2010ApJ...711L..48C

Query : 2010ApJ...711L..48C

2010ApJ...711L..48C - Astrophys. J., 711, L48-L52 (2010/March-1)

A puzzle involving Galactic bulge microlensing events.

COHEN J.G., GOULD A., THOMPSON I.B., FELTZING S., BENSBY T., JOHNSON J.A., HUANG W., MELENDEZ J., LUCATELLO S. and ASPLUND M.

Abstract (from CDS):

We study a sample of 16 microlensed Galactic bulge main-sequence turnoff region stars for which high-dispersion spectra have been obtained with detailed abundance analyses. We demonstrate that there is a very strong and highly statistically significant correlation between the maximum magnification of the microlensed bulge star and the value of the [Fe/H] deduced from the high resolution spectrum of each object. Physics demands that this correlation, assuming it to be real, be the result of some sample bias. We suggest several possible explanations, but are forced to reject them all, and are left puzzled. To obtain a reliable metallicity distribution in the Galactic bulge based on microlensed dwarf stars, it will be necessary to resolve this issue through the course of additional observations.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: bulge - gravitational lensing: micro - stars: abundances

VizieR on-line data: <Available at CDS (J/ApJ/711/L48): table2.dat>

Simbad objects: 20

goto Full paper

goto View the references in ADS

Number of rows : 20
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 Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
2 MOA 2006-BUL-99 * 17 54 10.99 -35 13 38.0           G 16 0
3 MOA 2008-BLG-310 * 17 54 14.53 -34 46 41.0           GV 51 1
4 MOA 2009-BLG-493 * 17 55 46.13 -28 48 25.5           ~ 11 0
5 MOA 2008-BLG-311 * 17 56 53.65 -31 23 49.9           ~ 18 0
6 MACHO 98-BLG-6 * 17 57 32.8 -28 42 45     19.5     G5IV 21 0
7 MOA 2009-BLG-489 * 17 57 46.7236172064 -28 38 57.070782024           ~ 11 0
8 MOA 2009-BLG-259 * 17 57 57.51 -29 11 39.4           ~ 10 0
9 OGLE-2007-BUL-514 * 17 58 03.09 -27 31 05.7           ~ 16 0
10 OGLE-2009-BLG-076 * 17 58 31.93 -29 12 17.9           ~ 15 0
11 MOA 2009-BLG-475 * 18 02 27.46 -27 26 49.4           ~ 10 0
12 NAME Baade Window reg 18 03.5 -30 01           ~ 643 3
13 OGLE-2008-BUL-209 * 18 04 49.8347028546 -29 42 33.675924320           ~ 15 0
14 OGLE BUL-SC33 164492 * 18 05 05.28 -28 34 41.7           ~ 38 0
15 MOA 2007-BLG-379 ** 18 05 24.43 -26 25 18.8           ~ 58 1
16 MOA 2009-BLG-133 * 18 06 32.85 -31 30 11.4           ~ 11 0
17 OGLE-2006-BUL-265 * 18 07 18.88 -27 47 42.7           G 18 0
18 MACHO 99-BLG-1 * 18 08 50.0 -30 31 56           G2V 6 0
19 MOA 2008-BLG-456 * ~ ~           ~ 1 0
20 NAME Galactic Bulge reg ~ ~           ~ 4794 0

To bookmark this query, right click on this link: simbad:objects in 2010ApJ...711L..48C and select 'bookmark this link' or equivalent in the popup menu