Metal-THINGS: On the metallicity and ionization of ULX sources in NGC 925

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dc.contributor.authorLara-López, Maritza A.
dc.contributor.authorZinchenko, Igor A.
dc.contributor.authorPilyugin, Leonid S.
dc.contributor.authorGunawardhana, Madusha L. P.
dc.contributor.authorLópez-Cruz, Omar
dc.contributor.authorO'Sullivan, Shane P.
dc.contributor.authorFeltre, Anna
dc.contributor.authorRosado, Margarita
dc.contributor.authorSánchez-Cruces, Mónica
dc.contributor.authorChevallard, Jacopo
dc.contributor.authorDe Rossi, Maria Emilia
dc.contributor.authorDib, Sami
dc.contributor.authorFritz, Jacopo
dc.contributor.authorFuentes-Carrera, Isaura
dc.contributor.authorGarduño, Luis E.
dc.contributor.authorIbar, Eduardo
dc.date.accessioned2022-11-30T02:46:28Z
dc.date.available2022-11-30T02:46:28Z
dc.date.issued2021
dc.description.abstractWe present an analysis of the optical properties of three Ultra Luminous X-ray (ULX) sources identified in NGC 925. We use Integral field unit data from the George Mitchel spectrograph in the context of the Metal-THINGS survey. The optical properties for ULX-1 and ULX-3 are presented, while the spaxel associated with ULX-2 had a low S/N, which prevented its analysis. We also report the kinematics and dimensions of the optical nebula associated with each ULX using ancillary data from the PUMA Fabry–Perot spectrograph. A BPT analysis demonstrates that most spaxels in NGC 925 are dominated by star-forming regions, including those associated with ULX-1 and ULX-3. Using the resolved gas-phase metallicities, a negative metallicity gradient is found, consistent with previous results for spiral galaxies, while the ionization parameter tends to increase radially throughout the galaxy. Interestingly, ULX-1 shows a very low gas metallicity for its galactocentric distance, identified by two independent methods, while exhibiting a typical ionization. We find that such low gas metallicity is best explained in the context of the high-mass X-ray binary population, where the low-metallicity environment favors active Roche lobe overflows that can drive much higher accretion rates. An alternative scenario invoking accretion of a low-mass galaxy is not supported by the data in this region. Finally, ULX-3 shows both a high metallicity and ionization parameter, which is consistent with the progenitor being a highly accreting neutron star within an evolved stellar population region.en_ES
dc.facultadFacultad de Cienciasen_ES
dc.file.nameLara_Met2021.pdf
dc.identifier.citationMaritza A. Lara-López et al 2021 ApJ 906 42en_ES
dc.identifier.doi10.3847/1538-4357/abc892
dc.identifier.urihttp://repositoriobibliotecas.uv.cl/handle/uvscl/7384
dc.languageen
dc.publisherAmerican Astronomical Society
dc.rights© 2021. The American Astronomical Society. All rights reserved
dc.sourceThe Astrophysical Journal
dc.subjectEMISSION LINE GALAXIESen_ES
dc.subjectIONIZATIONen_ES
dc.subjectCHEMICAL ABUNDANCESen_ES
dc.subjectABUNDANCE RATIOSen_ES
dc.subjectSPECTROSCOPYen_ES
dc.subjectX-RAY SOURCESen_ES
dc.titleMetal-THINGS: On the metallicity and ionization of ULX sources in NGC 925
dc.typeArticulo
uv.departamentoInstituto de Fisica y Astronomia

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