OGLE-2005-BLG-153: MICROLENSING DISCOVERY AND CHARACTERIZATION OF A VERY LOW MASS BINARY

K. -H. Hwang; A. Udalski; C. Han; Y. -H. Ryu; I. A. Bond; J. -P. Beaulieu; M. Dominik; K. Horne; A. Gould; B. S. Gaudi; M. Kubiak; M. K. Szymanski; G. Pietrzynski; I. Soszynski; O. Szewczyk; K. Ulaczyk; L. Wyrzykowski; F. Abe; C. S. Botzler; J. B. Hearnshaw; Y. Itow; K. Kamiya; P. M. Kilmartin; K. Masuda; Y. Matsubara; M. Motomura; Y. Muraki; S. Nakamura; K. Ohnishi; C. Okada; N. Rattenbury; To Saito; T. Sako; M. Sasaki; D. J. Sullivan; T. Sumi; P. J. Tristram; J. N. Wood; P. C. M. Yock; T. Yoshioka; M. Albrow; D. P. Bennett; D. M. Bramich; S. Brillant; J. A. R. Caldwell; J. J. Calitz; A. Cassan; K. H. Cook; E. Corrales; C. Coutures; M. Desort; S. Dieters; D. Dominis; J. Donatowicz; P. Fouque; J. Greenhill; K. Harpsoe; K. Hill; M. Hoffman; U. G. Jorgensen; S. Kane; D. Kubas; R. Martin; J. -B. Marquette; P. Meintjes; J. Menzies; K. Pollard; K. Sahu; I. Steele; C. Vinter; J. Wambsganss; A. Williams; K. Woller; M. Burgdorf; C. Snodgrass; M. Bode; D. L. Depoy; C. -U. Lee; B. -G. Park; R. W. Pogge

doi:10.1088/0004-637X/723/1/797

OGLE-2005-BLG-153: MICROLENSING DISCOVERY AND CHARACTERIZATION OF A VERY LOW MASS BINARY

K. -H. Hwang, A. Udalski, C. Han, Y. -H. Ryu, I. A. Bond, J. -P. Beaulieu, M. Dominik, K. Horne, A. Gould, B. S. Gaudi, M. Kubiak, M. K. Szymanski, G. Pietrzynski, I. Soszynski, O. Szewczyk, K. Ulaczyk, L. Wyrzykowski, F. Abe, C. S. Botzler, J. B. HearnshawY. Itow, K. Kamiya, P. M. Kilmartin, K. Masuda, Y. Matsubara, M. Motomura, Y. Muraki, S. Nakamura, K. Ohnishi, C. Okada, N. Rattenbury, To Saito, T. Sako, M. Sasaki, D. J. Sullivan, T. Sumi, P. J. Tristram, J. N. Wood, P. C. M. Yock, T. Yoshioka, M. Albrow, D. P. Bennett, D. M. Bramich, S. Brillant, J. A. R. Caldwell, J. J. Calitz, A. Cassan, K. H. Cook, E. Corrales, C. Coutures, M. Desort, S. Dieters, D. Dominis, J. Donatowicz, P. Fouque, J. Greenhill, K. Harpsoe, K. Hill, M. Hoffman, U. G. Jorgensen, S. Kane, D. Kubas, R. Martin, J. -B. Marquette, P. Meintjes, J. Menzies, K. Pollard, K. Sahu, I. Steele, C. Vinter, J. Wambsganss, A. Williams, K. Woller, M. Burgdorf, C. Snodgrass, M. Bode, D. L. Depoy, C. -U. Lee, B. -G. Park, R. W. Pogge

School of Physics and Astronomy

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

Abstract

The mass function and statistics of binaries provide important diagnostics of the star formation process. Despite this importance, the mass function at low masses remains poorly known due to observational difficulties caused by the faintness of the objects. Here we report the microlensing discovery and characterization of a binary lens composed of very low mass stars just above the hydrogen-burning limit. From the combined measurements of the Einstein radius and microlens parallax, we measure the masses of the binary components of 0.10 +/- 0.01 M-circle dot and 0.09 +/- 0.01 M-circle dot. This discovery demonstrates that microlensing will provide a method to measure the mass function of all Galactic populations of very low mass binaries that is independent of the biases caused by the luminosity of the population.

Original language	English
Pages (from-to)	797-802
Number of pages	6
Journal	Astrophysical Journal
Volume	723
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/723/1/797
Publication status	Published - 1 Nov 2010

Keywords

binaries: general
gravitational lensing: micro
GRAVITATIONAL LENSING EXPERIMENT
GALACTIC BULGE
EVENTS
SEARCH
STARS
DWARF

Access to Document

10.1088/0004-637X/723/1/797

Astrophysics in St Andrews: Astrophysics in St Andrews / SUPA (Continuan of Rolling Grant - XPP089
Bonnell, I. A. (PI), Cameron, A. C. (CoI), Dominik, M. (CoI), Driver, S. P. (CoI), Greaves, J. S. (CoI), Horne, K. D. (CoI), Jardine, M. M. (CoI), Wood, K. (CoI) & Zhao, H. (CoI)
Science & Technology Facilities Council
1/04/09 → 31/03/12
Project: Standard

Cite this

Hwang, K. .-H., Udalski, A., Han, C., Ryu, Y. .-H., Bond, I. A., Beaulieu, J. .-P., Dominik, M., Horne, K., Gould, A., Gaudi, B. S., Kubiak, M., Szymanski, M. K., Pietrzynski, G., Soszynski, I., Szewczyk, O., Ulaczyk, K., Wyrzykowski, L., Abe, F., Botzler, C. S., ... Pogge, R. W. (2010). OGLE-2005-BLG-153: MICROLENSING DISCOVERY AND CHARACTERIZATION OF A VERY LOW MASS BINARY. Astrophysical Journal, 723(1), 797-802. https://doi.org/10.1088/0004-637X/723/1/797

@article{f0eea44c857746d79841810ee0aabf91,

title = "OGLE-2005-BLG-153: MICROLENSING DISCOVERY AND CHARACTERIZATION OF A VERY LOW MASS BINARY",

abstract = "The mass function and statistics of binaries provide important diagnostics of the star formation process. Despite this importance, the mass function at low masses remains poorly known due to observational difficulties caused by the faintness of the objects. Here we report the microlensing discovery and characterization of a binary lens composed of very low mass stars just above the hydrogen-burning limit. From the combined measurements of the Einstein radius and microlens parallax, we measure the masses of the binary components of 0.10 +/- 0.01 M-circle dot and 0.09 +/- 0.01 M-circle dot. This discovery demonstrates that microlensing will provide a method to measure the mass function of all Galactic populations of very low mass binaries that is independent of the biases caused by the luminosity of the population.",

keywords = "binaries: general, gravitational lensing: micro, GRAVITATIONAL LENSING EXPERIMENT, GALACTIC BULGE, EVENTS, SEARCH, STARS, DWARF",

author = "Hwang, {K. -H.} and A. Udalski and C. Han and Ryu, {Y. -H.} and Bond, {I. A.} and Beaulieu, {J. -P.} and M. Dominik and K. Horne and A. Gould and Gaudi, {B. S.} and M. Kubiak and Szymanski, {M. K.} and G. Pietrzynski and I. Soszynski and O. Szewczyk and K. Ulaczyk and L. Wyrzykowski and F. Abe and Botzler, {C. S.} and Hearnshaw, {J. B.} and Y. Itow and K. Kamiya and Kilmartin, {P. M.} and K. Masuda and Y. Matsubara and M. Motomura and Y. Muraki and S. Nakamura and K. Ohnishi and C. Okada and N. Rattenbury and To Saito and T. Sako and M. Sasaki and Sullivan, {D. J.} and T. Sumi and Tristram, {P. J.} and Wood, {J. N.} and Yock, {P. C. M.} and T. Yoshioka and M. Albrow and Bennett, {D. P.} and Bramich, {D. M.} and S. Brillant and Caldwell, {J. A. R.} and Calitz, {J. J.} and A. Cassan and Cook, {K. H.} and E. Corrales and C. Coutures and M. Desort and S. Dieters and D. Dominis and J. Donatowicz and P. Fouque and J. Greenhill and K. Harpsoe and K. Hill and M. Hoffman and Jorgensen, {U. G.} and S. Kane and D. Kubas and R. Martin and Marquette, {J. -B.} and P. Meintjes and J. Menzies and K. Pollard and K. Sahu and I. Steele and C. Vinter and J. Wambsganss and A. Williams and K. Woller and M. Burgdorf and C. Snodgrass and M. Bode and Depoy, {D. L.} and Lee, {C. -U.} and Park, {B. -G.} and Pogge, {R. W.}",

year = "2010",

month = nov,

day = "1",

doi = "10.1088/0004-637X/723/1/797",

language = "English",

volume = "723",

pages = "797--802",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "1",

}

Hwang, K-H, Udalski, A, Han, C, Ryu, Y-H, Bond, IA, Beaulieu, J-P, Dominik, M , Horne, K, Gould, A, Gaudi, BS, Kubiak, M, Szymanski, MK, Pietrzynski, G, Soszynski, I, Szewczyk, O, Ulaczyk, K, Wyrzykowski, L, Abe, F, Botzler, CS, Hearnshaw, JB, Itow, Y, Kamiya, K, Kilmartin, PM, Masuda, K, Matsubara, Y, Motomura, M, Muraki, Y, Nakamura, S, Ohnishi, K, Okada, C, Rattenbury, N, Saito, T, Sako, T, Sasaki, M, Sullivan, DJ, Sumi, T, Tristram, PJ, Wood, JN, Yock, PCM, Yoshioka, T, Albrow, M, Bennett, DP, Bramich, DM, Brillant, S, Caldwell, JAR, Calitz, JJ, Cassan, A, Cook, KH, Corrales, E, Coutures, C, Desort, M, Dieters, S, Dominis, D, Donatowicz, J, Fouque, P, Greenhill, J, Harpsoe, K, Hill, K, Hoffman, M, Jorgensen, UG, Kane, S, Kubas, D, Martin, R, Marquette, J-B, Meintjes, P, Menzies, J, Pollard, K, Sahu, K, Steele, I, Vinter, C, Wambsganss, J, Williams, A, Woller, K, Burgdorf, M, Snodgrass, C, Bode, M, Depoy, DL, Lee, C-U, Park, B-G & Pogge, RW 2010, 'OGLE-2005-BLG-153: MICROLENSING DISCOVERY AND CHARACTERIZATION OF A VERY LOW MASS BINARY', Astrophysical Journal, vol. 723, no. 1, pp. 797-802. https://doi.org/10.1088/0004-637X/723/1/797

TY - JOUR

T1 - OGLE-2005-BLG-153: MICROLENSING DISCOVERY AND CHARACTERIZATION OF A VERY LOW MASS BINARY

AU - Hwang, K. -H.

AU - Udalski, A.

AU - Han, C.

AU - Ryu, Y. -H.

AU - Bond, I. A.

AU - Beaulieu, J. -P.

AU - Dominik, M.

AU - Horne, K.

AU - Gould, A.

AU - Gaudi, B. S.

AU - Kubiak, M.

AU - Szymanski, M. K.

AU - Pietrzynski, G.

AU - Soszynski, I.

AU - Szewczyk, O.

AU - Ulaczyk, K.

AU - Wyrzykowski, L.

AU - Abe, F.

AU - Botzler, C. S.

AU - Hearnshaw, J. B.

AU - Itow, Y.

AU - Kamiya, K.

AU - Kilmartin, P. M.

AU - Masuda, K.

AU - Matsubara, Y.

AU - Motomura, M.

AU - Muraki, Y.

AU - Nakamura, S.

AU - Ohnishi, K.

AU - Okada, C.

AU - Rattenbury, N.

AU - Saito, To

AU - Sako, T.

AU - Sasaki, M.

AU - Sullivan, D. J.

AU - Sumi, T.

AU - Tristram, P. J.

AU - Wood, J. N.

AU - Yock, P. C. M.

AU - Yoshioka, T.

AU - Albrow, M.

AU - Bennett, D. P.

AU - Bramich, D. M.

AU - Brillant, S.

AU - Caldwell, J. A. R.

AU - Calitz, J. J.

AU - Cassan, A.

AU - Cook, K. H.

AU - Corrales, E.

AU - Coutures, C.

AU - Desort, M.

AU - Dieters, S.

AU - Dominis, D.

AU - Donatowicz, J.

AU - Fouque, P.

AU - Greenhill, J.

AU - Harpsoe, K.

AU - Hill, K.

AU - Hoffman, M.

AU - Jorgensen, U. G.

AU - Kane, S.

AU - Kubas, D.

AU - Martin, R.

AU - Marquette, J. -B.

AU - Meintjes, P.

AU - Menzies, J.

AU - Pollard, K.

AU - Sahu, K.

AU - Steele, I.

AU - Vinter, C.

AU - Wambsganss, J.

AU - Williams, A.

AU - Woller, K.

AU - Burgdorf, M.

AU - Snodgrass, C.

AU - Bode, M.

AU - Depoy, D. L.

AU - Lee, C. -U.

AU - Park, B. -G.

AU - Pogge, R. W.

PY - 2010/11/1

Y1 - 2010/11/1

N2 - The mass function and statistics of binaries provide important diagnostics of the star formation process. Despite this importance, the mass function at low masses remains poorly known due to observational difficulties caused by the faintness of the objects. Here we report the microlensing discovery and characterization of a binary lens composed of very low mass stars just above the hydrogen-burning limit. From the combined measurements of the Einstein radius and microlens parallax, we measure the masses of the binary components of 0.10 +/- 0.01 M-circle dot and 0.09 +/- 0.01 M-circle dot. This discovery demonstrates that microlensing will provide a method to measure the mass function of all Galactic populations of very low mass binaries that is independent of the biases caused by the luminosity of the population.

AB - The mass function and statistics of binaries provide important diagnostics of the star formation process. Despite this importance, the mass function at low masses remains poorly known due to observational difficulties caused by the faintness of the objects. Here we report the microlensing discovery and characterization of a binary lens composed of very low mass stars just above the hydrogen-burning limit. From the combined measurements of the Einstein radius and microlens parallax, we measure the masses of the binary components of 0.10 +/- 0.01 M-circle dot and 0.09 +/- 0.01 M-circle dot. This discovery demonstrates that microlensing will provide a method to measure the mass function of all Galactic populations of very low mass binaries that is independent of the biases caused by the luminosity of the population.

KW - binaries: general

KW - gravitational lensing: micro

KW - GRAVITATIONAL LENSING EXPERIMENT

KW - GALACTIC BULGE

KW - EVENTS

KW - SEARCH

KW - STARS

KW - DWARF

U2 - 10.1088/0004-637X/723/1/797

DO - 10.1088/0004-637X/723/1/797

M3 - Article

SN - 0004-637X

VL - 723

SP - 797

EP - 802

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

OGLE-2005-BLG-153: MICROLENSING DISCOVERY AND CHARACTERIZATION OF A VERY LOW MASS BINARY

Abstract

Keywords

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Astrophysics in St Andrews: Astrophysics in St Andrews / SUPA (Continuan of Rolling Grant - XPP089

Cite this