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Limits on the abundance of galactic planets from 5 years of PLANET observations

journal contribution
posted on 2023-05-16, 12:55 authored by Albrow, MD, An, J, Jean-Philippe BeaulieuJean-Philippe Beaulieu, Caldwell, JAR, DePoy, DL, Dominik, M, Gaudi, BS, Gould, A, Greenhill, JG, Kym HillKym Hill, Kane, S, Martin, R, Menzies, J, Naber, RM, Pel, JW, Pogge, RW, Pollard, KR, Sackett, PD, Sahu, KC, Vermaak, P, Vreeswijk, PM, Watson, RD, Williams, A
We search for signatures of planets in 43 intensively monitored microlensing events that were observed between 1995 and 1999. Planets would be expected to cause a short-duration (∼1 day) deviation on the smooth, symmetric light curve produced by a single lens. We find no such anomalies and infer that less than one-third of the ∼0.3 M ⊙ stars that typically comprise the lens population have Jupiter mass companions with semimajor axes in the range of 1.5 AU < a < 4 AU. Since orbital periods of planets at these radii are 3-15 yr, the outer portion of this region is currently difficult to probe with any other technique.

History

Publication title

The Astrophysical Journal

Volume

556

Pagination

L113-L116

ISSN

0004-637X

Department/School

School of Natural Sciences

Publisher

The University of Chicago Press

Place of publication

Chicago

Repository Status

  • Restricted

Socio-economic Objectives

Expanding knowledge in the physical sciences

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