Abstract
The mass of the lenses giving rise to Galactic microlensing events can be constrained by measuring the relative lens-source proper motion and lens flux. The flux of the lens can be separated from that of the source, companions to the source, and unrelated nearby stars with high-resolution images taken when the lens and source are spatially resolved. For typical ground-based adaptive optics (AO) or space-based observations, this requires either inordinately long time baselines or high relative proper motions. We provide a list of microlensing events toward the Galactic bulge with high relative lens-source proper motion that are therefore good candidates for constraining the lens mass with future high-resolution imaging. We investigate all events from 2004 to 2013 that display detectable finite-source effects, a feature that allows us to measure the proper motion. In total, we present 20 events with μ ≳ 8 mas yr-1. Of these, 14 were culled from previous analyses while 6 are new, including OGLE-2004-BLG-368, MOA-2005-BLG-36, OGLE-2012-BLG-0211, OGLE-2012-BLG-0456, MOA-2012-BLG-532, and MOA-2013-BLG-029. In ≲12 yr from the time of each event the lens and source of each event will be sufficiently separated for ground-based telescopes with AO systems or space telescopes to resolve each component and further characterize the lens system. Furthermore, for the most recent events, comparison of the lens flux estimates from images taken immediately to those estimated from images taken when the lens and source are resolved can be used to empirically check the robustness of the single-epoch method currently being used to estimate lens masses for many events.
Original language | English |
---|---|
Article number | 71 |
Journal | Astrophysical Journal |
Volume | 794 |
Issue number | 1 |
DOIs | |
Publication status | Published - 10 Oct 2014 |
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Keywords
- binaries: generalgravitational lensing: micro
ASJC Scopus subject areas
- Space and Planetary Science
- Astronomy and Astrophysics
Cite this
Candidate gravitational microlensing events for future direct lens imaging. / Henderson, C. B.; Park, H.; Sumi, T.; Udalski, A.; Gould, A.; Tsapras, Y.; Han, C.; Gaudi, B. S.; Bozza, V.; Abe, F.; Bennett, D. P.; Bond, I. A.; Botzler, C. S.; Freeman, M.; Fukui, A.; Fukunaga, D.; Itow, Y.; Koshimoto, N.; Ling, C. H.; Masuda, K.; Matsubara, Y.; Muraki, Y.; Namba, S.; Ohnishi, K.; Rattenbury, N. J.; Saito, To; Sullivan, D. J.; Suzuki, D.; Sweatman, W. L.; Tristram, P. J.; Tsurumi, N.; Wada, K.; Yamai, N.; Yock, P. C M; Yonehara, A.; Szymański, M. K.; Kubiak, M.; Pietrzyński, G.; Soszyński, I.; Skowron, J.; Kozłowski, S.; Poleski, R.; Ulaczyk, K.; Wyrzykowski, [No Value]; Pietrukowicz, P.; Almeida, L. A.; Bos, M.; Choi, J. Y.; Christie, G. W.; Depoy, D. L.; Dong, S.; Friedmann, M.; Hwang, K. H.; Jablonski, F.; Jung, Y. K.; Kaspi, S.; Lee, C. U.; Maoz, D.; McCormick, J.; Moorhouse, D.; Natusch, T.; Ngan, H.; Pogge, R. W.; Shin, I. G.; Shvartzvald, Y.; Tan, T. G.; Thornley, G.; Yee, J. C.; Allan, A.; Bramich, D. M.; Browne, P.; Dominik, M.; Horne, K.; Hundertmark, M.; Jaimes, R. Figuera; Kains, N.; Snodgrass, C.; Steele, I. A.; Street, R. A.
In: Astrophysical Journal, Vol. 794, No. 1, 71, 10.10.2014.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Candidate gravitational microlensing events for future direct lens imaging
AU - Henderson, C. B.
AU - Park, H.
AU - Sumi, T.
AU - Udalski, A.
AU - Gould, A.
AU - Tsapras, Y.
AU - Han, C.
AU - Gaudi, B. S.
AU - Bozza, V.
AU - Abe, F.
AU - Bennett, D. P.
AU - Bond, I. A.
AU - Botzler, C. S.
AU - Freeman, M.
AU - Fukui, A.
AU - Fukunaga, D.
AU - Itow, Y.
AU - Koshimoto, N.
AU - Ling, C. H.
AU - Masuda, K.
AU - Matsubara, Y.
AU - Muraki, Y.
AU - Namba, S.
AU - Ohnishi, K.
AU - Rattenbury, N. J.
AU - Saito, To
AU - Sullivan, D. J.
AU - Suzuki, D.
AU - Sweatman, W. L.
AU - Tristram, P. J.
AU - Tsurumi, N.
AU - Wada, K.
AU - Yamai, N.
AU - Yock, P. C M
AU - Yonehara, A.
AU - Szymański, M. K.
AU - Kubiak, M.
AU - Pietrzyński, G.
AU - Soszyński, I.
AU - Skowron, J.
AU - Kozłowski, S.
AU - Poleski, R.
AU - Ulaczyk, K.
AU - Wyrzykowski, [No Value]
AU - Pietrukowicz, P.
AU - Almeida, L. A.
AU - Bos, M.
AU - Choi, J. Y.
AU - Christie, G. W.
AU - Depoy, D. L.
AU - Dong, S.
AU - Friedmann, M.
AU - Hwang, K. H.
AU - Jablonski, F.
AU - Jung, Y. K.
AU - Kaspi, S.
AU - Lee, C. U.
AU - Maoz, D.
AU - McCormick, J.
AU - Moorhouse, D.
AU - Natusch, T.
AU - Ngan, H.
AU - Pogge, R. W.
AU - Shin, I. G.
AU - Shvartzvald, Y.
AU - Tan, T. G.
AU - Thornley, G.
AU - Yee, J. C.
AU - Allan, A.
AU - Bramich, D. M.
AU - Browne, P.
AU - Dominik, M.
AU - Horne, K.
AU - Hundertmark, M.
AU - Jaimes, R. Figuera
AU - Kains, N.
AU - Snodgrass, C.
AU - Steele, I. A.
AU - Street, R. A.
PY - 2014/10/10
Y1 - 2014/10/10
N2 - The mass of the lenses giving rise to Galactic microlensing events can be constrained by measuring the relative lens-source proper motion and lens flux. The flux of the lens can be separated from that of the source, companions to the source, and unrelated nearby stars with high-resolution images taken when the lens and source are spatially resolved. For typical ground-based adaptive optics (AO) or space-based observations, this requires either inordinately long time baselines or high relative proper motions. We provide a list of microlensing events toward the Galactic bulge with high relative lens-source proper motion that are therefore good candidates for constraining the lens mass with future high-resolution imaging. We investigate all events from 2004 to 2013 that display detectable finite-source effects, a feature that allows us to measure the proper motion. In total, we present 20 events with μ ≳ 8 mas yr-1. Of these, 14 were culled from previous analyses while 6 are new, including OGLE-2004-BLG-368, MOA-2005-BLG-36, OGLE-2012-BLG-0211, OGLE-2012-BLG-0456, MOA-2012-BLG-532, and MOA-2013-BLG-029. In ≲12 yr from the time of each event the lens and source of each event will be sufficiently separated for ground-based telescopes with AO systems or space telescopes to resolve each component and further characterize the lens system. Furthermore, for the most recent events, comparison of the lens flux estimates from images taken immediately to those estimated from images taken when the lens and source are resolved can be used to empirically check the robustness of the single-epoch method currently being used to estimate lens masses for many events.
AB - The mass of the lenses giving rise to Galactic microlensing events can be constrained by measuring the relative lens-source proper motion and lens flux. The flux of the lens can be separated from that of the source, companions to the source, and unrelated nearby stars with high-resolution images taken when the lens and source are spatially resolved. For typical ground-based adaptive optics (AO) or space-based observations, this requires either inordinately long time baselines or high relative proper motions. We provide a list of microlensing events toward the Galactic bulge with high relative lens-source proper motion that are therefore good candidates for constraining the lens mass with future high-resolution imaging. We investigate all events from 2004 to 2013 that display detectable finite-source effects, a feature that allows us to measure the proper motion. In total, we present 20 events with μ ≳ 8 mas yr-1. Of these, 14 were culled from previous analyses while 6 are new, including OGLE-2004-BLG-368, MOA-2005-BLG-36, OGLE-2012-BLG-0211, OGLE-2012-BLG-0456, MOA-2012-BLG-532, and MOA-2013-BLG-029. In ≲12 yr from the time of each event the lens and source of each event will be sufficiently separated for ground-based telescopes with AO systems or space telescopes to resolve each component and further characterize the lens system. Furthermore, for the most recent events, comparison of the lens flux estimates from images taken immediately to those estimated from images taken when the lens and source are resolved can be used to empirically check the robustness of the single-epoch method currently being used to estimate lens masses for many events.
KW - binaries: generalgravitational lensing: micro
UR - http://www.scopus.com/inward/record.url?scp=84907311501&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84907311501&partnerID=8YFLogxK
U2 - 10.1088/0004-637X/794/1/71
DO - 10.1088/0004-637X/794/1/71
M3 - Article
AN - SCOPUS:84907311501
VL - 794
JO - Astrophysical Journal
JF - Astrophysical Journal
SN - 0004-637X
IS - 1
M1 - 71
ER -