2011A&A...527A..34M


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.08CEST04:38:17

2011A&A...527A..34M - Astronomy and Astrophysics, volume 527A, 34-34 (2011/3-1)

Dust properties along anomalous extinction sightlines. II. Studying extinction curves with dust models.

MAZZEI P. and BARBARO G.

Abstract (from CDS):

Studies of the dust extinction in the Galaxy have found that the large majority of sight lines analyzed obey a simple relation depending on one parameter, the total-to-selective extinction coefficient, RV. Different values of RV are able to match the whole extinction curve in different environments, thus characterize normal extinction curves. However anomalous curves i.e, curves which deviate strongly from this simple behavior have been observed in the Galaxy as well as external galaxies. More than sixty curves with large ultraviolet deviations from their best-fit one-parameter curve are analyzed. The extinction curves are fitted with dust models to shed light on the properties of the grains along selected lines of sight, the processes affecting them, and their relations with the environmental characteristics. The extinction curve models are developed using the latest prescriptions for grain-size distributions capable of describing one-parameter curves for RV values from 3.1 to 5.5. These models, extended here down to RV=2.0, allow us to compare the resulting properties of our deviating curves with those of normal curves in a self-consistent framework, and thus to recover the relative trends overcoming the modeling uncertainties. In addition to 20 anomalous curves extracted from the same sample for study in a previous paper and revised here to account for the latest updates, these curves represent the largest, homogeneous sample of anomalous curves studied so far with dust models. Our results show that the ultraviolet deviations are driven by a larger amount of small grains than predicted for lines of sight where extinction depends on only one parameter. Moreover, the dust-to-gas ratios of anomalous curves are lower than the same values for no deviating lines of sight. Both shocks and grain-grain collisions should destroy dust grains, hence reduce the amount of the dust trapped in the grains, modify the size distribution of the dust, and increase the small-to-large grain size ratio. Therefore, the extinction properties derived should correspond to sight lines where shocks and high velocity flows perturb the physical state of the interstellar medium and leave their signature on the dust properties.

Abstract Copyright:

Journal keyword(s): dust, extinction - ISM: clouds - open clusters and associations: general - galaxies: ISM

CDS comments: Paragraph 5.2 189.876+0.156 is a misprint for [KCW94] 189.876+0.516

Simbad objects: 86

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Number of rows : 86

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 BD+62 2353 * 00 02 22.7089329366 +62 54 03.186809857 9.54 10.07 9.9     B1II 16 0
2 BD+59 2829 Be* 00 06 48.3056216402 +60 36 00.846196231 9.59 10.14 9.9     B0 29 0
3 V* AO Cas WU* 00 17 43.0629024684 +51 25 59.115602831 5.04 6.01 6.14     O9.2II+O8V((f)) 317 0
4 HD 2619 * 00 30 28.3296278605 +65 16 19.762587240 8.44 8.78 8.33     B0.5III 36 0
5 BD+63 89 Em* 00 45 12.8497082534 +64 23 30.732743199 9.69 10.054 9.502 9.26   B1Ib 25 0
6 NAME SMC G 00 52 38.0 -72 48 01   2.79 2.2     ~ 9440 1
7 BD+57 252 * 01 19 34.1801122565 +58 15 22.131318548 9.2 9.77 9.51     B1IV 39 0
8 BD+59 273 * 01 33 28.2063293688 +60 37 48.156083919 8.74 9.22 9.03     B5 27 0
9 BD+58 310 * 01 50 30.3491122864 +59 14 49.693569555 9.89 10.29 10.17     B1V 13 0
10 BD+62 338 ** 02 02 11.4434705798 +62 50 31.066125932 8.76   9.47 9.32   B3.0III 26 0
11 HD 12323 SB* 02 02 30.1267578900 +55 37 26.377362418 7.95 8.87 8.92     ON9.2V 167 0
12 HD 14357 * 02 21 10.4365423029 +56 51 56.342772181 8.31 8.83 8.4988 8.21 8.0630 B2.0I 68 0
13 NGC 884 OpC 02 22 23 +57 07.5           ~ 445 0
14 BD+56 586 bC* 02 22 36.2965294434 +57 04 54.389426632 9.60 10.19 9.9630     B1V 38 0
15 HD 14707 V* 02 24 28.0908212269 +58 18 02.557738979 10.02 10.46 9.94     B0.5IIIv 27 0
16 HD 14734 * 02 24 39.2407108986 +57 12 59.581584388   9.63 9.53     B0.5V 10 0
17 NAME Magellanic Clouds GrG 03 00 -71.0           ~ 5665 1
18 HD 21455 Be* 03 29 26.2865159828 +46 56 16.317222688   6.305 6.217 7.27   B7Vne 93 0
19 NAME Per Arm PoG 03 30 +45.0           ~ 1247 0
20 Ass Cam OB 1 As* 03 31.6 +58 38           ~ 87 0
21 HD 28262 * 04 27 08.5013896978 -08 53 54.772172960   8.61 8.57     A0V 7 0
22 * 1 Cam Pu* 04 32 01.84227 +53 54 39.0450 6.41 5.876 5.772     B0III+B0IV/V 95 1
23 HD 282622 * 04 57 47.0241219335 +30 31 56.517065280   11.95 10.74     A3 3 0
24 HD 282727 * 04 58 33.5071961699 +30 41 51.522346550 9.56 9.60 9.22 9.33   B1.5V 16 0
25 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 14826 1
26 M 1 SNR 05 34 31.94 +22 00 52.2           ~ 5594 4
27 M 43 HII 05 35 31 -05 16.2           ~ 160 0
28 HD 37061 Or* 05 35 31.3653515656 -05 16 02.586154009 6.44 7.09 6.83     O9V 320 0
29 HD 37767 * 05 42 41.4767244128 +36 08 59.441226563 8.61 9.03 8.93     B3V 38 0
30 HD 38658 * 05 48 41.3352716443 +28 19 28.530258282 7.96 8.50 8.37     B3II 36 0
31 HD 39136 * 05 51 54.7753629759 +32 14 23.117799102 8.44 8.88 8.77     B3III 27 0
32 HD 248893 * 05 54 01.7787331417 +22 06 29.419920942 9.57 10.00 9.75     B0III 24 0
33 HD 41831 * 06 08 20.6244127372 +22 12 29.687742999   9.27 9.12     B3V 17 0
34 HD 252325 * 06 09 00.3114582703 +20 38 25.889542478 10.94 11.2 10.79     O9V(n) 54 0
35 NGC 2175 OpC 06 09 39 +20 29.2   7.0 6.8     ~ 247 3
36 HD 253327 Y*O 06 12 44.1772236174 +17 59 14.252398680 10.93 11.30 10.75 10.57   OB 28 0
37 GAL 192.58-00.04 HII 06 12 53 +18 00.4           ~ 23 0
38 HD 46867 * 06 35 55.1396976220 +05 18 35.194585000 7.88 8.52 8.30     B0.5III-IV 39 0
39 HD 54439 * 07 08 23.1959336829 -11 51 08.563720611 6.98 7.73 7.68 8.58   B2/3II 50 0
40 HD 73420 * 08 36 37.1157386720 -44 04 48.161720634 8.23 9.41 9.33 9.47   B2II/III 36 0
41 Ass Vel OB 1 As* 08 49.9 -45 00           ~ 93 0
42 V* GP Vel HXB 09 02 06.8610736194 -40 33 16.896402010 6.85 7.37 6.87 6.31 6.05 B0.5Ia 1373 0
43 HD 78785 * 09 08 24.0916904631 -46 15 13.235826313 8.70 9.11 8.60 8.04 7.65 B2II 39 0
44 HD 96042 Em* 11 03 40.5635485636 -59 25 59.085728622 7.63 8.41 8.23 9.26   B1(V)ne 58 0
45 HD 137569 pA* 15 26 20.8167463866 +14 41 36.332336994   7.86 7.91     B9Iab:p 94 0
46 HD 141318 Pu* 15 51 06.8044833762 -55 03 19.931264880 5.13 5.756 5.767 7.08   B2III 80 0
47 HD 149452 * 16 37 10.5111462999 -47 07 49.828797072 9.2 10.39 9.40 9.54 8.73 O9IVn 45 0
48 NGC 6193 OpC 16 41 20 -48 45.8           ~ 132 0
49 GUM 55 HII 16 53 -42.2           ~ 25 0
50 HD 326327 Be* 16 53 39.0779134817 -41 47 48.022188474 9.372 9.969 9.729 10.03 9.312 B1.5Ve 46 0
51 HD 152245 * 16 54 00.4795665238 -40 31 58.153117466 7.71 8.49 8.37     B0Ib 51 0
52 HD 152853 * 16 58 07.9286774182 -45 58 56.457362685 7.35 8.05 7.94 8.78   B2III 36 0
53 HD 156233 * 17 18 26.1396232899 -42 55 54.682820328 8.93 9.49 9.18 9.59   B0 17 0
54 HD 161061 V* 17 44 37.0242872004 -28 10 40.848126910 8.93 9.24 8.47 9.10   B0Ib/II 30 0
55 HD 164492 ** 18 02 23.54916 -23 01 50.9468 6.49 7.49 6.80     O7.5Vz+A2Ia 193 0
56 HD 168021 * 18 18 43.2458116584 -18 37 10.606392084 6.46 7.08 6.86 7.64   B0Ia/ab 79 0
57 BD+31 3235 * 18 18 47.8 +31 57 24           ~ 1 0
58 HD 168137 SB* 18 18 56.1894792010 -13 48 31.090538024 8.72 9.36 8.94 9.55   O8Vz 106 0
59 HD 168894 * 18 22 41.5232286809 -14 38 34.151491733 9.65 10.16 9.28 9.70   B0Ia 28 0
60 HD 168785 * 18 22 45.9035824994 -30 08 26.179530276 7.79 8.52 8.51 9.40   B2II 64 0
61 HD 173251 * 18 44 52.6217655521 -14 21 11.225142068 9.48 9.78 9.15 9.54   B1/2Ib 20 0
62 NAME Vul Rift MoC 19 36 53 +23 04.7           ~ 22 0
63 NGC 6823 OpC 19 43 09 +23 18.0   7.71 7.1     ~ 249 2
64 HD 344784 * 19 43 10.9719577986 +23 17 45.384602794 9.38 9.90 9.34     O6.5V((f)) 88 0
65 HD 344880 * 19 45 42.3144340618 +23 59 04.029300492 9.76 9.96 9.34     B0.5III:nn 25 0
66 HD 344894 * 19 45 48.2144484716 +23 11 42.751268633 9.42 9.88 9.61     B5 25 0
67 HD 345214 ** 19 53 45.98761 +22 36 34.0413   9.88 9.58 9.64   B3 19 0
68 HD 226868 HXB 19 58 21.6758193269 +35 12 05.782512305 9.38 9.72 8.91 8.42   O9.7Iabpvar 3923 0
69 HD 191396 * 20 08 19.1403267658 +38 07 50.420917958 7.64 8.30 8.12     B0.5II 42 0
70 HD 191611 V* 20 09 26.0772669969 +36 29 19.593420179 8.36 8.87 8.57     B0.5III 29 0
71 SIM 55 ISM 20 14 49 +39 09.2           ~ 9 0
72 HD 229049 * 20 21 01.3528188335 +39 00 52.020787243 9.66 10.04 9.67     B2III:p 24 0
73 HD 194092 * 20 22 05.4432182734 +40 59 08.169817962 7.66 8.37 8.28     B0.5III 51 0
74 BD+45 3341 * 20 57 02.6795120054 +46 32 44.684749491 8.73 9.11 8.73     B1II 26 0
75 BD+52 3122 ** 22 08 46.93 +52 58 27.6           ~ 21 0
76 V* V448 Cep SB* 22 12 09.7590400451 +53 41 55.626337256 9.45 9.84 9.62     B3II: 28 0
77 HD 211880 * 22 18 27.8027027819 +63 13 22.447833668 7.47 7.99 7.75     B0.5V 88 0
78 BD+60 2380 * 22 19 02.8195461812 +60 46 01.369703635 8.93 9.36 9.06     B2III 19 0
79 BD+57 2525 Be* 22 25 03.6637646674 +57 50 29.728586494 10.01 10.47 10.23     B1.5IV-V:ep 32 2
80 BD+55 2770 * 22 33 45.5228162910 +56 31 58.770526302 9.51 10.02 9.76     B1.5III 16 0
81 HD 216248 * 22 50 18.6301026367 +58 39 37.761482514 9.92 10.24 9.9     B2 19 0
82 HD 217035 bC* 22 56 30.907 +62 52 06.99 7.66 8.20 7.7     B0.5Vn+B0.5V 93 0
83 BD+62 2142 * 22 58 03.9327705675 +63 21 44.725744003   9.30 9.04     B5V 18 0
84 BD+62 2154 * 23 00 32.1570205523 +63 30 58.860363905 9.42 9.76 9.33     B1V 33 0
85 HD 218323 * 23 05 56.7067559556 +64 17 42.543912369 7.82 8.11 7.6     B5 55 0
86 BD+63 1964 * 23 17 21.5627349678 +64 07 16.166348285 8.79 9.05 8.5     B0 75 0

    Equat.    Gal    SGal    Ecl

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2020.07.08-04:38:17

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