2002ApJ...574L..43C

Query : 2002ApJ...574L..43C

2002ApJ...574L..43C - Astrophys. J., 574, L43-L46 (2002/July-3)

An upper limit to the age of the galactic bar.

COLE A.A. and WEINBERG M.D.

Abstract (from CDS):

Using data from the Two Micron All Sky Survey, we identify a population of infrared carbon stars with J-KS≥2 in the Milky Way. These stars are shown to trace the stellar bar previously identified in IR and optical surveys. The properties of C stars strongly suggest that they are of intermediate age. We conclude that the bar is likely to have formed more recently than 3 Gyr ago and must be younger than 6 Gyr. Implications and further tests of this conclusion are briefly discussed.

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Journal keyword(s): Galaxy: Disk - Galaxy: Structure - Stars: Carbon

Simbad objects: 21

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Number of rows : 21
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 ESO 28-19 Cl* 00 24 45.98 -72 47 37.9   11.6 12.05     ~ 148 0
2 M 32 GiG 00 42 41.82480 +40 51 54.6120 9.51 9.03 8.08     ~ 2154 2
3 NGC 361 OpC 01 02 11.11 -71 36 25.3 12.86 12.43 11.77   10.70 ~ 101 0
4 NGC 362 GlC 01 03 14.26 -70 50 55.6     6.58     ~ 1084 0
5 NGC 416 Cl* 01 07 59.03 -72 21 20.5 12.73 12.55 11.76   10.71 ~ 147 1
6 NGC 419 OpC 01 08 17.26 -72 53 01.8 11.41 11.16 10.50   9.34 ~ 272 0
7 Cl Lindsay 113 Cl* 01 49 30.0 -73 43 40   11.9       ~ 91 0
8 NGC 1783 GlC 04 59 08.590 -65 59 15.84   10.9 10.93     ~ 253 0
9 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 17428 0
10 NGC 1978 GlC 05 28 45.330 -66 14 12.04   10.7 10.70     ~ 308 0
11 NGC 2121 Cl* 05 48 13.190 -71 28 52.00   13.21 12.37     ~ 132 0
12 Cl Trumpler 5 OpC 06 36 30.2 +09 27 54           ~ 122 0
13 V* V493 Mon C* 06 36 32.6761497240 +09 25 39.300580236   15.80   11.31   C 22 1
14 Cl Melotte 66 OpC 07 26 17.5 -47 41 06   8.73       ~ 196 0
15 IRC +10216 C* 09 47 57.40632 +13 16 43.5648           C9,5e 2342 0
16 C 1235-509 GlC 12 38 40.20 -51 09 01.0           ~ 376 0
17 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1848 0
18 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 1975 0
19 NAME SDG G 18 55 19.0 -30 32 43   4.5 3.6     ~ 2186 2
20 NGC 7479 Sy2 23 04 56.6432243448 +12 19 22.357387020 11.74 11.60 10.85 10.47 9.66 ~ 742 2
21 NAME Galactic Bar reg ~ ~           ~ 1218 0

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