2015MNRAS.451.1396M


C.D.S. - SIMBAD4 rel 1.7 - 2020.05.25CEST01:02:05

2015MNRAS.451.1396M - Mon. Not. R. Astron. Soc., 451, 1396-1412 (2015/August-1)

Early-type stars observed in the ESO UVES Paranal Observatory Project - V. Time-variable interstellar absorption.

McEVOY C.M., SMOKER J.V., DUFTON P.L., SMITH K.T., KENNEDY M.B., KEENAN F.P., LAMBERT D.L., WELTY D.E. and LAUROESCH J.T.

Abstract (from CDS):

The structure and properties of the diffuse interstellar medium (ISM) on small scales, sub-au to 1 pc, are poorly understood. We compare interstellar absorption lines, observed towards a selection of O- and B-type stars at two or more epochs, to search for variations over time caused by the transverse motion of each star combined with changes in the structure in the foreground ISM. Two sets of data were used: 83 VLT/UVES spectra with approximately 6 yr between epochs and 21 McDonald observatory 2.7-m telescope echelle spectra with 6-20 yr between epochs, over a range of scales from ∼ 0-360 au. The interstellar absorption lines observed at the two epochs were subtracted and searched for any residuals due to changes in the foreground ISM. Of the 104 sightlines investigated with typically five or more components in Nai D, possible temporal variation was identified in five UVES spectra (six components), in CaII, Ca i and/or Nai absorption lines. The variations detected range from 7 percent to a factor of 3.6 in column density. No variation was found in any other interstellar species. Most sightlines show no variation, with 3σ upper limits to changes of the order 0.1-0.3 dex in CaII and Nai. These variations observed imply that fine-scale structure is present in the ISM, but at the resolution available in this study, is not very common at visible wavelengths. A determination of the electron densities and lower limits to the total number density of a sample of the sightlines implies that there is no striking difference between these parameters in sightlines with, and sightlines without, varying components.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): stars: early-type - ISM: abundances - ISM: clouds - ISM: general - ISM: structure

Status at CDS:  

Simbad objects: 113

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Number of rows : 113

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 V* BM Hyi a2* 01 44 32.9710852435 -61 01 07.340453580   6.71 6.79     ApSi 32 0
2 V* BT Eri Al* 03 34 31.0660575731 -39 24 43.394804720   9.63 9.59     A0/1IV 10 0
3 * zet Per V* 03 54 07.9224751 +31 53 01.081262 2.19 2.97 2.85 2.71 2.62 B1Ib 812 0
4 HD 29138 * 04 13 46.7266866592 -84 29 08.852791567 6.26 7.093 7.199     B1.5III 37 0
5 HD 30677 * 04 50 03.6140690917 +08 24 28.243932216 5.94 6.82 6.84     B1II-III((n)) 59 0
6 * lam Eri Be* 05 09 08.7831482 -08 45 14.690823 3.17 4.07 4.27 4.35 4.55 B2III(e)p 283 1
7 HD 43285 Be* 06 15 40.1770250717 +06 03 58.206069132 5.42 5.94 6.07     B6Ve 95 0
8 * bet01 Mon Be* 06 28 49.06971 -07 01 59.0101 3.87 4.50 4.60     B4Veshell 240 0
9 HD 46185 * 06 31 24.2367383002 -12 33 34.890128156   6.63 6.79     B2/3(II) 27 0
10 V* AL Col a2* 06 31 45.1943660 -37 10 23.222270   7.46 7.56     ApSi 25 0
11 HD 47116 * 06 36 05.0599673467 -24 07 07.560687323   7.71 7.70     ApSi 27 0
12 HD 48099 Be* 06 41 59.2307767004 +06 20 43.538696992 5.38 6.32 6.37 6.30 6.35 O5V((f))z+O9:V 277 0
13 HD 49131 Be* 06 45 31.1886574836 -30 56 56.326766828 4.48 5.55 5.68 7.15   B1.5Vne 68 0
14 * 12 CMa a2* 06 47 01.4837300198 -21 00 55.449397291 5.27 5.89 6.08     B7II/III 132 0
15 HD 50896 WR* 06 54 13.0440847499 -23 55 42.020318514 5.74 6.63 6.91 7.74   WN4b 734 0
16 HD 51876 * 06 58 24.2461720212 -16 03 16.565092331   7.042 7.131     B9IIw 15 0
17 * 19 Mon bC* 07 02 54.7766724 -04 14 21.237679 3.87 4.80 5.00 5.06 5.25 B2Vn(e) 181 0
18 HD 58377 * 07 24 07.9946289454 -28 49 40.370560624 5.98 6.64 6.81     B3III 30 0
19 HD 58343 Be* 07 24 40.1874154193 -16 12 05.299273325 4.52 5.15 5.19 5.05 5.06 B2Vne 201 0
20 HD 58978 Be* 07 26 59.4826767357 -23 05 09.683936209 4.51 5.45 5.56 7.05   B0.5IVe 210 0
21 HD 60498 * 07 33 25.1898904335 -33 23 59.636823861   7.23 7.35     B4IV 33 0
22 * m Pup bL* 07 38 18.0454096 -25 21 53.301669   4.59 4.70     B8III 58 1
23 V* V456 Car Ro* 07 42 23.7789286664 -56 08 45.658961827   7.17 7.25     B7V(p) 21 0
24 V* V341 Pup a2* 07 55 21.7597641609 -28 17 02.275797584 6.54 7.064 7.180     B8/9II 30 0
25 HD 67536 Pu* 08 04 42.9316419264 -62 50 10.842413272   6.136 6.241     B2Vn 53 1
26 HD 68761 * 08 12 27.3689212818 -36 59 21.231615830 5.53 6.430 6.532 7.43   B1/2III 53 0
27 HD 72067 Be* 08 29 07.56710 -44 09 37.4914 4.99 5.65 5.81     B2/3V 95 1
28 NAME Vela XYZ Rad 08 34.0 -45 50           ~ 1106 2
29 NGC 2632 OpC 08 40 24 +19 40.0           ~ 1218 0
30 IC 2391 OpC 08 40 32 -53 02.0           ~ 713 0
31 HD 74966 * 08 45 48.3510147427 -36 44 34.759468455   7.286 7.435     B4IV 16 0
32 HD 76131 * 08 51 45.5508853812 -55 48 31.873468577   6.634 6.684     B6III 17 0
33 HD 76341 Em* 08 54 00.6139143219 -42 29 08.767038173 6.88 7.392 7.163 8.08   O9.2IV 90 1
34 HD 83312 Be* 09 34 29.7946044415 -66 07 20.042116431   7.46 7.47     B3/5p_sh 13 0
35 HD 88661 Be* 10 11 46.4588844420 -58 03 37.956100045 4.77 5.66 5.75 5.66 5.70 B5Vne 137 0
36 HD 89587 * 10 19 02.5653750274 -50 42 57.952659435 6.13 6.738 6.875     B3III 21 0
37 HD 90177 s*b 10 22 53.8426931454 -59 37 28.361118869 9.16 9.66 8 8.15   LBV 301 0
38 * L Car * 10 22 58.1460612 -66 54 05.390302 4.35 4.86 4.99     B8V 99 0
39 * del Sex PM* 10 29 28.7022163 -02 44 20.686255   5.130 5.180     B9V 74 0
40 * rho Leo s*b 10 32 48.6716770 +09 18 23.709445 2.780 3.720 3.870 3.90 4.06 B1Iab 511 0
41 HD 92740 WR* 10 41 17.5154230335 -59 40 36.897706569 5.68 6.50 6.42 7.38   WN7h+O9III-V 379 0
42 V* AG Car WR* 10 56 11.5779283438 -60 27 12.809532379 7.00 7.57 6.96 7.73   WN11h 585 0
43 HD 94963 Em* 10 56 35.7863597984 -61 42 32.283278825 6.35 7.17 7.26 8.10   O7II(f) 73 0
44 * lam Cen * 11 35 46.8790838328 -63 01 11.396483522 2.96 3.10 3.14 3.10 3.11 B9III 121 0
45 HD 105056 s*b 12 05 49.8805966991 -69 34 22.993604342 6.57 9.07 8.74 8.45   ON9.7Iae 119 1
46 HD 105071 * 12 05 53.6200142443 -65 32 48.754487986 6.05 6.436 6.303     B8Ia 41 0
47 HD 106068 * 12 12 21.9798375290 -62 57 02.787321889 5.90 6.28 5.98 5.64 5.39 B8Ia/ab 71 0
48 HD 109867 s*b 12 38 52.3586203902 -67 11 34.977744461 5.5 6.263 6.265 7.45   B0.5/1Iab 92 0
49 HD 112272 s*b 12 56 33.7344239348 -64 21 39.190750395 7.87 8.057 7.379 7.95   B0.5Ia 73 0
50 HD 112842 * 13 00 31.5269107590 -60 22 31.319694221 6.83 7.234 7.072     B4II 41 0
51 Ass Cen OB 1 As* 13 02 -61.4           ~ 102 0
52 GSH 305+04-26 sh 13 07 -59.           ~ 4 0
53 * tet Mus WR* 13 08 07.1527888825 -65 18 21.679641155 4.71 5.50 5.53 5.44 5.40 WC5+B0III 295 0
54 * tet Vir ** 13 09 56.9843568248 -05 32 20.465727623   4.385 4.397     A1IVs 242 0
55 HD 115363 s*b 13 18 06.8645878178 -63 41 13.634362256 7.95 8.46 7.87 8.72   B1Ia+ 72 0
56 HD 115842 Em* 13 20 48.3389216362 -55 48 02.482627552 5.70 6.39 6.09 5.77 5.52 B0.5Ia/ab 141 0
57 * 3 Cen ** 13 51 49.60136 -32 59 38.7067           B5III+B9IV 239 0
58 V* V869 Cen SB* 14 09 35.0321792855 -51 30 16.830351860   5.913 5.961     B8V 84 0
59 * a Cen Ro* 14 23 02.2390294 -39 30 42.549250 3.50 4.24 4.42 4.53 4.70 B2V 253 0
60 HD 133518 * 15 06 55.9722559425 -52 01 47.238970853 5.57 6.29 6.39     B2IVpHe 86 0
61 HD 136239 s*b 15 22 20.0793591624 -59 08 49.939030931 8.57 8.86 7.95 8.42   B2Iae 57 0
62 HD 137753 * 15 29 58.3732505269 -52 18 10.185679480   6.66 6.69     B7IV 11 0
63 V* NN Aps a2* 15 31 27.1149385254 -71 03 43.664320879   6.76 6.87     Ap(SiCrFe) 83 0
64 * b Sco * 15 50 58.7451174285 -25 45 04.662754169 3.84 4.552 4.635     B1.5Vn 269 0
65 * 3 Sco Ro* 15 54 39.5292926476 -25 14 37.459112692 5.23 5.81 5.87     B8III/IV 191 0
66 * 48 Lib Be* 15 58 11.3686950 -14 16 45.689426 4.61 4.77 4.87 4.91 4.96 B5IIIp_sh 425 0
67 * pi. Sco bL* 15 58 51.1132378 -26 06 50.788602 1.82 2.71 2.91 3.00 3.20 B1V+B2:V: 373 0
68 HD 142758 s*b 15 59 23.7395955677 -58 43 34.397472915 6.62 7.236 7.072 7.96   B1Ia 55 0
69 * del Sco SB* 16 00 20.00528 -22 37 18.1431 1.30 2.20 2.32 2.36 2.49 B0.3IV 690 0
70 HD 143448 Be* 16 03 44.4672503658 -60 29 54.473084256 6.49 7.25 7.30 8.29   B1Ve 69 0
71 * bet01 Sco SB* 16 05 26.2319826 -19 48 19.630018 1.68 2.55 2.62 2.60 2.69 B1V 532 0
72 * ome Sco bC* 16 06 48.4269211 -20 40 09.090235 3.10 3.92 3.97 3.91 3.99 B1V 436 0
73 * c02 Sco SB* 16 12 18.2048972 -27 55 34.945744 3.66 4.413 4.568     B2V 164 0
74 HD 145792 a2* 16 13 45.49839 -24 25 19.5421         6.14 B6IV 113 0
75 * tet Nor PM* 16 15 15.3179416149 -47 22 19.271046026   5.007 5.124     B8V 37 0
76 * omi Sco V* 16 20 38.1806792 -24 10 09.549111 5.99 5.40 4.57 3.69 2.93 A4II/III 239 0
77 * sig Sco bC* 16 21 11.3157134 -25 35 34.051476 2.32 3.02 2.89 1.69 1.58 O9.5(V)+B7(V) 823 0
78 * chi Oph Be* 16 27 01.4349892 -18 27 22.493784 3.95 4.71 4.43 3.97 3.73 B2Vne 564 0
79 HD 148379 Be* 16 29 42.3271423063 -46 14 35.632001296 5.51 5.95 5.37 4.85 4.39 B2Iab 165 0
80 HD 148688 s*b 16 31 41.7695375461 -41 49 01.729591907 5.16 5.78 5.39 5.05 4.70 B1Iaeqp 152 0
81 HD 148937 SB* 16 33 52.3867163783 -48 06 40.476619334 6.49 7.12 6.71 7.61   O6f?p 355 4
82 * tau Sco * 16 35 52.9528530 -28 12 57.661515 1.55 2.56 2.81 2.93 3.18 B0.2V 852 0
83 LBN 006.00+24.73 HII 16 35 56.8 -12 43 05           ~ 51 0
84 * zet Oph Be* 16 37 09.5390545 -10 34 01.529471 1.73 2.58 2.56 2.46 2.50 O9.2IVnn 1722 2
85 LDN 204 DNe 16 47 47.3 -12 05 16           ~ 50 0
86 HD 152003 s*b 16 52 47.3741588958 -41 47 08.991515676 6.90 7.47 7.08 6.72 6.35 O9.7IabNwk 108 1
87 HD 152235 s*b 16 53 58.8524252928 -41 59 39.573669251 6.47 6.92 6.38 5.84 5.42 B0.5Ia 175 0
88 * iot Oph PM* 16 54 00.4715122 +10 09 55.298255 3.98 4.30 4.38     B8V 98 0
89 HD 154811 * 17 09 53.0868663445 -47 01 53.192207532 6.71 7.32 6.98 7.71   OC9.7Ib 77 0
90 HD 154873 ** 17 10 20.83989 -46 44 18.2787           B1Ib 41 0
91 HD 155416 * 17 13 09.4240291597 -37 57 08.553876937 6.83 8.69 6.593 7.66   B8Iab/b 26 0
92 HD 155806 Be* 17 15 19.2484405697 -33 32 54.307297319 4.61 5.52 5.53     O7.5V((f))z(e) 206 0
93 HD 156385 WR* 17 19 29.9012727857 -45 38 23.874796927 6.55 6.97 6.92 8.11   WC7 152 0
94 HD 157038 s*b 17 22 39.2179048420 -37 48 16.698784191 6.99 7.20 6.44 5.70 5.15 B3Iap 100 0
95 * alf Oph ** 17 34 56.06945 +12 33 36.1346 2.32 2.22 2.07 1.93 1.85 A5IVnn 438 0
96 NGC 6475 OpC 17 53 51 -34 47.6           ~ 337 0
97 HD 163800 * 17 58 57.2583205084 -22 31 03.169198580 6.61 7.27 7.00 6.68 6.49 O7.5III((f)) 135 0
98 HD 163758 s*b 17 59 28.3670166132 -36 01 15.588119230 6.46 7.35 7.32 8.38   O6.5Iafp 144 0
99 HD 163745 * 17 59 40.8478355401 -41 29 13.396974215 5.93 6.409 6.505     B5II 25 0
100 * 15 Sgr s*b 18 15 12.9061049161 -20 43 41.787295583 4.64 5.42 5.37 5.27 5.19 O9.7Iab 232 0
101 HD 169454 s*b 18 25 15.1938696996 -13 58 42.305035144 7.39 7.61 6.71 5.82 5.13 B1Ia 307 0
102 HD 170235 Be* 18 29 21.9857960121 -25 15 23.781042052 5.98 6.66 6.59     B1Vnne 102 0
103 * kap Aql * 19 36 53.4495162 -07 01 38.917563 4.050 4.930 4.960 4.90 4.94 B0.5IIIn 323 0
104 * del Cyg PM* 19 44 58.4785413 +45 07 50.916066 2.75 2.85 2.87 2.88 2.90 A0IV 278 0
105 * 57 Aql B * 19 54 38.0631668134 -08 14 13.388904329   6.42 6.44     B8V 55 0
106 * alf Cyg sg* 20 41 25.91514 +45 16 49.2197 1.11 1.34 1.25 1.14 1.04 A2Ia 715 0
107 * lam Cyg ** 20 47 24.53766 +36 29 26.5737 3.93 4.43 4.54 4.58 4.69 B5V 294 0
108 * 20 Cap a2* 20 59 36.1395419983 -19 02 07.005308649   6.12 6.25     ApSi 78 0
109 * f01 Cyg Be* 20 59 49.5516391039 +47 31 15.378902421 3.77 4.71 4.75 4.62 4.63 B1.5Vnne 465 0
110 * ups Cyg Be* 21 17 55.0870156081 +34 53 48.769974820 3.50 4.32 4.42 4.37 4.45 B2Vne 300 0
111 * pi. Aqr Be* 22 25 16.6228499 +01 22 38.634579 3.64 4.60 4.64 4.48 4.48 B1III-IVe 383 0
112 * bet Scl PM* 23 32 58.2589788 -37 49 05.757000 3.92 4.28 4.37 4.37 4.44 B9.5IIIpHgMnSi 164 0
113 * i03 Aqr Pe* 23 51 21.3383201 -18 54 32.993729 4.62 5.04 5.18     A0VpSiSr 178 0

    Equat.    Gal    SGal    Ecl

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2020.05.25-01:02:05

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