Precision measurement of a brown dwarf mass in a binary system in the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Standard

Precision measurement of a brown dwarf mass in a binary system in the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035. / Herald, A.; Udalski, A.; Bozza, V.; Rota, P.; Bond, I. A.; Yee, J. C.; Sajadian, S.; Mroz, P.; Poleski, R.; Skowron, J.; Szymanski, M. K.; Soszynski, I.; Pietrukowicz, P.; Kozlowski, S.; Ulaczyk, K.; Rybicki, K. A.; Iwanek, P.; Wrona, M.; Gromadzki, M.; Abe, F.; Barry, R.; Bennett, D. P.; Bhattacharya, A.; Fukui, A.; Fujii, H.; Hirao, Y.; Itow, Y.; Kirikawa, R.; Kondo, I.; Koshimoto, N.; Matsubara, Y.; Matsumoto, S.; Miyazaki, S.; Muraki, Y.; Olmschenk, G.; Ranc, C.; Okamura, A.; Rattenbury, N. J.; Satoh, Y.; Sumi, T.; Suzuki, D.; Silva, S. Ishitani; Toda, T.; Tristram, P. J.; Vandorou, A.; Yama, H.; Beichman, C. A.; Bryden, G.; Jorgensen, U. G.; Bach-Moller, N.; OGLE Collaboration; MOA Collaboration; Spitzer Team; MINDSTEp Consortium; LCO & FUN Collaboration.

I: Astronomy & Astrophysics, Bind 663, 100, 19.07.2022.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Herald, A, Udalski, A, Bozza, V, Rota, P, Bond, IA, Yee, JC, Sajadian, S, Mroz, P, Poleski, R, Skowron, J, Szymanski, MK, Soszynski, I, Pietrukowicz, P, Kozlowski, S, Ulaczyk, K, Rybicki, KA, Iwanek, P, Wrona, M, Gromadzki, M, Abe, F, Barry, R, Bennett, DP, Bhattacharya, A, Fukui, A, Fujii, H, Hirao, Y, Itow, Y, Kirikawa, R, Kondo, I, Koshimoto, N, Matsubara, Y, Matsumoto, S, Miyazaki, S, Muraki, Y, Olmschenk, G, Ranc, C, Okamura, A, Rattenbury, NJ, Satoh, Y, Sumi, T, Suzuki, D, Silva, SI, Toda, T, Tristram, PJ, Vandorou, A, Yama, H, Beichman, CA, Bryden, G, Jorgensen, UG, Bach-Moller, N, OGLE Collaboration, MOA Collaboration, Spitzer Team, MINDSTEp Consortium & LCO & FUN Collaboration 2022, 'Precision measurement of a brown dwarf mass in a binary system in the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035', Astronomy & Astrophysics, bind 663, 100. https://doi.org/10.1051/0004-6361/202243490

APA

Herald, A., Udalski, A., Bozza, V., Rota, P., Bond, I. A., Yee, J. C., Sajadian, S., Mroz, P., Poleski, R., Skowron, J., Szymanski, M. K., Soszynski, I., Pietrukowicz, P., Kozlowski, S., Ulaczyk, K., Rybicki, K. A., Iwanek, P., Wrona, M., Gromadzki, M., ... LCO & FUN Collaboration (2022). Precision measurement of a brown dwarf mass in a binary system in the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035. Astronomy & Astrophysics, 663, [100]. https://doi.org/10.1051/0004-6361/202243490

Vancouver

Herald A, Udalski A, Bozza V, Rota P, Bond IA, Yee JC o.a. Precision measurement of a brown dwarf mass in a binary system in the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035. Astronomy & Astrophysics. 2022 jul. 19;663. 100. https://doi.org/10.1051/0004-6361/202243490

Author

Herald, A. ; Udalski, A. ; Bozza, V. ; Rota, P. ; Bond, I. A. ; Yee, J. C. ; Sajadian, S. ; Mroz, P. ; Poleski, R. ; Skowron, J. ; Szymanski, M. K. ; Soszynski, I. ; Pietrukowicz, P. ; Kozlowski, S. ; Ulaczyk, K. ; Rybicki, K. A. ; Iwanek, P. ; Wrona, M. ; Gromadzki, M. ; Abe, F. ; Barry, R. ; Bennett, D. P. ; Bhattacharya, A. ; Fukui, A. ; Fujii, H. ; Hirao, Y. ; Itow, Y. ; Kirikawa, R. ; Kondo, I. ; Koshimoto, N. ; Matsubara, Y. ; Matsumoto, S. ; Miyazaki, S. ; Muraki, Y. ; Olmschenk, G. ; Ranc, C. ; Okamura, A. ; Rattenbury, N. J. ; Satoh, Y. ; Sumi, T. ; Suzuki, D. ; Silva, S. Ishitani ; Toda, T. ; Tristram, P. J. ; Vandorou, A. ; Yama, H. ; Beichman, C. A. ; Bryden, G. ; Jorgensen, U. G. ; Bach-Moller, N. ; OGLE Collaboration ; MOA Collaboration ; Spitzer Team ; MINDSTEp Consortium ; LCO & FUN Collaboration. / Precision measurement of a brown dwarf mass in a binary system in the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035. I: Astronomy & Astrophysics. 2022 ; Bind 663.

Bibtex

@article{d94aaa75f23045748ae67172f0575a5f,
title = "Precision measurement of a brown dwarf mass in a binary system in the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035",
abstract = "Context. Brown dwarfs are transition objects between stars and planets that are still poorly understood, for which several competing mechanisms have been proposed to describe their formation. Mass measurements are generally difficult to carry out for isolated objects as well as for brown dwarfs orbiting low-mass stars, which are often too faint for a spectroscopic follow-up.Aims. Microlensing provides an alternative tool for the discovery and investigation of such faint systems. Here, we present an analysis of the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035, which is caused by a binary system composed of a brown dwarf orbiting a red dwarf.Methods. Thanks to extensive ground observations and the availability of space observations from Spitzer, it has been possible to obtain accurate estimates of all microlensing parameters, including the parallax, source radius, and orbital motion of the binary lens.Results. Following an accurate modeling process, we found that the lens is composed of a red dwarf with a mass of M-1 = 0.149 +/- 0.010 M-circle dot and a brown dwarf with a mass of M-2 = 0.0463 +/- 0.0031 M-circle dot at a projected separation of a(perpendicular to) = 0.585 au. The system has a peculiar velocity that is typical of old metal-poor populations in the thick disk. A percent-level precision in the mass measurement of brown dwarfs has been achieved only in a few microlensing events up to now, but will likely become more common in the future thanks to the Roman space telescope.",
keywords = "gravitational lensing: micro, binaries: general, brown dwarfs, stars: low-mass, DIFFERENCE IMAGE-ANALYSIS, GALACTIC BULGE, GRAVITATIONAL LENS, CHEMICAL EVOLUTION, PLANET CANDIDATE, OPTICAL DEPTH, GIANT PLANETS, PHOTOMETRY, DISCOVERY, SPITZER",
author = "A. Herald and A. Udalski and V. Bozza and P. Rota and Bond, {I. A.} and Yee, {J. C.} and S. Sajadian and P. Mroz and R. Poleski and J. Skowron and Szymanski, {M. K.} and I. Soszynski and P. Pietrukowicz and S. Kozlowski and K. Ulaczyk and Rybicki, {K. A.} and P. Iwanek and M. Wrona and M. Gromadzki and F. Abe and R. Barry and Bennett, {D. P.} and A. Bhattacharya and A. Fukui and H. Fujii and Y. Hirao and Y. Itow and R. Kirikawa and I. Kondo and N. Koshimoto and Y. Matsubara and S. Matsumoto and S. Miyazaki and Y. Muraki and G. Olmschenk and C. Ranc and A. Okamura and Rattenbury, {N. J.} and Y. Satoh and T. Sumi and D. Suzuki and Silva, {S. Ishitani} and T. Toda and Tristram, {P. J.} and A. Vandorou and H. Yama and Beichman, {C. A.} and G. Bryden and Jorgensen, {U. G.} and N. Bach-Moller and {OGLE Collaboration} and {MOA Collaboration} and {Spitzer Team} and {MINDSTEp Consortium} and {LCO & FUN Collaboration}",
year = "2022",
month = jul,
day = "19",
doi = "10.1051/0004-6361/202243490",
language = "English",
volume = "663",
journal = "Astronomy & Astrophysics",
issn = "0004-6361",
publisher = "E D P Sciences",

}

RIS

TY - JOUR

T1 - Precision measurement of a brown dwarf mass in a binary system in the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035

AU - Herald, A.

AU - Udalski, A.

AU - Bozza, V.

AU - Rota, P.

AU - Bond, I. A.

AU - Yee, J. C.

AU - Sajadian, S.

AU - Mroz, P.

AU - Poleski, R.

AU - Skowron, J.

AU - Szymanski, M. K.

AU - Soszynski, I.

AU - Pietrukowicz, P.

AU - Kozlowski, S.

AU - Ulaczyk, K.

AU - Rybicki, K. A.

AU - Iwanek, P.

AU - Wrona, M.

AU - Gromadzki, M.

AU - Abe, F.

AU - Barry, R.

AU - Bennett, D. P.

AU - Bhattacharya, A.

AU - Fukui, A.

AU - Fujii, H.

AU - Hirao, Y.

AU - Itow, Y.

AU - Kirikawa, R.

AU - Kondo, I.

AU - Koshimoto, N.

AU - Matsubara, Y.

AU - Matsumoto, S.

AU - Miyazaki, S.

AU - Muraki, Y.

AU - Olmschenk, G.

AU - Ranc, C.

AU - Okamura, A.

AU - Rattenbury, N. J.

AU - Satoh, Y.

AU - Sumi, T.

AU - Suzuki, D.

AU - Silva, S. Ishitani

AU - Toda, T.

AU - Tristram, P. J.

AU - Vandorou, A.

AU - Yama, H.

AU - Beichman, C. A.

AU - Bryden, G.

AU - Jorgensen, U. G.

AU - Bach-Moller, N.

AU - OGLE Collaboration

AU - MOA Collaboration

AU - Spitzer Team

AU - MINDSTEp Consortium

AU - LCO & FUN Collaboration

PY - 2022/7/19

Y1 - 2022/7/19

N2 - Context. Brown dwarfs are transition objects between stars and planets that are still poorly understood, for which several competing mechanisms have been proposed to describe their formation. Mass measurements are generally difficult to carry out for isolated objects as well as for brown dwarfs orbiting low-mass stars, which are often too faint for a spectroscopic follow-up.Aims. Microlensing provides an alternative tool for the discovery and investigation of such faint systems. Here, we present an analysis of the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035, which is caused by a binary system composed of a brown dwarf orbiting a red dwarf.Methods. Thanks to extensive ground observations and the availability of space observations from Spitzer, it has been possible to obtain accurate estimates of all microlensing parameters, including the parallax, source radius, and orbital motion of the binary lens.Results. Following an accurate modeling process, we found that the lens is composed of a red dwarf with a mass of M-1 = 0.149 +/- 0.010 M-circle dot and a brown dwarf with a mass of M-2 = 0.0463 +/- 0.0031 M-circle dot at a projected separation of a(perpendicular to) = 0.585 au. The system has a peculiar velocity that is typical of old metal-poor populations in the thick disk. A percent-level precision in the mass measurement of brown dwarfs has been achieved only in a few microlensing events up to now, but will likely become more common in the future thanks to the Roman space telescope.

AB - Context. Brown dwarfs are transition objects between stars and planets that are still poorly understood, for which several competing mechanisms have been proposed to describe their formation. Mass measurements are generally difficult to carry out for isolated objects as well as for brown dwarfs orbiting low-mass stars, which are often too faint for a spectroscopic follow-up.Aims. Microlensing provides an alternative tool for the discovery and investigation of such faint systems. Here, we present an analysis of the microlensing event OGLE-2019-BLG-0033/MOA-2019-BLG-035, which is caused by a binary system composed of a brown dwarf orbiting a red dwarf.Methods. Thanks to extensive ground observations and the availability of space observations from Spitzer, it has been possible to obtain accurate estimates of all microlensing parameters, including the parallax, source radius, and orbital motion of the binary lens.Results. Following an accurate modeling process, we found that the lens is composed of a red dwarf with a mass of M-1 = 0.149 +/- 0.010 M-circle dot and a brown dwarf with a mass of M-2 = 0.0463 +/- 0.0031 M-circle dot at a projected separation of a(perpendicular to) = 0.585 au. The system has a peculiar velocity that is typical of old metal-poor populations in the thick disk. A percent-level precision in the mass measurement of brown dwarfs has been achieved only in a few microlensing events up to now, but will likely become more common in the future thanks to the Roman space telescope.

KW - gravitational lensing: micro

KW - binaries: general

KW - brown dwarfs

KW - stars: low-mass

KW - DIFFERENCE IMAGE-ANALYSIS

KW - GALACTIC BULGE

KW - GRAVITATIONAL LENS

KW - CHEMICAL EVOLUTION

KW - PLANET CANDIDATE

KW - OPTICAL DEPTH

KW - GIANT PLANETS

KW - PHOTOMETRY

KW - DISCOVERY

KW - SPITZER

U2 - 10.1051/0004-6361/202243490

DO - 10.1051/0004-6361/202243490

M3 - Journal article

VL - 663

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

SN - 0004-6361

M1 - 100

ER -

ID: 315254593