2015ApJ...798L..27S

Query : 2015ApJ...798L..27S

2015ApJ...798L..27S - Astrophys. J., 798, L27 (2015/January-2)

A possible extension of the Scutum-Centaurus Arm into the outer second quadrant.

SUN Y., XU Y., YANG J., LI F.-C., DU X.-Y., ZHANG S.-B. and ZHOU X.

Abstract (from CDS):

Combining H I data from the Canadian Galactic Plane Survey and CO data from the Milky Way Imaging Scroll Painting project, we have identified a new segment of a spiral arm between Galactocentric radii of 15 and 19 kpc that apparently lies beyond the Outer Arm in the second Galactic quadrant. Over most of its length, the arm is 400-600 pc thick in z. The new arm appears to be the extension of the distant arm recently discovered by Dame & Thaddeus as well as the Scutum-Centaurus Arm into the outer second quadrant. Our current survey identified a total of 72 molecular clouds with masses on the order of 102-104 M☉ that probably lie in the new arm. When all of the available data from the CO molecular clouds are fit, the best-fitting spiral model gives a pitch angle of 9.°3±0.°7.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: structure - ISM: molecules - radio lines: ISM

VizieR on-line data: <Available at CDS (J/ApJ/798/L27): table1.dat>

Nomenclature: Table 1: [SXY2015] NN (Nos 1-72).

Simbad objects: 76

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Number of rows : 76
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 [SXY2015] 24 MoC 00 00 18 +64 01.1           ~ 2 0
2 [SXY2015] 26 MoC 00 04 25 +65 51.0           ~ 2 0
3 [SXY2015] 27 MoC 00 32 03 +65 33.2           ~ 2 0
4 [SXY2015] 28 MoC 00 36 25 +65 32.1           ~ 2 0
5 [SXY2015] 29 MoC 00 39 36 +64 53.1           ~ 2 0
6 [SXY2015] 30 MoC 00 40 32 +65 54.0           ~ 3 0
7 [SXY2015] 31 MoC 00 42 25 +64 41.8           ~ 2 0
8 [SXY2015] 32 MoC 00 46 14 +64 38.5           ~ 2 0
9 [SXY2015] 33 MoC 00 47 12 +65 27.6           ~ 2 0
10 [SXY2015] 34 MoC 00 49 56 +65 23.6           ~ 4 0
11 [SXY2015] 35 MoC 00 55 29 +64 31.6           ~ 2 0
12 [SXY2015] 36 MoC 00 58 25 +65 41.7           ~ 2 0
13 [SXY2015] 37 MoC 01 01 12 +66 00.7           ~ 2 0
14 [SXY2015] 38 MoC 01 04 43 +65 50.2           ~ 2 0
15 [SXY2015] 39 MoC 01 05 24 +66 12.0           ~ 2 0
16 [SXY2015] 40 MoC 01 07 14 +66 13.4           ~ 2 0
17 [SXY2015] 41 MoC 01 11 51 +65 09.7           ~ 2 0
18 [SXY2015] 42 MoC 01 31 41 +65 07.5           ~ 2 0
19 [SXY2015] 43 MoC 01 37 45 +64 35.6           ~ 2 0
20 [SXY2015] 44 MoC 01 45 57 +65 06.0           ~ 2 0
21 [SXY2015] 45 MoC 01 57 14 +64 04.0           ~ 2 0
22 [SXY2015] 46 MoC 02 04 14 +63 14.9           ~ 2 0
23 [SXY2015] 47 MoC 02 05 06 +63 04.8           ~ 2 0
24 [SXY2015] 48 MoC 02 08 24 +62 52.4           ~ 2 0
25 [SXY2015] 49 MoC 02 13 48 +60 51.6           ~ 2 0
26 [SXY2015] 50 MoC 02 20 48 +60 12.7           ~ 2 0
27 [SXY2015] 51 MoC 02 22 55 +60 54.3           ~ 2 0
28 [SXY2015] 53 MoC 02 44 47 +58 31.7           ~ 2 0
29 [SXY2015] 54 MoC 02 46 01 +58 19.3           ~ 2 0
30 [SXY2015] 55 MoC 02 46 51 +58 19.0           ~ 2 0
31 [SXY2015] 57 MoC 02 48 27 +58 23.5           ~ 4 0
32 [SXY2015] 56 MoC 02 48 38 +58 28.4           ~ 4 0
33 [SXY2015] 52 MoC 02 51 05 +61 09.1           ~ 2 0
34 [SXY2015] 58 MoC 02 53 17 +58 19.3           ~ 2 0
35 [SXY2015] 59 MoC 02 56 06 +57 25.6           ~ 2 0
36 [SXY2015] 60 MoC 03 07 40 +58 41.5           ~ 2 0
37 [SXY2015] 61 MoC 03 09 27 +58 25.8           ~ 2 0
38 [SXY2015] 62 MoC 03 12 25 +58 04.4           ~ 2 0
39 [SXY2015] 63 MoC 03 15 58 +58 06.6           ~ 2 0
40 [SXY2015] 64 MoC 03 22 12 +57 23.8           ~ 2 0
41 [SXY2015] 65 MoC 03 25 21 +57 10.7           ~ 2 0
42 NAME Per Arm PoG 03 30 +45.0           ~ 1672 0
43 [SXY2015] 67 MoC 03 31 29 +56 49.2           ~ 2 0
44 [SXY2015] 70 MoC 03 35 09 +53 37.3           ~ 2 0
45 [SXY2015] 66 MoC 03 35 44 +57 59.2           ~ 2 0
46 [SXY2015] 71 MoC 03 35 46 +53 40.7           ~ 2 0
47 [SXY2015] 68 MoC 03 36 37 +56 43.1           ~ 2 0
48 [SXY2015] 72 MoC 03 37 10 +53 36.6           ~ 2 0
49 [SXY2015] 69 MoC 03 37 33 +55 07.7           ~ 2 0
50 NAME Car-Sgr Arm PoG 15 00 -40.0           ~ 581 1
51 NAME Outer Arm PoG 21 48 +69.4           ~ 370 0
52 [SXY2015] 1 MoC 21 58 09 +58 39.3           ~ 2 0
53 [SXY2015] 2 MoC 21 59 53 +58 31.5           ~ 2 0
54 [SXY2015] 3 MoC 22 01 49 +58 39.7           ~ 2 0
55 [SXY2015] 5 MoC 22 05 58 +59 45.7           ~ 2 0
56 [SXY2015] 4 MoC 22 07 08 +58 51.0           ~ 2 0
57 [SXY2015] 6 MoC 22 09 43 +59 34.0           ~ 2 0
58 [SXY2015] 7 MoC 22 15 55 +60 39.0           ~ 4 0
59 [SXY2015] 9 MoC 22 18 36 +60 41.9           ~ 2 0
60 [SXY2015] 8 MoC 22 19 00 +60 33.0           ~ 2 0
61 [SXY2015] 10 MoC 22 23 07 +61 56.6           ~ 2 0
62 [SXY2015] 11 MoC 22 36 56 +61 46.0           ~ 2 0
63 [SXY2015] 12 MoC 22 42 21 +60 57.3           ~ 2 0
64 [SXY2015] 15 MoC 22 50 30 +62 17.2           ~ 2 0
65 [SXY2015] 13 MoC 22 50 33 +61 53.3           ~ 2 0
66 [SXY2015] 16 MoC 22 51 36 +62 18.8           ~ 3 0
67 [SXY2015] 14 MoC 22 52 00 +61 45.0           ~ 4 0
68 [SXY2015] 17 MoC 22 52 20 +62 27.5           ~ 2 0
69 [SXY2015] 18 MoC 22 53 25 +62 32.3           ~ 4 0
70 [SXY2015] 19 MoC 22 53 52 +62 58.2           ~ 2 0
71 [SXY2015] 20 MoC 22 56 08 +62 45.7           ~ 2 0
72 [SXY2015] 21 MoC 23 36 14 +62 23.5           ~ 4 0
73 [SXY2015] 22 MoC 23 49 06 +63 16.7           ~ 2 0
74 [SXY2015] 23 MoC 23 50 41 +65 40.7           ~ 2 0
75 [SXY2015] 25 MoC 23 57 56 +66 15.8           ~ 2 0
76 NAME Sct-Cen PoG ~ ~           ~ 286 0

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