2004A&A...427...61M


Query : 2004A&A...427...61M

2004A&A...427...61M - Astronomy and Astrophysics, volume 427, 61-77 (2004/11-3)

LMC self-lensing from a new perspective.

MANCINI L., CALCHI NOVATI S., JETZER P. and SCARPETTA G.

Abstract (from CDS):

We present a new analysis of the location of the observed microlensing events in the direction of the Large Magellanic Cloud (LMC). This is carried out starting from a recently drawn coherent picture of the geometrical structure and dynamics of the LMC disk and by considering different configurations for the LMC bar. In this framework it clearly emerges that the spatial distribution of the events observed so far shows a near-far asymmetry. This turns out to be compatible with the optical depth calculated for the LMC halo objects. Our main conclusion, supported by a statistical analysis of the outcome of an evaluation of the microlensing rate, is that self-lensing cannot account for all the observed events. Finally we propose a general inequality to calculate quickly an upper limit to the optical depth along a line of view through the LMC center.

Abstract Copyright:

Journal keyword(s): gravitational lensing - cosmology: dark matter - galaxies: Magellanic Clouds

Simbad objects: 18

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Number of rows : 18
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 MACHO LMC 20 Lev 04 54 19 -70 02.2     21.35     ~ 13 0
2 MACHO LMC 21 Lev 04 57 14 -69 27.8     19.37     ~ 8 0
3 MACHO LMC 25 Lev 05 02 16 -68 00.9     19.04     ~ 10 0
4 MACHO LMC 7 Lev 05 04 03.3 -69 33 18     20.7     ~ 13 0
5 MACHO LMC 15 Lev 05 05 46 -69 43.8     21.03     ~ 8 0
6 MACHO LMC 23 V* 05 06 17 -70 58.8     20.27     ~ 12 0
7 MACHO LMC 27 Lev 05 06 35 -69 20.8     19.24     ~ 8 0
8 MACHO LMC 22 Lev 05 14 32 -71 09.2     20.64     ~ 9 0
9 MACHO LMC 1 Lev 05 14 44.4 -68 48 00           ~ 35 0
10 MACHO LMC 5 Lev 05 16 41.1 -70 29 18     21.15     ~ 62 1
11 MACHO LMC 4 Lev 05 17 14.6 -70 46 59     20.25     ~ 20 0
12 MACHO LMC 9 Lev 05 20 20.3 -69 15 12     19.58     ~ 43 0
13 NAME LMC G 05 23 34.6 -69 45 22     0.4     ~ 16150 1
14 MACHO LMC 13 Lev 05 24 03.2 -68 49 12     21.02     ~ 8 0
15 MACHO LMC 8 Lev 05 25 09.4 -69 47 54     20.31     ~ 13 0
16 MACHO LMC 6 Lev 05 26 14.0 -70 21 15     19.97     ~ 13 0
17 MACHO 96-LMC-2 Lev 05 34 44.3 -70 25 07     19.37     ~ 21 0
18 MACHO LMC 18 Lev 05 45 21 -71 09.2     19.55     ~ 11 0

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2022.08.09-04:42:29

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