دورية أكاديمية
Single-lens mass measurement in the high-magnification microlensing event Gaia19bld located in the Galactic disc
| العنوان: | Single-lens mass measurement in the high-magnification microlensing event Gaia19bld located in the Galactic disc |
|---|---|
| المؤلفون: | Rybicki, KA, Wyrzykowski, L, Bachelet, E, Cassan, A, Zielinski, P, Gould, A, Calchi Novati, S, Yee, JC, Ryu, YH, Gromadzki, M, Mikolajczyk, P, Ihanec, N, Kruszynska, K, Hambsch, FJ, Zola, S, Fossey, SJ, Awiphan, S, Nakharutai, N, Lewis, F, Olivares, EF, Hodgkin, S, Delgado, A, Breedt, E, Harrison, DL, van Leeuwen, M, Rixon, G, Wevers, T, Yoldas, A, Udalski, A, Szymanski, MK, Soszynski, I, Pietrukowicz, P, Kozlowski, S, Skowron, J, Poleski, R, Ulaczyk, K, Mroz, P, Iwanek, P, Wrona, M, Street, RA, Tsapras, Y, Hundertmark, M, Dominik, M, Beichman, C, Bryden, G, Carey, S, Gaudi, BS, Henderson, C, Shvartzvald, Y, Zang, W, Zhu, W, Christie, GW, Green, J, Hennerley, S, McCormick, J, Monard, LAG, Natusch, T, Pogge, RW, Gezer, I, Gurgul, A, Kaczmarek, Z, Konacki, M, Lam, MC, Maskoliunas, M, Pakstiene, E, Ratajczak, M, Stankeviciute, A, Zdanavicius, J, Ziolkowska, O |
| المصدر: | Rybicki , KA , Wyrzykowski , L , Bachelet , E , Cassan , A , Zielinski , P , Gould , A , Calchi Novati , S , Yee , JC , Ryu , YH , Gromadzki , M , Mikolajczyk , P , Ihanec , N , Kruszynska , K , Hambsch , FJ , Zola , S , Fossey , SJ , Awiphan , S , Nakharutai , N , Lewis , F , Olivares , EF , Hodgkin , S , Delgado , A , Breedt , E , Harrison , DL , van Leeuwen .... |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Gravitational lensing: micro, Stars: fundamental parameters, White dwarfs, Stars: neutron |
| الوصف: | Context . Microlensing provides a unique opportunity to detect non-luminous objects. In the rare cases that the Einstein radius θ E and microlensing parallax π E can be measured, it is possible to determine the mass of the lens. With technological advances in both ground- and space-based observatories, astrometric and interferometric measurements are becoming viable, which can lead to the more routine determination of θ E and, if the microlensing parallax is also measured, the mass of the lens. Aims . We present the photometric analysis of Gaia19bld, a high-magnification (A approximate to 60) microlensing event located in the southern Galactic plane, which exhibited finite source and microlensing parallax effects. Due to a prompt detection by the Gaia satellite and the very high brightness of I = 9.05 mag at the peak, it was possible to collect a complete and unique set of multi-channel follow-up observations, which allowed us to determine all parameters vital for the characterisation of the lens and the source in the microlensing event. Methods . Gaia19bld was discovered by the Gaia satellite and was subsequently intensively followed up with a network of ground-based observatories and the Spitzer Space Telescope. We collected multiple high-resolution spectra with Very Large Telescope (VLT)/X-shooter to characterise the source star. The event was also observed with VLT Interferometer (VLTI)/PIONIER during the peak. Here we focus on the photometric observations and model the light curve composed of data from Gaia , Spitzer , and multiple optical, ground-based observatories. We find the best-fitting solution with parallax and finite source effects. We derived the limit on the luminosity of the lens based on the blended light model and spectroscopic distance. Results . We compute the mass of the lens to be 1.13 ± 0.03 M ⊙ and derive its distance to be 5.52 -0.64 +0.35 kpc. The lens is likely a main sequence star, however its true nature has yet to be verified by future high-resolution observations. Our results are ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| العلاقة: | https://research-portal.st-andrews.ac.uk/en/researchoutput/singlelens-mass-measurement-in-the-highmagnification-microlensing-event-gaia19bld-located-in-the-galactic-discTest(dc6af248-d80b-48e1-b0a5-15567d1f49be).html |
| DOI: | 10.1051/0004-6361/202039542 |
| الإتاحة: | https://doi.org/10.1051/0004-6361/202039542Test https://research-portal.st-andrews.ac.uk/en/researchoutput/singlelens-mass-measurement-in-the-highmagnification-microlensing-event-gaia19bld-located-in-the-galactic-discTest(dc6af248-d80b-48e1-b0a5-15567d1f49be).html https://research-repository.st-andrews.ac.uk/bitstream/10023/24640/1/Rybicki_2022_AA_Single_lens_mass_measurements_VoR.pdfTest |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.D92B46FA |
| قاعدة البيانات: | BASE |
| DOI: | 10.1051/0004-6361/202039542 |
|---|