SIMBAD references

2011MNRAS.416.2949W - Mon. Not. R. Astron. Soc., 416, 2949-2961 (2011/October-1)

The OGLE view of microlensing towards the Magellanic clouds – IV. OGLE-III SMC data and final conclusions on MACHOs.

WYRZYKOWSKI L., SKOWRON J., KOZLOWSKI S., UDALSKI A., SZYMANSKI M.K., KUBIAK M., PIETRZYNSKI G., SOSZYNSKI I., SZEWCZYK O., ULACZYK K., POLESKI R. and TISSERAND P.

Abstract (from CDS):

In this fourth part of the series presenting the Optical Gravitational Lensing Experiment (OGLE) microlensing studies of the dark matter halo compact objects (MACHOs), we describe results of the OGLE-III monitoring of the Small Magellanic Cloud (SMC). Three sound candidates for microlensing events were found and yielded the optical depth τSMC–OIII= 1.30±1.01 {x} 10–7, consistent with the expected contribution from Galactic disc and SMC self-lensing. We report that event OGLE-SMC-03 is most likely a thick-disc lens candidate, the first of such type found towards the SMC. In this paper we also combined all OGLE Large Magellanic Cloud and SMC microlensing results in order to refine the conclusions on MACHOs. All but one of the OGLE events are most likely caused by the lensing by known populations of stars; therefore, we concluded that there is no need for introducing any special dark matter compact objects in order to explain the observed event rates. Potential black hole event indicates that similar lenses can contribute only about 2 per cent to the total mass of the halo, which is still in agreement with the expected number of such objects.

Based on observations obtained with the 1.3-m Warsaw telescope at the Las Campanas Observatory of the Carnegie Institution of Washington.


Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): Galaxy: halo - Galaxy: structure - dark matter

Nomenclature: Fig. 4, Table 4: OGLE SMC-NN (Nos 02-04) added.

Simbad objects: 11

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2011MNRAS.416.2949W and select 'bookmark this link' or equivalent in the popup menu


2019.10.17-03:44:17

© Université de Strasbourg/CNRS

    • Contact