MASS MEASUREMENTS of ISOLATED OBJECTS from SPACE-BASED MICROLENSING

Wei Zhu; S. Calchi Novati; A. Gould; A. Udalski; C. Han; Y. Shvartzvald; C. Ranc; U. G. Jorgensen; R. Poleski; V. Bozza; C. Beichman; G. Bryden; S. Carey; B. S. Gaudi; C. B. Henderson; R. W. Pogge; I. Porritt; B. Wibking; J. C. Yee; M. Pawlak; M. K. Szymański; J. Skowron; P. Mróz; S. Kozłowski; Łukasz Wyrzykowski; P. Pietrukowicz; G. Pietrzyński; I. Soszyński; K. Ulaczyk; J. Y. Choi; H. Park; Y. K. Jung; I. G. Shin; M. D. Albrow; B. G. Park; S. L. Kim; C. U. Lee; S. M. Cha; D. J. Kim; Y. Lee; M. Friedmann; S. Kaspi; D. Maoz; M. Hundertmark; R. A. Street; Y. Tsapras; D. M. Bramich; A. Cassan; M. Dominik; E. Bachelet; Subo Dong; R. Figuera Jaimes; K. Horne; S. Mao; J. Menzies; R. Schmidt; C. Snodgrass; I. A. Steele; J. Wambsganss; J. Skottfelt; M. I. Andersen; M. J. Burgdorf; S. Ciceri; G. D'Ago; D. F. Evans; S. H. Gu; T. C. Hinse; E. Kerins; H. Korhonen; M. Kuffmeier; L. Mancini; N. Peixinho; A. Popovas; M. Rabus; S. Rahvar; R. Tronsgaard; G. Scarpetta; J. Southworth; J. Surdej; C. Von Essen; Y. B. Wang; O. Wertz

doi:https://doi.org/10.3847/0004-637X/825/1/60

MASS MEASUREMENTS of ISOLATED OBJECTS from SPACE-BASED MICROLENSING

Wei Zhu, S. Calchi Novati, A. Gould, A. Udalski, C. Han, Y. Shvartzvald, C. Ranc, U. G. Jorgensen, R. Poleski, V. Bozza, C. Beichman, G. Bryden, S. Carey, B. S. Gaudi, C. B. Henderson, R. W. Pogge, I. Porritt, B. Wibking, J. C. Yee, M. PawlakM. K. Szymański, J. Skowron, P. Mróz, S. Kozłowski, Łukasz Wyrzykowski, P. Pietrukowicz, G. Pietrzyński, I. Soszyński, K. Ulaczyk, J. Y. Choi, H. Park, Y. K. Jung, I. G. Shin, M. D. Albrow, B. G. Park, S. L. Kim, C. U. Lee, S. M. Cha, D. J. Kim, Y. Lee, M. Friedmann, S. Kaspi, D. Maoz, M. Hundertmark, R. A. Street, Y. Tsapras, D. M. Bramich, A. Cassan, M. Dominik, E. Bachelet, Subo Dong, R. Figuera Jaimes, K. Horne, S. Mao, J. Menzies, R. Schmidt, C. Snodgrass, I. A. Steele, J. Wambsganss, J. Skottfelt, M. I. Andersen, M. J. Burgdorf, S. Ciceri, G. D'Ago, D. F. Evans, S. H. Gu, T. C. Hinse, E. Kerins, H. Korhonen, M. Kuffmeier, L. Mancini, N. Peixinho, A. Popovas, M. Rabus, S. Rahvar, R. Tronsgaard, G. Scarpetta, J. Southworth, J. Surdej, C. Von Essen, Y. B. Wang, O. Wertz

School of Physics and Astronomy

Tel Aviv University

Research output: Contribution to journal › Article › peer-review

Abstract

We report on the mass and distance measurements of two single-lens events from the 2015 Spitzer microlensing campaign. With both finite-source effect and microlens parallax measurements, we find that the lens of OGLE-2015-BLG-1268 is very likely a brown dwarf (BD). Assuming that the source star lies behind the same amount of dust as the Bulge red clump, we find the lens is a 45 ±7 BD at 5.9 ±1.0 kpc. The lens of of the second event, OGLE-2015-BLG-0763, is a 0.50 ±0.04 star at 6.9 ±1.0 kpc. We show that the probability to definitively measure the mass of isolated microlenses is dramatically increased once simultaneous ground- and space-based observations are conducted.

Original language	English
Article number	60
Journal	Astrophysical Journal
Volume	825
Issue number	1
DOIs	https://doi.org/10.3847/0004-637X/825/1/60
State	Published - 1 Jul 2016

Keywords

brown dwarfs
gravitational lensing: micro
stars: fundamental parameters

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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https://doi.org/10.3847/0004-637X/825/1/60

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Zhu, W., Calchi Novati, S., Gould, A., Udalski, A., Han, C., Shvartzvald, Y., Ranc, C., Jorgensen, U. G., Poleski, R., Bozza, V., Beichman, C., Bryden, G., Carey, S., Gaudi, B. S., Henderson, C. B., Pogge, R. W., Porritt, I., Wibking, B., Yee, J. C., ... Wertz, O. (2016). MASS MEASUREMENTS of ISOLATED OBJECTS from SPACE-BASED MICROLENSING. Astrophysical Journal, 825(1), Article 60. https://doi.org/10.3847/0004-637X/825/1/60

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title = "MASS MEASUREMENTS of ISOLATED OBJECTS from SPACE-BASED MICROLENSING",

abstract = "We report on the mass and distance measurements of two single-lens events from the 2015 Spitzer microlensing campaign. With both finite-source effect and microlens parallax measurements, we find that the lens of OGLE-2015-BLG-1268 is very likely a brown dwarf (BD). Assuming that the source star lies behind the same amount of dust as the Bulge red clump, we find the lens is a 45 ±7 BD at 5.9 ±1.0 kpc. The lens of of the second event, OGLE-2015-BLG-0763, is a 0.50 ±0.04 star at 6.9 ±1.0 kpc. We show that the probability to definitively measure the mass of isolated microlenses is dramatically increased once simultaneous ground- and space-based observations are conducted.",

keywords = "brown dwarfs, gravitational lensing: micro, stars: fundamental parameters",

author = "Wei Zhu and {Calchi Novati}, S. and A. Gould and A. Udalski and C. Han and Y. Shvartzvald and C. Ranc and Jorgensen, {U. G.} and R. Poleski and V. Bozza and C. Beichman and G. Bryden and S. Carey and Gaudi, {B. S.} and Henderson, {C. B.} and Pogge, {R. W.} and I. Porritt and B. Wibking and Yee, {J. C.} and M. Pawlak and Szyma{\'n}ski, {M. K.} and J. Skowron and P. Mr{\'o}z and S. Koz{\l}owski and {\L}ukasz Wyrzykowski and P. Pietrukowicz and G. Pietrzy{\'n}ski and I. Soszy{\'n}ski and K. Ulaczyk and Choi, {J. Y.} and H. Park and Jung, {Y. K.} and Shin, {I. G.} and Albrow, {M. D.} and Park, {B. G.} and Kim, {S. L.} and Lee, {C. U.} and Cha, {S. M.} and Kim, {D. J.} and Y. Lee and M. Friedmann and S. Kaspi and D. Maoz and M. Hundertmark and Street, {R. A.} and Y. Tsapras and Bramich, {D. M.} and A. Cassan and M. Dominik and E. Bachelet and Subo Dong and Jaimes, {R. Figuera} and K. Horne and S. Mao and J. Menzies and R. Schmidt and C. Snodgrass and Steele, {I. A.} and J. Wambsganss and J. Skottfelt and Andersen, {M. I.} and Burgdorf, {M. J.} and S. Ciceri and G. D'Ago and Evans, {D. F.} and Gu, {S. H.} and Hinse, {T. C.} and E. Kerins and H. Korhonen and M. Kuffmeier and L. Mancini and N. Peixinho and A. Popovas and M. Rabus and S. Rahvar and R. Tronsgaard and G. Scarpetta and J. Southworth and J. Surdej and Essen, {C. Von} and Wang, {Y. B.} and O. Wertz",

year = "2016",

month = jul,

day = "1",

doi = "https://doi.org/10.3847/0004-637X/825/1/60",

language = "الإنجليزيّة",

volume = "825",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "1",

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Zhu, W, Calchi Novati, S, Gould, A, Udalski, A, Han, C, Shvartzvald, Y, Ranc, C, Jorgensen, UG, Poleski, R, Bozza, V, Beichman, C, Bryden, G, Carey, S, Gaudi, BS, Henderson, CB, Pogge, RW, Porritt, I, Wibking, B, Yee, JC, Pawlak, M, Szymański, MK, Skowron, J, Mróz, P, Kozłowski, S, Wyrzykowski, Ł, Pietrukowicz, P, Pietrzyński, G, Soszyński, I, Ulaczyk, K, Choi, JY, Park, H, Jung, YK, Shin, IG, Albrow, MD, Park, BG, Kim, SL, Lee, CU, Cha, SM, Kim, DJ, Lee, Y, Friedmann, M, Kaspi, S, Maoz, D, Hundertmark, M, Street, RA, Tsapras, Y, Bramich, DM, Cassan, A, Dominik, M, Bachelet, E, Dong, S, Jaimes, RF, Horne, K, Mao, S, Menzies, J, Schmidt, R, Snodgrass, C, Steele, IA, Wambsganss, J, Skottfelt, J, Andersen, MI, Burgdorf, MJ, Ciceri, S, D'Ago, G, Evans, DF, Gu, SH, Hinse, TC, Kerins, E, Korhonen, H, Kuffmeier, M, Mancini, L, Peixinho, N, Popovas, A, Rabus, M, Rahvar, S, Tronsgaard, R, Scarpetta, G, Southworth, J, Surdej, J, Essen, CV, Wang, YB & Wertz, O 2016, 'MASS MEASUREMENTS of ISOLATED OBJECTS from SPACE-BASED MICROLENSING', Astrophysical Journal, vol. 825, no. 1, 60. https://doi.org/10.3847/0004-637X/825/1/60

TY - JOUR

T1 - MASS MEASUREMENTS of ISOLATED OBJECTS from SPACE-BASED MICROLENSING

AU - Zhu, Wei

AU - Calchi Novati, S.

AU - Gould, A.

AU - Udalski, A.

AU - Han, C.

AU - Shvartzvald, Y.

AU - Ranc, C.

AU - Jorgensen, U. G.

AU - Poleski, R.

AU - Bozza, V.

AU - Beichman, C.

AU - Bryden, G.

AU - Carey, S.

AU - Gaudi, B. S.

AU - Henderson, C. B.

AU - Pogge, R. W.

AU - Porritt, I.

AU - Wibking, B.

AU - Yee, J. C.

AU - Pawlak, M.

AU - Szymański, M. K.

AU - Skowron, J.

AU - Mróz, P.

AU - Kozłowski, S.

AU - Wyrzykowski, Łukasz

AU - Pietrukowicz, P.

AU - Pietrzyński, G.

AU - Soszyński, I.

AU - Ulaczyk, K.

AU - Choi, J. Y.

AU - Park, H.

AU - Jung, Y. K.

AU - Shin, I. G.

AU - Albrow, M. D.

AU - Park, B. G.

AU - Kim, S. L.

AU - Lee, C. U.

AU - Cha, S. M.

AU - Kim, D. J.

AU - Lee, Y.

AU - Friedmann, M.

AU - Kaspi, S.

AU - Maoz, D.

AU - Hundertmark, M.

AU - Street, R. A.

AU - Tsapras, Y.

AU - Bramich, D. M.

AU - Cassan, A.

AU - Dominik, M.

AU - Bachelet, E.

AU - Dong, Subo

AU - Jaimes, R. Figuera

AU - Horne, K.

AU - Mao, S.

AU - Menzies, J.

AU - Schmidt, R.

AU - Snodgrass, C.

AU - Steele, I. A.

AU - Wambsganss, J.

AU - Skottfelt, J.

AU - Andersen, M. I.

AU - Burgdorf, M. J.

AU - Ciceri, S.

AU - D'Ago, G.

AU - Evans, D. F.

AU - Gu, S. H.

AU - Hinse, T. C.

AU - Kerins, E.

AU - Korhonen, H.

AU - Kuffmeier, M.

AU - Mancini, L.

AU - Peixinho, N.

AU - Popovas, A.

AU - Rabus, M.

AU - Rahvar, S.

AU - Tronsgaard, R.

AU - Scarpetta, G.

AU - Southworth, J.

AU - Surdej, J.

AU - Essen, C. Von

AU - Wang, Y. B.

AU - Wertz, O.

PY - 2016/7/1

Y1 - 2016/7/1

N2 - We report on the mass and distance measurements of two single-lens events from the 2015 Spitzer microlensing campaign. With both finite-source effect and microlens parallax measurements, we find that the lens of OGLE-2015-BLG-1268 is very likely a brown dwarf (BD). Assuming that the source star lies behind the same amount of dust as the Bulge red clump, we find the lens is a 45 ±7 BD at 5.9 ±1.0 kpc. The lens of of the second event, OGLE-2015-BLG-0763, is a 0.50 ±0.04 star at 6.9 ±1.0 kpc. We show that the probability to definitively measure the mass of isolated microlenses is dramatically increased once simultaneous ground- and space-based observations are conducted.

AB - We report on the mass and distance measurements of two single-lens events from the 2015 Spitzer microlensing campaign. With both finite-source effect and microlens parallax measurements, we find that the lens of OGLE-2015-BLG-1268 is very likely a brown dwarf (BD). Assuming that the source star lies behind the same amount of dust as the Bulge red clump, we find the lens is a 45 ±7 BD at 5.9 ±1.0 kpc. The lens of of the second event, OGLE-2015-BLG-0763, is a 0.50 ±0.04 star at 6.9 ±1.0 kpc. We show that the probability to definitively measure the mass of isolated microlenses is dramatically increased once simultaneous ground- and space-based observations are conducted.

KW - brown dwarfs

KW - gravitational lensing: micro

KW - stars: fundamental parameters

UR - http://www.scopus.com/inward/record.url?scp=84978227259&partnerID=8YFLogxK

U2 - https://doi.org/10.3847/0004-637X/825/1/60

DO - https://doi.org/10.3847/0004-637X/825/1/60

M3 - مقالة

SN - 0004-637X

VL - 825

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - 60

ER -

MASS MEASUREMENTS of ISOLATED OBJECTS from SPACE-BASED MICROLENSING

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Keywords

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