2008MNRAS.388..105M


C.D.S. - SIMBAD4 rel 1.7 - 2020.01.29CET21:53:29

2008MNRAS.388..105M - Mon. Not. R. Astron. Soc., 388, 105-116 (2008/July-3)

Optical polarimetric study of open clusters: distribution of interstellar matter towards NGC 654.

MEDHI B.J., MAHESWAR G., PANDEY J.C., KUMAR T.S. and SAGAR R.

Abstract (from CDS):

We present new B,V and R linear polarimetric observations for 61 stars towards the region of the young open cluster NGC 654. In this study we found evidence for the presence of at least two layers of dust along the line of sight to the cluster. The distances to the two dust layers are estimated to be ∼200 pc and ∼1 kpc which are located much closer to the Sun than the cluster (∼2.4 kpc). Both the dust layers have their local magnetic field orientation nearly parallel to the direction of the Galactic plane. The foreground dust layer is found to have a ring morphology with the central hole coinciding with the centre of the cluster. The foreground dust grains are suggested to be mainly responsible for both the observed differential reddening and the polarization towards the cluster.

Abstract Copyright: © 2008 The Authors. Journal compilation © 2008 RAS

Journal keyword(s): polarization - dust, extinction - open clusters and associations: individual: NGC 654

Nomenclature: Tables 2, 4: Cl* NGC 654 MMP NN (Nos 1-61).

Simbad objects: 41

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Number of rows : 41

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+64 106 ** 00 57 36.6895910701 +64 51 34.908975189 10.82 11.01   10.21   B1V 51 0
2 BD+61 310 Be* 01 42 00.9286515353 +61 47 43.596258080 9.68 9.81 9.29     B3 20 0
3 LDN 1332 DNe 01 42.5 +62 03           ~ 5 0
4 BD+61 314 * 01 43 11.41216 +62 05 38.7023 9.2 9.53 9.45     B9III 15 0
5 LDN 1334 DNe 01 43.5 +61 57           ~ 5 0
6 NGC 654 21 * 01 43 39 +61 53.3   12.76 12.25     ~ 9 0
7 BD+61 315 *iN 01 43 43.3638418568 +61 50 03.560547963 10.8 10.32 9.54     A0Ib/II 34 1
8 NGC 654 18 * 01 43 46.4771736517 +61 52 51.509831150 13.22 13.14 12.44     B1V 13 0
9 NGC 654 24 * 01 43 49.9797100452 +61 54 14.844869148   14.77 13.83     ~ 9 0
10 NGC 654 3 * 01 43 51.4427003754 +61 51 11.188913367 11.99 12.11 11.39     B6:V 16 0
11 NGC 654 32 * 01 43 55.70184 +61 53 41.1216 13.88 13.91 13.18     B2V 12 0
12 NGC 654 69 * 01 43 59.1461984248 +61 55 18.754906290 14.06 13.62 12.70     B1V 15 0
13 NGC 654 OpC 01 44 00 +61 53.1   7.34 6.5     ~ 179 0
14 NGC 654 68 * 01 44 01.8936444782 +61 55 16.852464479 13.58 13.44 12.50     B1V 15 0
15 LS I +61 222 * 01 44 08.0414712936 +61 53 42.929534216 11.35 11.40 10.65 10.46   B2II 16 0
16 HD 10494 * 01 44 11.6161121791 +61 50 59.285704829 9.58 8.52 7.31     F5Ia 104 0
17 NGC 654 53 * 01 44 13.1098340205 +61 52 30.934377828 11.92 11.95 11.35     B5V 16 0
18 NGC 654 104 * 01 44 20.9659769447 +61 50 37.486671876 12.72 12.79 12.23     B1.5V 13 0
19 NGC 654 97 * 01 44 21.7381140591 +61 51 43.818751903 12.26 12.34 11.78     B6:V 15 0
20 NGC 654 96 * 01 44 23.0114461775 +61 52 13.079028325   14.83 14.17     ~ 8 0
21 [ABC90] cad 10 C* 01 44 45.0270744669 +61 55 48.082525877           C 5 0
22 2MASS J01444836+6155161 C* 01 44 48.3748005218 +61 55 16.035099992           ~ 4 0
23 BD+61 319 * 01 45 23.0667040356 +61 44 44.939908250   9.99 9.80     B8V 9 0
24 LDN 1337 DNe 01 45.5 +61 55           ~ 6 0
25 NGC 663 OpC 01 46 09 +61 14.1   7.78 7.1     ~ 235 0
26 HD 12021 * 01 57 56.1372381047 -02 05 57.709020147   8.79 8.85     B8V 27 0
27 TGU H853 P2 DNe 02 07.6 +76 05           ~ 3 0
28 HD 14069 * 02 16 45.1906517044 +07 41 10.686704586   9.21 9.06     A0 38 0
29 TGU H853 P1 DNe 02 25.9 +75 35           ~ 3 0
30 IC 1805 OpC 02 32 42 +61 27.0   7.03 6.5     ~ 469 2
31 V* CC Cas bL* 03 14 05.3362562931 +59 33 48.488947721 7.07 7.56 7.08     O8.5III(n)((f)) 265 0
32 HD 21447 * 03 30 00.1834708229 +55 27 06.513970075 5.160 5.140 5.090 5.01 5.02 A1Va 121 0
33 BD+52 913 WD* 05 05 30.6182785658 +52 49 51.920797126 10.25 11.44 11.69 11.93 12.108 DA.8 969 0
34 Cl Stock 16 OpC 13 19 29 -62 38.0   9.64 9.1     ~ 82 0
35 NGC 6167 OpC 16 34 34 -49 46.3   7.58 6.7     ~ 67 0
36 NGC 6193 OpC 16 41 20 -48 45.8           ~ 131 0
37 NGC 6204 OpC 16 46 08 -47 01.2   8.51 8.2     ~ 109 0
38 M 16 OpC 18 18 48 -13 48.4   6.58 6.0     ~ 925 2
39 BD+38 4058 * 20 23 28.5315419093 +39 20 59.034229956 12.02 11.81 10.62     B0V 34 0
40 HD 204827 SB* 21 28 57.7601719555 +58 44 23.223287944 8.63 8.74 7.94 7.25 6.76 O9.5IV 291 0
41 Cl* NGC 654 SAM 65 * ~ ~   13.83 13.31     ~ 3 0

    Equat.    Gal    SGal    Ecl

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2020.01.29-21:53:29

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