The Optical Gravitational Lensing Experiment. Variable Baseline Microlensing Events in the Galactic Bulge

Simple item page
dc.creatorWyrzykowski, L.
dc.creatorUdalski, A.
dc.creatorMao, S.
dc.creatorKubiak, M.
dc.creatorSzymanski, M. K.
dc.creatorPietrzynski, G.
dc.creatorSoszynski, I.
dc.creatorSzewczyk, O.
dc.date2006-07-07
dc.date.accessioned2026-07-07T07:15:36Z
dc.date.available2026-07-07T07:15:36Z
dc.descriptionWe present the first systematic search for microlensing events with variability in their baselines using data from the third phase of the Optical Gravitational Lensing Experiment (OGLE-III). A total of 137 candidates (88 new) was discovered toward the Galactic bulge. Among these, 21 have periodic oscillations in their baselines, 111 are irregular variables and 5 are potential long period detached eclipsing binaries. This is about 10% of the total number of constant baseline events. They are hence quite common and can be regarded as a new type of exotic events, which allow the determination of extra parameters of the events. We show that microlensing of variable stars may allow us to break the degeneracy between the blending parameter and magnification. We note that in some cases variability hidden in the baseline due to strong blending may be revealed in highly magnified events and resemble other exotic microlensing behavior, including planetary deviation. A new system (VEWS) for detecting ongoing variable baseline microlensing events is presented.
dc.descriptionThe paper with high quality figures is available from http://www.astrouw.edu.pl/~wyrzykow/varbaseevents.ps.gz
dc.identifierhttps://arxiv.org/abs/astro-ph/0607134
dc.identifierhttp://arxiv.org/abs/astro-ph/0607134
dc.identifierActa Astron. 56 (2006) 145
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/113276
dc.subjectAstrophysics
dc.titleThe Optical Gravitational Lensing Experiment. Variable Baseline Microlensing Events in the Galactic Bulge
dc.typetext

Files

Collections

arXiv