2017AJ....153..156C

Query : 2017AJ....153..156C

2017AJ....153..156C - Astron. J., 153, 156-156 (2017/April-0)

Extinction in the star cluster SAI 113 and Galactic structure in Carina.

CARRARO G., TURNER D.G., MAJAESS D.J., BAUME G.L., GAMEN R. and MOLINA LERA J.A.

Abstract (from CDS):

Photometric CCD UB VIC photometry obtained for 4860 stars surrounding the embedded southern cluster SAI 113 (Skiff 8) is used to examine the reddening in the field and derive the distance to the cluster and nearby van Genderen 1. Spectroscopic color excesses for bright cluster stars, photometric reddenings for A3 dwarfs, and dereddening of cluster stars imply that the reddening and extinction laws match results derived for other young clusters in Carina: EU–B/EB–V≃0.64 and RV≃4. SAI 113 displays features that may be linked to a history of dynamical interactions among member stars: possible circumstellar reddening and rapid rotation of late B-type members, ringlike features in star density, and a compact core, with most stars distributed randomly across the field. The group van Genderen 1 resembles a stellar asterism, with potential members distributed randomly across the field. Distances of 3.90 ± 0.19 kpc and 2.49 ± 0.09 kpc are derived for SAI 113 and van Genderen 1, respectively, with variable reddenings EB–V ranging from 0.84 to 1.29 and 0.23 to 1.28. The SRC variables CK Car and EV Car may be outlying members of van Genderen 1, thereby of use for calibrating the period-luminosity relation for pulsating M supergiants. More importantly, the anomalous reddening and extinction evident in Carina and nearby regions of the Galactic plane in the fourth quadrant impact the mapping of spiral structure from young open clusters. The distribution of spiral arms in the fourth quadrant may be significantly different from how it is often portrayed.

Abstract Copyright: © 2017. The American Astronomical Society. All rights reserved.

Journal keyword(s): dust, extinction - Galaxy: structure - Hertzsprung-Russell and C-M diagrams - open clusters and associations: individual: (SAI 113, van Genderen 1) - stars: distances - stars: distances

Simbad objects: 72

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Number of rows : 72
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 18391 s*y 02 59 48.7225501080 +57 39 47.673472140 10.56 8.83 6.89     G5Ia-Ib 113 0
2 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
3 Cl Collinder 70 OpC 05 35 30 -01 06.0           ~ 65 0
4 * eps Ori s*b 05 36 12.81335 -01 12 06.9089 0.48 1.51 1.69 1.76 1.93 B0Ia 921 0
5 SA 98- reg 06 52 04.1 -00 23 58           ~ 179 0
6 NAME Puppis reg 07 40 -28.0           ~ 108 0
7 Cl Waterloo 3 OpC 07 55 06.0 -25 21 54           ~ 11 0
8 V* AQ Pup cC* 07 58 22.0887499032 -29 07 48.338631084   9.70 8.54   7.175 F5-G2Ib 212 0
9 NAME Vela SNR 08 34.0 -45 50           ~ 1331 2
10 Cl Pismis 11 OpC 09 15 53.6 -50 00 26           ~ 38 1
11 Cl Ruprecht 79 OpC 09 41 04.1 -53 50 33           ~ 89 0
12 NAME Car Arm PoG 10 00 -60.0           ~ 471 1
13 NGC 3105 OpC 10 00 41.0 -54 47 20   10.73 9.7     ~ 47 0
14 NGC 3114 OpC 10 01 55.0 -60 02 16   4.47 4.2     ~ 213 0
15 [KPR2004b] 235 OpC 10 03 12.0 -58 09 00           ~ 16 0
16 Cl Loden 27 OpC 10 11 02 -56 35.2           ~ 11 0
17 [KPR2005] 58 OpC 10 14 01.8 -55 06 13           ~ 53 0
18 NGC 3199 HII 10 16 32.8 -57 56 02           ~ 70 1
19 V* EV Car s*r 10 20 21.6001332600 -60 27 15.749335152   10.00 9.20     M4.5Ia 74 0
20 NAME van Genderen 1 Cl* 10 22 29.0 -59 38 30           ~ 1 0
21 2MASS J10223910-5931080 * 10 22 39.1001721528 -59 31 08.073641676 14.39 14.62 13.88     B1.5Vn 5 0
22 HD 90137 * 10 22 39.3453002352 -59 31 15.350753424   10.12 10.13     B9/A0V 8 0
23 GSC 08612-00589 * 10 22 40.9588843872 -59 30 30.588078600   12.69 11.99     O7V((f))z 10 0
24 SAI 113 OpC 10 22 42.5 -59 30 44           ~ 18 0
25 CD-58 3214 * 10 22 43.7713603128 -59 30 18.220980420   12.65 11.86     O8V(n) 8 0
26 GSC 08612-00079 * 10 22 44.0828224272 -59 30 04.049960148   14.30 13.4     ~ 2 0
27 THA 35-II-33 Em* 10 22 44.4064542888 -59 29 39.412235112   13.50 12.63     B1Vnne 8 0
28 2MASS J10224587-5932420 * 10 22 45.8690661840 -59 32 42.009518652 14.56 14.71 13.94     B2.5Vn 4 0
29 HD 90177 s*b 10 22 53.8430096928 -59 37 28.363616256 9.16 9.66 8 8.15   LBV 342 0
30 Cl Westerlund 2 OpC 10 23 58.1 -57 45 49           ~ 400 0
31 V* CK Car s*r 10 24 25.3598323512 -60 11 29.042707056   9.63 7.59     M3.5Iab 63 0
32 HD 90454 PM* 10 24 59.4178938240 -58 34 34.688140392   6.27 5.93     F2II/III 34 0
33 IC 2581 OpC 10 27 29.3 -57 37 31   4.79 4.3     ~ 143 0
34 C 1027-604 OpC 10 29 08 -60 44.7           ~ 10 0
35 Cl Ruprecht 90 OpC 10 31 00 -58 27.0           ~ 22 0
36 Cl Loden 112 OpC 10 32 20 -56 41.7           ~ 17 0
37 NGC 3293 OpC 10 35 50.3 -58 14 04           ~ 327 0
38 NGC 3324 OpC 10 37 20.8 -58 37 26           ~ 145 1
39 Cl Trumpler 14 OpC 10 43 56.0 -59 33 07   5.70 5.5     ~ 547 0
40 Cl Collinder 228 OpC 10 44 00 -60 05.2           ~ 211 0
41 Cl Collinder 232 OpC 10 44 39.00 -59 33 36.0           ~ 72 0
42 Cl Trumpler 15 OpC 10 44 43.6 -59 22 07           ~ 229 0
43 Cl Trumpler 16 OpC 10 45 01.9 -59 42 00           ~ 510 0
44 NGC 3372 HII 10 45 02.23 -59 41 59.8           ~ 1071 2
45 * eta Car s*b 10 45 03.545808 -59 41 03.95124 6.37 7.03 6.48 6.123 4.41 LBV 2543 0
46 Cl Ruprecht 91 OpC 10 47 45.3 -57 29 41           ~ 51 0
47 V* UY Sex HS* 10 50 02.8265487864 -00 00 36.879009588 12.063 13.184 13.474 13.606 13.769 sdO9VIIHe6 175 0
48 Cl Collinder 236 OpC 10 57 22 -61 07.2           ~ 29 0
49 Cl Sher 1 OpC 11 01 01.9 -60 13 57   9.14 8.8     ~ 42 0
50 Cl Pismis 17 OpC 11 01 30 -59 52.4   9.63 9.4     ~ 49 0
51 Cl Ruprecht 93 OpC 11 04 11.3 -61 21 59   8.05 7.7     ~ 48 1
52 NAME Shorlin 1 OpC 11 05 46 -61 13.9           ~ 20 0
53 [MS70] 8 WR* 11 05 46.42920 -61 13 48.7524     14.66 14.713   WC4 41 0
54 WR 38a WR* 11 05 48.9639107880 -61 13 41.352428748 16.33 16.27 15.12     WN5o 16 0
55 Cl Loden 306 OpC 11 06 08 -61 06.0           ~ 21 0
56 Cl Feinstein 1 OpC 11 06 43 -59 49.2   4.84 4.7     ~ 39 0
57 NGC 3572 OpC 11 10 32.2 -60 17 23           ~ 96 0
58 NGC 3766 OpC 11 36 13.5 -61 36 42   5.66 5.3     ~ 222 0
59 NGC 4103 OpC 12 06 35.0 -61 14 47     7.4     ~ 104 1
60 Cl Hogg 15 OpC 12 43 36.8 -63 06 01           ~ 61 0
61 ACO 3526 ClG 12 48 49.2 -41 18 17           ~ 1154 2
62 NGC 4755 OpC 12 53 39.2 -60 22 07           ~ 300 0
63 Cl Stock 16 OpC 13 19 26.4 -62 37 19           ~ 95 0
64 Cl Hogg 16 OpC 13 29 18 -61 12.0           ~ 69 0
65 Cl Collinder 272 OpC 13 30 19.1 -61 18 59   8.25 7.7     ~ 70 0
66 NAME Car-Sgr Arm PoG 15 00 -40.0           ~ 581 1
67 NGC 6383 OpC 17 34 41.6 -32 34 27           ~ 168 0
68 M 16 OpC 18 18 45.1 -13 47 31           ~ 1084 1
69 NAME Sgr Arm PoG 19 00 -30.0           ~ 710 1
70 Cl Roslund 3 OpC 19 58 49.3 +20 30 18           ~ 58 0
71 NAME Carina Region reg ~ ~           ~ 192 0
72 NAME Crux Region reg ~ ~           ~ 18 0

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