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EN
ČeštinaEnglish

NGC 4993, the shell galaxy host of GW170817: constraints on the recent galactic merger

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F20%3A10421311" target="_blank" >RIV/00216208:11320/20:10421311 - isvavai.cz</a>

  • Result on the web

    <a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=5qjBud1ELR" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=5qjBud1ELR</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1051/0004-6361/201935219" target="_blank" >10.1051/0004-6361/201935219</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    NGC 4993, the shell galaxy host of GW170817: constraints on the recent galactic merger

  • Original language description

    Context. NGC 4993 is the shell galaxy host of the GRB170817A short gamma-ray burst and the GW170817 gravitational-wave event produced during a binary-neutron-star coalescence.Aims. The galaxy shows signs, including the stellar shells, that it has recently accreted a smaller, late-type galaxy. The accreted galaxy might be the original host of the binary neutron star.Methods. We measured the positions of the stellar shells of NGC 4993 in an HST/ACS archival image and use the shell positions to constrain the time of the galactic merger.Results. According to the analytical model of the evolution of the shell structure in the expected gravitational potential of NGC 4993, the galactic merger happened at least 200 Myr ago, with a probable time roughly around 400 Myr, and the estimates higher than 600 Myr being improbable. This constitutes the lower limit on the age of the binary neutron star, because the host galaxy was probably quenched even before the galactic merger, and the merger has likely shut down the star formation in the accreted galaxy. We roughly estimate the probability that the binary neutron star originates in the accreted galaxy to be around 30%.

  • Czech name

    —

  • Czech description

    —

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

    —

  • OECD FORD branch

    10308 - Astronomy (including astrophysics,space science)

Result continuities

  • Project

    —

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2020

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Astronomy &amp; Astrophysics

  • ISSN

    0004-6361

  • e-ISSN

    —

  • Volume of the periodical

    634

  • Issue of the periodical within the volume

    February

  • Country of publishing house

    FR - FRANCE

  • Number of pages

    11

  • Pages from-to

    A73

  • UT code for WoS article

    000514884700002

  • EID of the result in the Scopus database

    2-s2.0-85091816142

Similar results(10)

NGC 4993, the shell galaxy host of GW170817: constraints on the recent galactic mergerMOND prediction of a new giant shell in the elliptical galaxy NGC 3923Origin of the spectacular tidal shells of galaxy NGC 474 & x22c6;