2013ApJ...771...39F

Query : 2013ApJ...771...39F

2013ApJ...771...39F - Astrophys. J., 771, 39 (2013/July-1)

The 300 km/s stellar stream near Segue 1: insights from high-resolution spectroscopy of its brightest star.

FREBEL A., LUNNAN R., CASEY A.R., NORRIS J.E., WYSE R.F.G. and GILMORE G.

Abstract (from CDS):

We present a chemical abundance analysis of 300S-1, the brightest likely member star of the 300 km/s stream near the faint satellite galaxy Segue 1. From a high-resolution Magellan/MIKE spectrum, we determine a metallicity of [Fe/H] = -1.46±0.05±0.23 (random and systematic uncertainties) for star 300S-1, and find an abundance pattern similar to typical halo stars at this metallicity. Comparing our stellar parameters to theoretical isochrones, we estimate a distance of 18±7 kpc. Both the metallicity and distance estimates are in good agreement with what can be inferred from comparing the Sloan Digital Sky Survey photometric data of the stream stars to globular cluster sequences. While several other structures overlap with the stream in this part of the sky, the combination of kinematic, chemical, and distance information makes it unlikely that these stars are associated with either the Segue 1 galaxy, the Sagittarius Stream, or the Orphan Stream. Streams with halo-like abundance signatures, such as the 300 km/s stream, present another observational piece for understanding the accretion history of the Galactic halo.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: halo - Galaxy: kinematics and dynamics - stars: abundances

Nomenclature: Table 1: [FLC2013] 300S-NN (Nos 1-52).

Simbad objects: 62

goto Full paper

goto View the references in ADS

Number of rows : 62
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 NAME Sagittarius Stream St* 02 22 +00.0           ~ 1001 0
2 BD-01 1792 PM* 07 39 50.1120068643 -01 31 20.376529550 10.35 10.05 9.23     G6V 113 0
3 HD 83212 Pe* 09 36 19.9521173088 -20 53 14.747509716   9.582 9.177 7.83   G6/K0IIIwF7 144 0
4 [FLC2013] 300S-7 * 10 05 30.5933055816 +15 54 18.170475984           ~ 3 0
5 [FLC2013] 300S-12 * 10 06 00.1713611280 +16 05 18.597538140           ~ 2 0
6 [FLC2013] 300S-6 * 10 06 12.0149836968 +15 45 48.527470476           ~ 2 0
7 SDSS J100618.74+160338.9 * 10 06 18.742 +16 03 38.97           ~ 2 0
8 [FLC2013] 300S-5 * 10 06 19.9483059480 +15 46 12.760464216           ~ 1 0
9 SDSS J100619.98+160042.1 * 10 06 19.987 +16 00 42.16           ~ 2 0
10 SDSS J100625.69+155422.0 * 10 06 25.696 +15 54 22.06           ~ 2 0
11 [FLC2013] 300S-8 * 10 06 27.7292293200 +15 54 08.647883208           ~ 1 0
12 [FLC2013] 300S-50 * 10 06 28.4043365232 +15 56 28.823129592           ~ 3 0
13 SDSS J100630.89+161512.0 * 10 06 30.889 +16 15 12.05           ~ 2 0
14 SDSS J100642.75+155709.3 * 10 06 42.756 +15 57 09.31           ~ 2 0
15 [FLC2013] 300S-17 * 10 06 46.7779164408 +16 06 08.353087992           ~ 2 0
16 [FLC2013] 300S-9 * 10 06 47.7391722648 +16 13 30.246524832           ~ 1 0
17 [FLC2013] 300S-18 * 10 06 48.5161938960 +16 09 58.198631580           ~ 2 0
18 SDSS J100650.82+160351.1 * 10 06 50.825 +16 03 51.20           ~ 3 0
19 SDSS J100651.73+161759.2 * 10 06 51.737 +16 17 59.24           ~ 2 0
20 [FLC2013] 300S-4 * 10 06 51.8030258976 +15 49 41.621596176           ~ 1 0
21 SDSS J100654.22+155520.7 * 10 06 54.225 +15 55 20.73           ~ 2 0
22 SDSS J100656.13+160659.9 * 10 06 56.133 +16 06 59.96           ~ 2 0
23 [FLC2013] 300S-10 * 10 06 58.4883264096 +16 20 45.646171116           ~ 3 0
24 SDSS J100658.53+155748.9 * 10 06 58.538 +15 57 48.94           ~ 2 0
25 [FLC2013] 300S-3 * 10 06 59.0080965720 +15 44 18.935932524           ~ 3 0
26 NAME Segue 1 G 10 07 03.2 +16 04 25     15.3     ~ 517 1
27 [FLC2013] 300S-23 * 10 07 04.5802755816 +16 01 30.835018056           ~ 1 0
28 SDSS J100704.62+160812.5 * 10 07 04.6188877416 +16 08 12.629774796           ~ 2 0
29 [FLC2013] 300S-48 * 10 07 07.7939299680 +16 07 21.558654156           ~ 2 0
30 SDSS J100708.37+155646.2 * 10 07 08.372 +15 56 46.28           ~ 2 0
31 SDSS J100709.06+160436.5 * 10 07 09.064 +16 04 36.57           ~ 2 0
32 [FLC2013] 300S-27 * 10 07 09.7460031864 +15 53 12.384487104           ~ 3 0
33 SDSS J100711.79+160630.3 * 10 07 11.794 +16 06 30.35           ~ 2 0
34 SDSS J100712.96+155734.8 * 10 07 12.9627833712 +15 57 34.910551044           G0V 4 0
35 SDSS J100713.68+160444.8 * 10 07 13.685 +16 04 44.81           ~ 3 0
36 [FLC2013] 300S-30 * 10 07 15.5080769592 +16 05 52.184457996           ~ 2 0
37 [FLC2013] 300S-31 * 10 07 15.5253307584 +16 15 19.100822652           ~ 2 0
38 SDSS J100717.14+160511.9 * 10 07 17.148 +16 05 11.92           ~ 2 0
39 [FLC2013] 300S-33 * 10 07 17.3644375368 +16 03 55.653274296           ~ 3 0
40 2MASS J10071996+1601377 * 10 07 20.0035914384 +16 01 37.795331892           F8III 4 0
41 [FLC2013] 300S-35 * 10 07 21.1698716688 +16 11 18.280805208           ~ 2 0
42 [FLC2013] 300S-36 * 10 07 21.7674909120 +15 54 24.538652856           ~ 2 0
43 [FLC2013] 300S-37 * 10 07 29.5798308168 +16 11 07.228908312           ~ 2 0
44 SDSS J100732.47+160500.5 * 10 07 32.471 +16 05 00.53           ~ 3 0
45 [FLC2013] 300S-39 * 10 07 34.9701646920 +15 54 31.556272752           ~ 2 0
46 [FLC2013] 300S-49 * 10 07 35.2093690272 +15 57 15.191772408           ~ 2 0
47 SDSS J100735.91+161125.6 * 10 07 35.918 +16 11 25.64           ~ 2 0
48 SDSS J100736.91+155958.8 * 10 07 36.917 +15 59 58.87           ~ 2 0
49 [FLC2013] 300S-40 * 10 07 37.3244564640 +16 07 46.244858412           ~ 2 0
50 [FLC2013] 300S-2 * 10 07 40.1315307096 +16 03 09.760115952           ~ 4 0
51 SDSS J100740.14+155855.6 * 10 07 40.1466723840 +15 58 55.602305904           ~ 2 0
52 SDSS J100742.50+160006.7 * 10 07 42.502 +16 00 06.78           ~ 2 0
53 SDSS J100743.77+154932.8 * 10 07 43.775 +15 49 32.87           ~ 2 0
54 [FLC2013] 300S-44 * 10 07 47.1902842776 +16 05 45.561248844           ~ 2 0
55 Z 64-73 G 10 08 28.12 +12 18 23.4   11.3 10.0     ~ 1284 1
56 [FLC2013] 300S-11 * 10 08 39.6566482104 +16 28 26.750547696           ~ 3 0
57 [FLC2013] 300S-1 * 10 09 14.9459717712 +15 59 48.384449772           ~ 3 0
58 HD 122956 Pe* 14 05 13.0244442888 -14 51 25.455804480   8.18 7.3 6.88   G6IV/VwF6 169 0
59 Z 318-18 G 15 09 08.0 +67 13 21   13.60 10.6     ~ 1459 0
60 M 5 GlC 15 18 33.22 +02 04 51.7     5.95     ~ 2095 0
61 M 92 GlC 17 17 07.39 +43 08 09.4     6.52     ~ 2240 0
62 NAME Orphan Stream St* 19 09 -23.           ~ 281 0

To bookmark this query, right click on this link: simbad:objects in 2013ApJ...771...39F and select 'bookmark this link' or equivalent in the popup menu