The Open UniversitySkip to content
 

Realisation of a fully-deterministic microlensing observing strategy for inferring planet populations

Dominik, M.; Jørgensen, U. G.; Rattenbury, N. J.; Mathiasen, M.; Hinse, T. C.; Calchi Novati, S.; Harpsøe, K.; Bozza, V.; Anguita, T.; Burgdorf, M. J.; Horne, K.; Hundertmark, M.; Kerins, E.; Kjaergaard, P.; Liebig, C.; Mancini, L.; Masi, G.; Rahvar, S.; Ricci, D.; Scarpetta, G.; Snodgrass, C.; Southworth, J.; Street, R. A.; Surdej, J.; Thöne, C. C.; Tsapras, Y.; Wambsganss, J. and Zub, M. (2010). Realisation of a fully-deterministic microlensing observing strategy for inferring planet populations. Astronomische Nachrichten, 331(7) pp. 671–691.

DOI (Digital Object Identifier) Link: https://doi.org/10.1002/asna.201011400
Google Scholar: Look up in Google Scholar

Abstract

Within less than 15 years, the count of known planets orbiting stars other than the Sun has risen from none to more than 400 with detections arising from four successfully applied techniques: Doppler-wobbles, planetary transits, gravitational microlensing, and direct imaging. While the hunt for twin Earths is on, a statistically well-defined sample of the population of planets in all their variety is required for probing models of planet formation and orbital evolution so that the origin of planets that harbour life, like and including ours, can be understood. Given the different characteristics of the detection techniques, a complete picture can only arise from a combination of their respective results. Microlensing observations are well-suited to reveal statistical properties of the population of planets orbiting stars in either the Galactic disk or bulge from microlensing observations, but a mandatory requirement is the adoption of strictly-deterministic criteria for selecting targets and identifying signals. Here, we describe a fully-deterministic strategy realised by means of the ARTEMiS (Automated Robotic Terrestrial Exoplanet Microlensing Search) system at the Danish 1.54-m telescope at ESO La Silla between June and August 2008 as part of the MiNDSTEp (Microlensing Network for the Detection of Small Terrestrial Exoplanets) campaign, making use of immediate feedback on suspected anomalies recognized by the SIGNALMEN anomaly detector. We demonstrate for the first time the feasibility of such an approach, and thereby the readiness for studying planet populations down to Earth mass and even below, with ground-based observations. While the quality of the real-time photometry is a crucial factor on the efficiency of the campaign, an impairment of the target selection by data of bad quality can be successfully avoided. With a smaller slew time, smaller dead time, and higher through-put, modern robotic telescopes could significantly outperform the 1.54-m Danish, whereas lucky-imaging cameras could set new standards for high-precision follow-up monitoring of microlensing events

Item Type: Journal Item
Copyright Holders: 010 WILEY-VCH Verlag GmbH & Co. KGaA
ISSN: 1521-3994
Keywords: gravitational lensing; planetary systems
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Research Group: Space
Item ID: 43090
Depositing User: Colin Snodgrass
Date Deposited: 15 Jun 2015 09:38
Last Modified: 07 Dec 2018 10:31
URI: http://oro.open.ac.uk/id/eprint/43090
Share this page:

Metrics

Altmetrics from Altmetric

Citations from Dimensions

Actions (login may be required)

Policies | Disclaimer

© The Open University   contact the OU