Spitzer Space Telescope Observations of the Aftermath of Microlensing Event MACHO-LMC-5

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dc.creatorNguyen, Hien Trong
dc.creatorKallivayalil, Nitya
dc.creatorWerner, Michael
dc.creatorAlcock, Charles
dc.creatorPatten, Brian
dc.creatorStern, Daniel
dc.date2004-06-01
dc.date.accessioned2026-07-07T02:13:23Z
dc.date.available2026-07-07T02:13:23Z
dc.descriptionWe have carried out photometry of the microlensing event MACHO-LMC-5 with Spitzer's IRAC ten years after the magnification of the LMC source star was recorded. This event is unique in the annals of gravitational microlensing: the lensing star itself has been observed using HST (once with WFPC2 and twice with ACS/HRC). Since the separation between the source and lens at the epoch of the Spitzer observations was $\sim0.24''$, the two stars cannot be resolved in the Spitzer images. However, the IRAC photometry clearly establishes that the lens is a M5 dwarf star from its infrared excess, which in turn yields a mass of $\sim0.2 M_{\odot}$. This demonstrates the potential of Spitzer to detect the lenses in other gravitational microlensing events.
dc.descriptionAccepted for publication, ApJS Spitzer Special Issue
dc.identifierhttps://arxiv.org/abs/astro-ph/0406040
dc.identifierhttp://arxiv.org/abs/astro-ph/0406040
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7796
dc.subjectAstrophysics
dc.titleSpitzer Space Telescope Observations of the Aftermath of Microlensing Event MACHO-LMC-5
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