R>50000) absorption measurements of
the NaI doublet (5889-5895Å) along 482 nearby sight-lines, in
addition to 807 new measurements of the CaII K (3933Å) absorption
line. We have combined these new data with previously reported
measurements to produce a catalog of absorptions towards a total of
1857 early-type stars located within 800pc of the Sun. Using these
data we have determined the approximate 3-dimensional spatial
distribution of neutral and partly ionized interstellar gas density
within a distance-cube of 300pc from the Sun.
Description:
All newly recorded spectra were analyzed by means of a multi-component
line profile-fitting program, in most cases using simultaneous fits to
the line doublets. Normalized absorption profiles were fitted by
varying the velocity, doppler width and column density for all
intervening interstellar clouds. The resulting total column densities
were then used in conjunction with the Hipparcos distances of the
target stars to construct inversion maps of the 3D spatial density
distribution of the NaI and CaII bearing gas.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 96 1851 NaI and CaII absorption measurements
refs.dat 150 104 References
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See also:
J/ApJS/147/61 : Interstellar Ca I absorption (Welty+, 2003)
J/A+A/441/181 : Interstellar 12C/13C ratios (Casassus+, 2005)
J/ApJ/652/1230 : H2CO absorption toward Galactic anticenter (Rodriguez+ 2006)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name HD or HIP number of the observed star
12- 16 F5.1 deg GLON Galactic longitude of star
18- 22 F5.1 deg GLAT Galactic latitude of star
24 A1 --- l_Dist Limit glag on Dist
25- 27 I3 pc Dist ? Distance to star
29 A1 --- l_EWD1 Limit flag on EWD1
30- 35 F6.2 0.1pm EWD1 ? Equivalent width of the NaI D1 line
37 A1 --- l_EWD2 Limit flag on EWD2
38- 43 F6.2 0.1pm EWD2 ? Equivalent width of the NaI D2 line
45 A1 --- l_N(NaI) Limit flag on log[N(NaI)]
46- 50 F5.2 [cm-2] N(NaI) ? Log of total NaI column density
52- 61 A10 --- n_N(NaI) Observatory (with date) where new data was taken
63- 65 I3 --- r_N(NaI) ? Published reference for NaI data
67 A1 --- l_EWCaII Limit flag on EWCaII
68- 73 F6.2 0.1pm EWCaII ? Equivalent width of the CaII K-line
75 A1 --- l_N(CaII) Limit flag on log[N(CaII)]
76- 80 F5.2 [cm-2] N(CaII) ? Log of total CaII column density
82- 93 A12 --- n_N(CaII) Observatory (with date) where new data was taken
94- 96 I3 --- r_N(CaII) ? Published reference for CaII data
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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- 3 I3 --- Ref Reference code
5- 23 A19 --- BibCode BibCode
25- 43 A19 --- Aut Author's name
44-150 A107 --- Com Comments
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Acknowledgements:
Barry Welsh, bwelsh(at)ssl.berkeley.edu
History:
* 11-Feb-2010: on-line version
* 23-Jun-2015: units corrected into 0.1pm (instead of 0.1nm)
(End) Patricia Vannier [CDS] 15-Dec-2009