An almanac of predicted microlensing events for the 21st century

D. M. Bramich, Martin Bo Nielsen

    Research output: Contribution to journalArticle

    Abstract

    Using Gaia data release 2 (GDR2), we present an almanac of 2509 predicted microlensing events, caused by 2130 unique lens stars, that will peak between July 25, 2026 and the end of the century. This work extends and completes a thorough search for future microlensing events initiated by Bramich and Nielsen using GDR2. The almanac includes 161 lenses that will cause at least two microlensing events each. A few highlights are presented and discussed, including: (i) an astrometric microlensing event with a peak amplitude of ≈ 9.7 mas, (ii) an event that will probe the planetary system of a lens with three known planets, and (iii) an event (resolvable from space) where the blend of the lens and the minor source image will brighten by a detectable amount (≈ 2 mmag) due to the appearance of the minor source image. All of the predicted microlensing events in the almanac will exhibit astrometric signals that are detectable by observing facilities with an angular resolution and astrometric precision similar to, or better than, that of the Hubble Space Telescope (e.g.,NIRCam on the James Webb Space Telescope), although the events with the most extreme source-to-lens contrast ratios may be challenging. Ground-based telescopes of at least 1 m in diameter can be used to observe many of the events that are also expected to exhibit a photometric signal.

    Original languageEnglish (US)
    Pages (from-to)183-203
    Number of pages21
    JournalActa Astronomica
    Volume68
    Issue number3
    DOIs
    StatePublished - Jan 1 2018

    Fingerprint

    twenty first century
    lenses
    planet
    probe
    James Webb Space Telescope
    planetary systems
    angular resolution
    Hubble Space Telescope
    planets
    telescopes
    stars
    probes
    causes

    Keywords

    • Astrometry
    • Catalogs
    • Data analysis
    • Fundamental parameters
    • Gravitational lensing
    • Methods
    • Micro
    • Stars

    ASJC Scopus subject areas

    • Astronomy and Astrophysics
    • Space and Planetary Science

    Cite this

    An almanac of predicted microlensing events for the 21st century. / Bramich, D. M.; Nielsen, Martin Bo.

    In: Acta Astronomica, Vol. 68, No. 3, 01.01.2018, p. 183-203.

    Research output: Contribution to journalArticle

    Bramich, D. M. ; Nielsen, Martin Bo. / An almanac of predicted microlensing events for the 21st century. In: Acta Astronomica. 2018 ; Vol. 68, No. 3. pp. 183-203.
    @article{4f028df7feee460fa07723e3808989a9,
    title = "An almanac of predicted microlensing events for the 21st century",
    abstract = "Using Gaia data release 2 (GDR2), we present an almanac of 2509 predicted microlensing events, caused by 2130 unique lens stars, that will peak between July 25, 2026 and the end of the century. This work extends and completes a thorough search for future microlensing events initiated by Bramich and Nielsen using GDR2. The almanac includes 161 lenses that will cause at least two microlensing events each. A few highlights are presented and discussed, including: (i) an astrometric microlensing event with a peak amplitude of ≈ 9.7 mas, (ii) an event that will probe the planetary system of a lens with three known planets, and (iii) an event (resolvable from space) where the blend of the lens and the minor source image will brighten by a detectable amount (≈ 2 mmag) due to the appearance of the minor source image. All of the predicted microlensing events in the almanac will exhibit astrometric signals that are detectable by observing facilities with an angular resolution and astrometric precision similar to, or better than, that of the Hubble Space Telescope (e.g.,NIRCam on the James Webb Space Telescope), although the events with the most extreme source-to-lens contrast ratios may be challenging. Ground-based telescopes of at least 1 m in diameter can be used to observe many of the events that are also expected to exhibit a photometric signal.",
    keywords = "Astrometry, Catalogs, Data analysis, Fundamental parameters, Gravitational lensing, Methods, Micro, Stars",
    author = "Bramich, {D. M.} and Nielsen, {Martin Bo}",
    year = "2018",
    month = "1",
    day = "1",
    doi = "10.32023/0001-5237/68.3.1",
    language = "English (US)",
    volume = "68",
    pages = "183--203",
    journal = "Acta Astronomica",
    issn = "0001-5237",
    publisher = "Copernicus Foundation for Polish Astronomy",
    number = "3",

    }

    TY - JOUR

    T1 - An almanac of predicted microlensing events for the 21st century

    AU - Bramich, D. M.

    AU - Nielsen, Martin Bo

    PY - 2018/1/1

    Y1 - 2018/1/1

    N2 - Using Gaia data release 2 (GDR2), we present an almanac of 2509 predicted microlensing events, caused by 2130 unique lens stars, that will peak between July 25, 2026 and the end of the century. This work extends and completes a thorough search for future microlensing events initiated by Bramich and Nielsen using GDR2. The almanac includes 161 lenses that will cause at least two microlensing events each. A few highlights are presented and discussed, including: (i) an astrometric microlensing event with a peak amplitude of ≈ 9.7 mas, (ii) an event that will probe the planetary system of a lens with three known planets, and (iii) an event (resolvable from space) where the blend of the lens and the minor source image will brighten by a detectable amount (≈ 2 mmag) due to the appearance of the minor source image. All of the predicted microlensing events in the almanac will exhibit astrometric signals that are detectable by observing facilities with an angular resolution and astrometric precision similar to, or better than, that of the Hubble Space Telescope (e.g.,NIRCam on the James Webb Space Telescope), although the events with the most extreme source-to-lens contrast ratios may be challenging. Ground-based telescopes of at least 1 m in diameter can be used to observe many of the events that are also expected to exhibit a photometric signal.

    AB - Using Gaia data release 2 (GDR2), we present an almanac of 2509 predicted microlensing events, caused by 2130 unique lens stars, that will peak between July 25, 2026 and the end of the century. This work extends and completes a thorough search for future microlensing events initiated by Bramich and Nielsen using GDR2. The almanac includes 161 lenses that will cause at least two microlensing events each. A few highlights are presented and discussed, including: (i) an astrometric microlensing event with a peak amplitude of ≈ 9.7 mas, (ii) an event that will probe the planetary system of a lens with three known planets, and (iii) an event (resolvable from space) where the blend of the lens and the minor source image will brighten by a detectable amount (≈ 2 mmag) due to the appearance of the minor source image. All of the predicted microlensing events in the almanac will exhibit astrometric signals that are detectable by observing facilities with an angular resolution and astrometric precision similar to, or better than, that of the Hubble Space Telescope (e.g.,NIRCam on the James Webb Space Telescope), although the events with the most extreme source-to-lens contrast ratios may be challenging. Ground-based telescopes of at least 1 m in diameter can be used to observe many of the events that are also expected to exhibit a photometric signal.

    KW - Astrometry

    KW - Catalogs

    KW - Data analysis

    KW - Fundamental parameters

    KW - Gravitational lensing

    KW - Methods

    KW - Micro

    KW - Stars

    UR - http://www.scopus.com/inward/record.url?scp=85054795993&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=85054795993&partnerID=8YFLogxK

    U2 - 10.32023/0001-5237/68.3.1

    DO - 10.32023/0001-5237/68.3.1

    M3 - Article

    VL - 68

    SP - 183

    EP - 203

    JO - Acta Astronomica

    JF - Acta Astronomica

    SN - 0001-5237

    IS - 3

    ER -