J/ApJ/728/70 The abundance of boron in diffuse clouds (Ritchey+, 2011)
The abundance of boron in diffuse interstellar clouds.
Ritchey A.M., Federman S.R., Sheffer Y., Lambert D.L.
<Astrophys. J., 728, 70 (2011)>
=2011ApJ...728...70R 2011ApJ...728...70R
ADC_Keywords: Spectra, ultraviolet ; Line Profiles ; Abundances ;
Interstellar medium ; Diffuse clouds ; Stars, early-type
Keywords: ISM: abundances - ISM: atoms -
nuclear reactions, nucleosynthesis, abundances - ultraviolet: ISM
Abstract:
We present a comprehensive survey of boron abundances in diffuse
interstellar clouds from observations made with the Space Telescope
Imaging Spectrograph (STIS) of the Hubble Space Telescope. Our sample
of 56 Galactic sight lines is the result of a complete search of
archival STIS data for the BIIλ1362 resonance line, with each
detection confirmed by the presence of absorption from OIλ1355,
CuIIλ1358, and GaIIλ1414 (when available) at the same
velocity. Five previous measurements of interstellar BII from Goddard
High Resolution Spectrograph (GHRS) observations are incorporated in
our analysis, yielding a combined sample that more than quadruples the
number of sight lines with significant boron detections. Our survey
also constitutes the first extensive analysis of interstellar gallium
from STIS spectra and expands on previously published results for
oxygen and copper. The observations probe both high- and low-density
diffuse environments, allowing the density-dependent effects of
interstellar depletion to be clearly identified in the gas-phase
abundance data for each element.
Description:
All STIS data sets for the final sample of interstellar sight lines
were obtained from the Multimission Archive at STScI (MAST) after the
close-out re-calibration of STIS archival data, completed in 2007.
Seventeen stars were also observed with the Harlan J. Smith 2.7m
telescope at McDonald Observatory using the high-resolution mode
(cs21) of the Tull (2dcoude) spectrograph during two observing runs in
2007 October and 2008 June, to obtain data on CaIIKλ3933 and
KIλ7698.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 88 61 Stellar data for the boron sample
table5.dat 60 224 Component structure for UV lines
table6.dat 42 180 Component structure for visible lines
table7.dat 179 61 Results of profile synthesis
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See also:
J/ApJS/199/8 : A compilation of interstellar column densities (Gudennavar+,
2012)
J/ApJ/702/1472 : Column densities for HI, AlIII, SiIV, CIV, OVI (Savage+, 2009)
J/ApJS/163/282 : Molecular hydrogen column densities (Wakker+, 2006)
J/ApJ/622/294 : STIS UV spectra of LMC planetary nebulae (Stanghellini+, 2005)
J/ApJS/151/313 : Optical spectra in star-forming regions (Pan+, 2004)
J/ApJS/93/211 : IUE survey of H I Lyα absorption. I. (Diplas+ 1994)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 --- Set [S/G] (S)TIS or (G)HRS sample
3- 13 A11 --- Name Star name
15- 25 A11 --- OName Other name
27- 34 A8 --- Assoc Association
36- 45 A10 --- SpT SIMBAD MK spectral type
47 A1 --- f_SpT [e] Composite spectrum (1)
49- 53 F5.2 mag Vmag SIMBAD V-band magnitude
55- 58 F4.2 mag E(B-V) ? Interstellar reddening (2)
59 A1 --- r_E(B-V) [bdgh] Note on E(B-V) (1)
61- 66 F6.2 deg GLON SIMBAD Galactic longitude
68- 73 F6.2 deg GLAT SIMBAD Galactic latitude
75- 79 I5 pc Dist Distance (2)
81- 83 I3 pc E_Dist ? Positive error on Dist
85- 87 I3 pc e_Dist ? Negative error on Dist
88 A1 --- r_Dist [bcfg] Origin of Dist (1)
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Note (1): Flag as follows:
b = From Cartledge et al. (2004ApJ...613.1037C 2004ApJ...613.1037C).
c = Derived by means of spectroscopic parallax using MV from Schmidt-Kaler
(1982lbg6.conf.....A).
d = Derived using intrinsic colors (B-V)0 from Schmidt-Kaler
(1982lbg6.conf.....A).
e = The star HD 203338 has a composite spectrum with a hot component
classified as a B spectral type (see Ginestet
et al. 1999A&AS..134..473G 1999A&AS..134..473G).
f = Corresponds to the distance adopted in Humphreys (1978ApJS...38..309H 1978ApJS...38..309H)
for Cep OB2.
g = From Pan et al. (2004, Cat. J/ApJS/151/313).
h = From Jenkins & Tripp (2001ApJS..137..297J 2001ApJS..137..297J).
Note (2): Values of E(B-V) and Dist are mainly from the references that
provided HI or H2 column densities (the majority of sight lines in
the boron sample have HI column densities provided by Diplas & Savage
(1994, Cat. J/ApJS/93/211); see Section 4.1 for more details).
Distances with error bars are from ≥3σ Hipparcos results. Other
exceptions are noted.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Star name
13- 17 F5.1 km/s V(OI) ? OI (1355) LSR velocity
19- 21 F3.1 km/s b(OI) ? OI (1355) Doppler parameter
23- 26 F4.2 --- N(OI) ? OI (1355) column density (1)
28- 32 F5.1 km/s V(CuII) ? CuII (1358) LSR velocity
34- 36 F3.1 km/s b(CuII) ? CuII (1358) Doppler parameter
38- 41 F4.2 --- N(CuII) ? CuII (1358) column density (1)
43- 47 F5.1 km/s V(GaII) ? GaII (1414) LSR velocity
49- 51 F3.1 km/s b(GaII) ? GaII (1414) Doppler parameter
53- 56 F4.2 --- N(GaII) ? GaII (1414) column density (1)
58- 60 A3 --- Notes Additional notes (2)
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Note (1): Relative to the total (line-of-sight) column density for this species.
Note (2): Note as follows:
1 = Derived from medium-resolution (E140M) data.
2 = Derived from high-resolution (E140H) data.
3 = No GaII data are available.
4 = GaII is not detected.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Star name
11- 15 F5.1 km/s V(CaII) ? CaII (3933) LSR velocity
17- 19 F3.1 km/s b(CaII) ? CaII (3933) Doppler parameter
21 A1 --- l_N(CaII) Limit flag on CaIIN
22- 25 F4.2 --- N(CaII) ? CaII (3933) column density (1)
27- 31 F5.1 km/s V(KI) ? KI (7698) LSR velocity
33- 35 F3.1 km/s b(KI) ? KI (7698) Doppler parameter
37- 40 F4.2 --- N(KI) ? KI (7698) column density (1)
42 A1 --- Notes Additional notes (2)
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Note (1): Relative to the total (line-of-sight) column density for this
species. For simplicity, values for components that make up less
than 1 percent of the total column density are given as <0.01.
Note (2): Note as follows:
1 = KI component at -10.2km/s is affected by telluric absorption.
2 = No high-resolution data on CaII are available.
3 = High-resolution data on KI are available from Welty & Hobbs
2001ApJS..133..345W 2001ApJS..133..345W.
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Name Star name
12 A1 --- f_Name [cd] Note on B lines (1)
14- 19 F6.3 [cm-2] logNOId Direct logN(OI) (2)
21- 25 F5.3 [cm-2] E_logNOId Positive error on logNOId
27- 31 F5.3 [cm-2] e_logNOId Negative error on logNOId
33- 38 F6.3 [cm-2] logNOIt ? Template logN(OI) (2)
40- 44 F5.3 [cm-2] E_logNOIt ? Positive error on logNOIt
46- 50 F5.3 [cm-2] e_logNOIt ? Negative error on logNOIt
52- 56 F5.2 [cm-2] logNCud ? Direct logN(CuII) (2)
58- 61 F4.2 [cm-2] E_logNCud ? Positive error on logNCud
63- 66 F4.2 [cm-2] e_logNCud ? Negative error on logNCud
68- 72 F5.2 [cm-2] logNCut ? Template logN(CuII) (2)
74- 77 F4.2 [cm-2] E_logNCut ? Positive error on logNCut
79- 82 F4.2 [cm-2] e_logNCut ? Negative error on logNCut
84 A1 --- l_logNGad Limit flag on logNGad
85- 89 F5.2 [cm-2] logNGad ? Direct logN(GaII) (2)
91- 94 F4.2 [cm-2] E_logNGad ? Positive error on logNGad
96- 99 F4.2 [cm-2] e_logNGad ? Negative error on logNGad
101-105 F5.2 [cm-2] logNGat ? Template logN(GaII) (2)
107-110 F4.2 [cm-2] E_logNGat ? Positive error on logNGat
112-115 F4.2 [cm-2] e_logNGat ? Negative error on logNGat
117-121 F5.2 [cm-2] logNB2O ? BII column density (logN(BII)) from OI (3)
123-126 F4.2 [cm-2] E_logNB2O ? Positive error on logNB2O
128-131 F4.2 [cm-2] e_logNB2O ? Negative error on logNB2O
133-137 F5.2 [cm-2] logNB2Cu ? logN(BII) from CuII (3)
139-142 F4.2 [cm-2] E_logNB2Cu ? Positive error on logNB2Cu
144-147 F4.2 [cm-2] e_logNB2Cu ? Negative error on logNB2Cu
149-153 F5.2 [cm-2] logNB2Ga ? logN(BII) from GaII (3)
155-158 F4.2 [cm-2] E_logNB2Ga ? Positive error on logNB2Ga
160-163 F4.2 [cm-2] e_logNB2Ga ? Negative error on logNB2Ga
165-169 F5.2 [cm-2] logNB2vis ? logN(BII) from visible data (3)
171-174 F4.2 [cm-2] E_logNB2vis ? Positive error on logNB2vis
176-179 F4.2 [cm-2] e_logNB2vis ? Negative error on logNB2vis
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Note (1): Flag as follows:
c = Second line lists results from high-resolution (E140H) data.
d = Fits to the BII profiles toward HD 13268 and HD 13745 exclude components
at large negative velocities (see the text).
Note (2): Column density in cm-2 obtained either by direct profile
synthesis or by applying a fixed velocity template based on visible data.
Note (3): BII column density obtained by fitting the observed spectrum with
a fixed profile template derived from either the OI, CuII, or GaII
line, or from visible data.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 06-Sep-2012