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Query : 2010MNRAS.407..189W |
2010MNRAS.407..189W - Mon. Not. R. Astron. Soc., 407, 189-200 (2010/September-1)
The OGLE view of microlensing towards the Magellanic Clouds - II. OGLE-II Small Magellanic Cloud data.
WYRZYKOWSKI L., KOZLOWSKI S., SKOWRON J., BELOKUROV V., SMITH M.C., UDALSKI A., SZYMANSKI M.K., KUBIAK M., PIETRZYNSKI G., SOSZYNSKI I. and SZEWCZYK O.
Abstract (from CDS):
Given a single event, taking blending (crowding of stars) into account for the detection-efficiency simulations and deriving the Hubble Space Telescope (HST)-corrected number of monitored stars, the microlensing optical depth is τ = (1.55±1.55)x10–7. This result is consistent with the expected SMC self-lensing signal, with no need to introduce dark matter microlenses. Rejecting the unconvincing event leads to an upper limit on the fraction of dark matter in the form of massive compact halo objects (MACHOs) of f < 20 per cent for deflector masses around 0.4M☉ and f < 11 per cent for masses between 0.003 and 0.2M☉(95 per cent confidence limit). Our result indicates that the Milky Way's dark matter is unlikely to be clumpy and to form compact objects in the subsolar-mass range.
Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS
Journal keyword(s): gravitational lensing: micro - Galaxy: halo - Galaxy: structure - galaxies: individual: Small Magellanic Cloud - dark matter
Nomenclature: Fig. 2, Paragr. 5.1: OGLE SMC-NN (No. 01).
Simbad objects: 7
Number of rows : 7 |
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 | MACHO 208.15683.4237 | * | 00 45 35.3 | -72 52 33 | ~ | 64 | 0 | |||||
2 | NAME SMC | G | 00 52 38.0 | -72 48 01 | 2.79 | 2.2 | ~ | 11141 | 1 | |||
3 | OGLE SMC-1 | RB? | 00 56 45.9479888184 | -72 37 19.971928092 | 15.37 | 16.23 | 15.91 | 15.27 | ~ | 3 | 0 | |
4 | MACHO 97-SMC-1 | * | 01 00 05.6 | -72 15 03 | 18.01 | 17.9 | 18.14 | ~ | 26 | 0 | ||
5 | NAME SMC Bar | PoG | 01 05 | -72.6 | ~ | 235 | 0 | |||||
6 | NAME Magellanic Clouds | GrG | 03 00 | -71.0 | ~ | 7058 | 0 | |||||
7 | NAME LMC | G | 05 23 34.6 | -69 45 22 | 0.4 | ~ | 17421 | 0 |
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