Extending the planetary mass function to earth mass by microlensing at moderately high magnification

Fumio Abe; Charlotte Airey; Lydia Philpott; Nicholas Rattenbury; Philip Yock; Ellen Barnard; Julie Baudry; Christine Botzler; Dimitri Douchin; Matthew Freeman; Patricia Larsen; Anna Niemiec; Yvette Perrott

doi:10.1093/mnras/stt318

Extending the planetary mass function to earth mass by microlensing at moderately high magnification

Fumio Abe, Charlotte Airey, Lydia Philpott, Nicholas Rattenbury, Philip Yock, Ellen Barnard, Julie Baudry, Christine Botzler, Dimitri Douchin, Matthew Freeman, Patricia Larsen, Anna Niemiec, Yvette Perrott

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15 Citations (Scopus)

Abstract

A measurement by microlensing of the planetary mass function of planets with masses ranging from 5 M⊕ to 10 MJ and orbital radii from 0.5 to 10 au was reported recently. A strategy for extending the mass range down to (1-3) M⊕ is proposed here. This entails monitoring the peaks of a few tens of microlensing events with moderately high magnifications with 1-2 m class telescopes. Planets of a few Earth masses are found to produce deviations of ~5 per cent to the peaks of microlensing light curves with durations ~(0.7-3) hr in events with magnification ~100 if the projected separation of the planet lies in the annular region (0.85-1.2)rE. Similar deviations are produced by Earth mass planets in the annular region (0.95-1.05)rE. It is possible that sub-Earths could be detected very close to the Einstein ring if they are sufficiently abundant, and also planetary systems with more than one low-mass planet.

Original language	English
Pages (from-to)	2975-2985
Number of pages	11
Journal	Monthly Notices of the Royal Astronomical Society
Volume	431
Issue number	4
DOIs	https://doi.org/10.1093/mnras/stt318
Publication status	Published - 2013

Keywords

Gravitational lensing: micro; Planetary systems

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10.1093/mnras/stt318

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Abe, F., Airey, C., Philpott, L., Rattenbury, N., Yock, P., Barnard, E., Baudry, J., Botzler, C., Douchin, D., Freeman, M., Larsen, P., Niemiec, A., & Perrott, Y. (2013). Extending the planetary mass function to earth mass by microlensing at moderately high magnification. Monthly Notices of the Royal Astronomical Society, 431(4), 2975-2985. https://doi.org/10.1093/mnras/stt318

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title = "Extending the planetary mass function to earth mass by microlensing at moderately high magnification",

abstract = "A measurement by microlensing of the planetary mass function of planets with masses ranging from 5 M⊕ to 10 MJ and orbital radii from 0.5 to 10 au was reported recently. A strategy for extending the mass range down to (1-3) M⊕ is proposed here. This entails monitoring the peaks of a few tens of microlensing events with moderately high magnifications with 1-2 m class telescopes. Planets of a few Earth masses are found to produce deviations of ~5 per cent to the peaks of microlensing light curves with durations ~(0.7-3) hr in events with magnification ~100 if the projected separation of the planet lies in the annular region (0.85-1.2)rE. Similar deviations are produced by Earth mass planets in the annular region (0.95-1.05)rE. It is possible that sub-Earths could be detected very close to the Einstein ring if they are sufficiently abundant, and also planetary systems with more than one low-mass planet.",

keywords = "Gravitational lensing: micro; Planetary systems",

author = "Fumio Abe and Charlotte Airey and Lydia Philpott and Nicholas Rattenbury and Philip Yock and Ellen Barnard and Julie Baudry and Christine Botzler and Dimitri Douchin and Matthew Freeman and Patricia Larsen and Anna Niemiec and Yvette Perrott",

year = "2013",

doi = "10.1093/mnras/stt318",

language = "English",

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Abe, F, Airey, C, Philpott, L, Rattenbury, N, Yock, P, Barnard, E, Baudry, J, Botzler, C, Douchin, D, Freeman, M, Larsen, P, Niemiec, A & Perrott, Y 2013, 'Extending the planetary mass function to earth mass by microlensing at moderately high magnification', Monthly Notices of the Royal Astronomical Society, vol. 431, no. 4, pp. 2975-2985. https://doi.org/10.1093/mnras/stt318

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T1 - Extending the planetary mass function to earth mass by microlensing at moderately high magnification

AU - Abe, Fumio

AU - Airey, Charlotte

AU - Philpott, Lydia

AU - Rattenbury, Nicholas

AU - Yock, Philip

AU - Barnard, Ellen

AU - Baudry, Julie

AU - Botzler, Christine

AU - Douchin, Dimitri

AU - Freeman, Matthew

AU - Larsen, Patricia

AU - Niemiec, Anna

AU - Perrott, Yvette

PY - 2013

Y1 - 2013

N2 - A measurement by microlensing of the planetary mass function of planets with masses ranging from 5 M⊕ to 10 MJ and orbital radii from 0.5 to 10 au was reported recently. A strategy for extending the mass range down to (1-3) M⊕ is proposed here. This entails monitoring the peaks of a few tens of microlensing events with moderately high magnifications with 1-2 m class telescopes. Planets of a few Earth masses are found to produce deviations of ~5 per cent to the peaks of microlensing light curves with durations ~(0.7-3) hr in events with magnification ~100 if the projected separation of the planet lies in the annular region (0.85-1.2)rE. Similar deviations are produced by Earth mass planets in the annular region (0.95-1.05)rE. It is possible that sub-Earths could be detected very close to the Einstein ring if they are sufficiently abundant, and also planetary systems with more than one low-mass planet.

AB - A measurement by microlensing of the planetary mass function of planets with masses ranging from 5 M⊕ to 10 MJ and orbital radii from 0.5 to 10 au was reported recently. A strategy for extending the mass range down to (1-3) M⊕ is proposed here. This entails monitoring the peaks of a few tens of microlensing events with moderately high magnifications with 1-2 m class telescopes. Planets of a few Earth masses are found to produce deviations of ~5 per cent to the peaks of microlensing light curves with durations ~(0.7-3) hr in events with magnification ~100 if the projected separation of the planet lies in the annular region (0.85-1.2)rE. Similar deviations are produced by Earth mass planets in the annular region (0.95-1.05)rE. It is possible that sub-Earths could be detected very close to the Einstein ring if they are sufficiently abundant, and also planetary systems with more than one low-mass planet.

KW - Gravitational lensing: micro; Planetary systems

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DO - 10.1093/mnras/stt318

M3 - Article

SN - 0035-8711

VL - 431

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JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 4

ER -

Extending the planetary mass function to earth mass by microlensing at moderately high magnification

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