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J/MNRAS/367/1478    Interstellar NaI, TiII & CaIIK obs.        (Hunter+, 2006)

Early-type stars observed in the ESO UVES Paranal Observatory Project - I. Interstellar NaI UV, TiII and CaII K observations. Hunter I., Smoker J.V., Keenan F.P., Ledoux C., Jehin E., Cabanac R., Melo C., Bagnulo S. <Mon. Not. R. Astron. Soc., 367, 1478-1514 (2006)> =2006MNRAS.367.1478H
ADC_Keywords: Interstellar medium ; Ultraviolet ; Spectroscopy ; Stars, early-type Keywords: stars: early-type - ISM: abundances - ISM: clouds - ISM: general - ISM: structure Abstract: We present an analysis of interstellar NaI (λair=3302.37 and 3302.98Å), TiII (λair=3383.76Å) and CaIIK (λair=3933.66Å) absorption features for 74 sightlines towards O- and B-type stars in the Galactic disc. The data were obtained from the Ultraviolet and Visual Echelle Spectrograph Paranal Observatory Project (UVES POP), at a spectral resolution of 3.75km/s and with mean signal-to-noise ratios per pixel of 260, 300 and 430 for the NaI, TiII and CaII observations, respectively. Interstellar features were detected in all but one of the TiII sightlines and all of the CaII sightlines. The dependence of the column density of these three species with distance, height relative to the Galactic plane, HI column density, reddening and depletion relative to the solar abundance has been investigated. We also examine the accuracy of using the NaI column density as an indicator of that for HI. In general, we find similar strong correlations for both Ti and Ca, and weaker correlations for Na. Our results confirm the general belief that Ti and Ca occur in the same regions of the interstellar medium (ISM) and also that the TiII/CaII ratio is constant over all parameters. We hence conclude that the absorption properties of Ti and Ca are essentially constant under the general ISM conditions of the Galactic disc. Description: We have extracted spectra for three interstellar species, namely the NaI UV doublet, TiII and CaII K along the sightlines to 74 O- and B-type field stars from An Atlas of High-Resolution Spectra of Stars across the Hertzsprung-Russell Diagram, available from the Ultraviolet and Visual Echelle Spectrograph Paranal Observatory Project. The spectra presented in this paper are the merged versions of the POP survey available online at http://www.eso.org/uvespop . File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 70 74 The stellar sample and basic parameters table3.dat 201 528 Component table table4.dat 130 74 *Total column density
Note on table4.dat: Total column density derived by the summation of the individual interstellar components listed in Table 3. We also present the total derived by the apparent optical depth (AOD) method, discussed in Section 3.4.
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 2 A2 --- --- [HD] 4- 9 I6 --- HD HD number 12- 17 F6.2 deg GLON Galactic longitude 19- 24 F6.2 deg GLAT Galactic latitude 27- 41 A15 --- SpType MK spectral type 43- 46 F4.2 mag VMAG Absolute V magnitude 48- 52 F5.2 mag B-V B-V colour index 54- 58 F5.2 mag E(B-V) Reddening 60- 63 I4 pc Dist Distance (1) 64 A1 --- r_Dist [a-f] Distance reference (2) 66- 70 I5 pc z Distance above the plane
Note (1): Distances for the majority of the stars were calculated spectroscopically and errors are of the order of 25 per cent, excluding systematic errors. For some objects the distance was taken from the literature, references to which are given in r_Dist. Note (2): References as follows: a = Diplas & Savage (1994, Cat. J/ApJS/93/211) b = Fruscione et al. (1994, Cat. J/ApJS/94/127) c = Hoekzema et al. (1993, Cat. J/A+AS/98/505) d = Winkler (1997MNRAS.287..481W) e = Conti & Vacca (1990AJ....100..431C) f = Conti et al. (1983ApJ...274..302C)
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 2 A2 --- --- [HD] 4- 9 I6 --- HD HD number 10- 11 A2 --- n_HD Note on Name (1) 12- 13 I2 --- m_HD Component number 15- 20 F6.1 km/s vNaI1 ?=- NaI (3302.37) LSR velocity 22- 24 F3.1 km/s e_vNaI1 ?=- rms uncertainty on vNaI1 26- 29 F4.1 --- bNaI1 ?=- NaI (3302.37) Gaussian velocity dispersion parameter 31- 34 F4.1 --- e_bNaI1 ?=- rms uncertainty on bNaI1 37 A1 --- l_EWNaI1 Limit flag on EWNaI1 38- 41 F4.1 0.1nm EWNaI1 ?=- NaI (3302.37) equivalent width 43- 45 F3.1 0.1nm e_EWNaI1 ?=- rms uncertainty on EWNaI1 47 A1 --- l_logNNaI1 Limit flag on logNNaI1 48- 52 F5.2 [cm-2] logNNaI1 ?=- NaI (3302.37) column density 54- 57 F4.2 [cm-2] e_logNNaI1 ? rms uncertainty on logNNaI1 59- 63 F5.1 km/s vNaI2 ?=- NaI (3302.98) LSR velocity 65- 67 F3.1 km/s e_vNaI2 ?=- rms uncertainty on vNaI2 69- 72 F4.1 --- bNaI2 ?=- NaI (3302.98) Gaussian velocity dispersion parameter 74- 77 F4.1 --- e_bNaI2 ?=- rms uncertainty on bNaI2 79 A1 --- l_EWNaI2 Limit flag on EWNaI2 80- 83 F4.1 0.1nm EWNaI2 ?=- NaI (3302.98) equivalent width 85- 87 F3.1 0.1nm e_EWNaI2 ? rms uncertainty on EWNaI2 89 A1 --- l_logNNaI2 Limit flag on logNNaI2 90- 94 F5.2 [cm-2] logNNaI2 ?=- NaI (3302.98) column density 96- 99 F4.2 [cm-2] e_logNNaI2 ? rms uncertainty on logNNaI2 101-106 F6.1 km/s vTiII ?=- TiII (3383.76) LSR velocity 108-111 F4.1 km/s e_vTiII ?=- rms uncertainty on vTiII 113-116 F4.1 --- bTiII ?=- TiII (3383.76) Gaussian velocity dispersion parameter 118-121 F4.1 --- e_bTiII ?=- rms uncertainty on bTiII 123 A1 --- l_EWTiII Limit flag on EWTiII 124-127 F4.1 0.1nm EWTiII ?=- TiII (3383.76) equivalent width 129-131 F3.1 0.1nm e_EWTiII ? rms uncertainty on EWTiII 133 A1 --- l_logNTiII Limit flag on logNTiII 134-138 F5.2 [cm-2] logNTiII ?=- TiII (3383.76) column density 140-143 F4.2 [cm-2] e_logNTiII ? rms uncertainty on logNTiII 145-150 F6.1 km/s vCaII ?=- CaII (3393.66) LSR velocity 152-154 F3.1 km/s e_vCaII ? rms uncertainty on vCaII 156-159 F4.1 --- bCaII ?=- CaII (3393.66) Gaussian velocity dispersion parameter 161-164 F4.1 --- e_bCaII ?=- rms uncertainty on bCaII 166 A1 --- l_EWCaII Limit flag on EWCaII 167-171 F5.1 0.1nm EWCaII ?=- CaII (3393.66) equivalent width 173-176 F4.1 0.1nm e_EWCaII ? rms uncertainty on EWCaII 178 A1 --- l_logNCaII Limit flag on logNCaII 179-183 F5.2 [cm-2] logNCaII ?=- CaII (3393.66) column density 185-188 F4.2 [cm-2] e_logNCaII ? rms uncertainty on logNCaII 190-195 F6.1 km/s Vell Lower value of velocity range over which upper limits were estimated 197-201 F5.1 km/s Velu Upper value of velocity range over which upper limits were estimated
Note (1): Notes as follows: a = Poor baseline fitting at 3302Å. No sodium components fitted. b = Stellar contamination removed in Ti and Ca. c = Stellar Ca line has been fitted and removed. d = Ca heavily contaminated by stellar profile, only component velocities given. e = Components 3-5 and 10 may be stellar. f = Ti heavily contaminated by stellar profile, not fitted. g = Stellar lines of unknown width. h = Sodium lines are in poor agreement. i = LSR velocity of star unknown.
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 2 A2 --- --- [HD] 4- 9 I6 --- HD HD number 11- 13 I3 --- S/NNaI1 NaI (3302.37) S/N 15 A1 --- l_logNNaI1p Limit flag on logNNaI1p 16- 20 F5.2 [cm-2] logNNaI1p NaI (3302.37) total column density from table 3 22- 25 F4.2 [cm-2] e_logNNaI1p ? rms uncertainty on logNNaI1p 27 A1 --- l_logNNaI1A Limit flag on logNNaI1A 28- 32 F5.2 [cm-2] logNNaI1A NaI (3302.37) total column density derived by AOD method 34- 37 F4.2 [cm-2] e_logNNaI1A ? rms uncertainty on logNNaI1A 39- 41 I3 --- S/NNaI2 NaI (3302.98) S/N 43 A1 --- l_logNNaI2p Limit flag on logNNaI2p 44- 48 F5.2 [cm-2] logNNaI2p NaI (3302.98) total column density from table 3 50- 53 F4.2 [cm-2] e_logNNaI2p ? rms uncertainty on logNNaI2p 55 A1 --- l_logNNaI2A Limit flag on logNNaI2A 56- 60 F5.2 [cm-2] logNNaI2A NaI (3302.98) total column density derived by AOD method 62- 65 F4.2 [cm-2] e_logNNaI2A ? rms uncertainty on logNNaI2A 67- 69 I3 --- S/NTiII ?=- TiII (3383.76) S/N 71 A1 --- l_logNTiIIp Limit flag on logNTiIIp 72- 76 F5.2 [cm-2] logNTiIIp ?=- TiII (3383.76) total column density from table 3 78- 81 F4.2 [cm-2] e_logNTiIIp ? rms uncertainty on logNTiIIp 83 A1 --- l_logNTiIIA Limit flag on logNTiIIA 84- 88 F5.2 [cm-2] logNTiIIA ?=- TiII (3383.76) total column density derived by AOD method 90- 93 F4.2 [cm-2] e_logNTiIIA ? rms uncertainty on logNTiIIA 95- 97 I3 --- S/NCaII ?=- CaII (3393.66) S/N 99-103 F5.2 [cm-2] logNCaIIp ?=- CaII (3393.66) total column density from table 3 105-108 F4.2 [cm-2] e_logNCaIIp ? rms uncertainty on logNCaIIp 110-114 F5.2 [cm-2] logNCaIIA ?=- CaII (3393.66) total column density derived by AOD method 116-119 F4.2 [cm-2] e_logNCaIIA ? rms uncertainty on logNCaIIA 121-125 F5.2 [cm-2] logNHI ?=- HI total column density 127-130 F4.2 [cm-2] e_logNHI ? rms uncertainty on logNHI
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 06-Oct-2006
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