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J/ApJ/702/1472   Column densities for HI, AlIII, SiIV, CIV, OVI  (Savage+, 2009)

The extension of the transition temperature plasma into the lower Galactic halo. Savage B.D., Wakker B.P. <Astrophys. J., 702, 1472-1489 (2009)> =2009ApJ...702.1472S
ADC_Keywords: Abundances ; Ultraviolet ; Interstellar medium ; Milky Way Keywords: Galaxy: halo - ISM: clouds - ISM: structure - ultraviolet: ISM Abstract: Column densities for HI, AlIII, SiIV, CIV, and OVI toward 109 stars and 30 extragalactic objects have been assembled to study the extensions of these species away from the Galactic plane into the Galactic halo. HI and AlIII mostly trace the warm neutral and warm ionized medium, respectively, while SiIV, CIV, and OVI trace a combination of warm photoionized and collisionally ionized plasmas. The much larger object sample compared to previous studies allows us to consider and correct for the effects of the sample bias that has affected earlier but smaller surveys of the gas distributions. The observations are compared to the predictions of the various models for the production of the transition temperature gas in the halo. Description: We have supplemented the IUE (FUSE surveys of OVI with the International Ultraviolet Explorer satellite at a resolution of 25km/s, Savage et al. (2001, Cat. J/ApJS/136/631)) and FUSE (OVI toward many of those stars with FUSE at a resolution of 20km/s by Bowen et al. (2008, Cat. J/ApJS/176/59)) disk/halo star effort with new measurements of SiIV and CIV absorption from the Space Telescope Imaging Spectrograph (STIS) archive of 25 extragalactic objects for which good quality OVI data exist from FUSE. These new observations are from B. P. Wakker et al. (2010, in preparation). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 129 140 Column densities
See also: J/ApJS/176/59 : FUSE survey of OVI in the disk of the Milky Way (Bowen+, 2008) J/ApJ/647/312 : FUSE survey of OVI in the Milky Way (Otte+, 2006) J/AJ/125/2502 : Spectral indices of Galactic halo (Morrison+, 2003) J/ApJS/146/1 : O VI absorption in FUSE survey (Wakker+, 2003) J/ApJS/136/631 : IUE absorption toward 164 early-type stars (Savage+, 2001) J/ApJS/93/211 : IUE survey of H I Lyα absorption. I. (Diplas+ 1994) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 16 A16 --- Name Star HD number or alternate name 18- 28 A11 --- Class Object type for AGN or MK spectral type (1) 30- 35 F6.2 deg GLON Galactic longitude 37- 42 F6.2 deg GLAT Galactic latitude 44- 47 F4.1 kpc Dist ? Stellar distance, d (1) 49- 52 F4.2 --- Sig ? The estimated logarithmic error (dex) in the distance (1) 54- 57 A4 --- HII Prominent HII regions associated with the star as identified via the footnotes 58 A1 --- f_HII [a-g] Note related with line of sight (2) 60 I1 --- [R] [0,3]? The 0.25-1.0keV brightness of the X-ray sky in the direction of each object (3) 62- 66 F5.2 [cm-2] lgN(H1) ? Logarithmic HI column density (4) 68- 71 F4.2 [cm-2] e_lgN(H1) ? lgN(H1) uncertainty 73 A1 --- l_lgN(Al3) Limit flag on lgN(Al3) 74- 78 F5.2 [cm-2] lgN(Al3) ? Logarithmic AlIII column density 79 A1 --- u_lgN(Al3) [:] Uncertainty flag on lgN(Al3) 81- 84 F4.2 [cm-2] e_lgN(Al3) ? lgN(Al3) uncertainty 86 A1 --- l_lgN(Si4) Limit flag on lgN(Si4) 87- 91 F5.2 [cm-2] lgN(Si4) ? Logarithmic SiIV column density 93- 96 F4.2 [cm-2] e_lgN(Si4) ? lgN(Si4) uncertainty 98 A1 --- l_lgN(C4) Limit flag on lgN(C4) 99-103 F5.2 [cm-2] lgN(C4) ? Logarithmic CIV column density 104 A1 --- u_lgN(C4) [:] Uncertainty flag on lgN(C4) 106-109 F4.2 [cm-2] e_lgN(C4) ? lgN(C4) uncertainty 111 A1 --- l_lgN(O6) Limit flag on lgN(O6) 112-116 F5.2 [cm-2] lgN(O6) ? Logarithmic OVI column density 118-121 F4.2 [cm-2] e_lgN(O6) ? lgN(O6) uncertainty 123-129 A7 --- Ref AlIII, SiIV & CIV and OVI sources (5)
Note (1): From Bowen et al. (2008, Cat. J/ApJS/176/59) and references therein. Note (2): Flag as follows: a = Line of sight samples gas in the Scutum Supershell (see Savage et al. 2001ApJ...547..907S). b = Line of sight samples gas in the Gum nebula. c = Line of sight samples gas in the Vela SNR. d = Line of sight samples gas in the Carina HII region. e = Line of sight samples gas in Gum 42 which is also R62. f = Line of sight samples gas in Gum 56 which is within R113. g = Line of sight samples gas in Gum 57a which is within S2. Note (3): [R], a measure of the 0.25-1.0keV brightness of the X-ray sky in the direction of each object from Bowen et al. with R=0, 1, 2, and 3 implying an increasing brightness of the X-ray sky in the immediate vicinity of the star or AGN. Note (4): The HI column densities for the stars are from the Lyα observations of Diplas & Savage (1994ApJ...427..274D). For the AGNs, the HI column densities are from the 21cm results compiled by Wakker et al. (2003, Cat. J/ApJS/146/1). Note (5): Up to 3 references are given, the last number referencing the source of OVI column density, and PF=Profile Fit method. The sources are as follows: 1 = Bowen et al. 2008, Cat. J/ApJS/176/59; 2 = Savage et al. 2001, Cat. J/ApJS/136/631; 3 = Zsargo et al. 2003ApJ...586.1019Z; 4 = Savage & Sembach 1994ApJ...434..145S; 5 = Fox et al. 2003ApJ...582..793F; 6 = Savage et al. 2001ApJ...547..907S; 7 = Jenkins 1978ApJ...219..845J; 8 = Edgar & Savage 1992ApJ...396..124E; 9 = Brandt et al. 1999AJ....117..400B; 10 = Fitzpatrick & Spitzer 1997ApJ...475..623F; 11 = Huang et al. 1995ApJ...450..163H; 12 = Howk & Savage 1999ApJ...517..746H; 13 = AGN results from B. P. Wakker et al. (2010, in preparation); 14 = LMC results from Lehner & Howk, 2007MNRAS.377..687L; 15 = Sembach & Savage, 1992ApJS...83..147S; 16 = Hoopes et al. 2002ApJ...569..233H.
History: From electronic version of the journal
(End) Emmanuelle Perret [CDS] 07-Oct-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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