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| Verfasst von: | Lara-López, Maritza A. [VerfasserIn]  |
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| | Zinchenko, Igor A. [VerfasserIn] |
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| | Pilyugin, Leonid S. [VerfasserIn] |
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| | Gunawardhana, Madusha L. P. [VerfasserIn] |
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| | López-Cruz, Omar [VerfasserIn] |
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| | Sullivan, Shane P. O' [VerfasserIn] |
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| | Feltre, Anna [VerfasserIn] |
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| | Rosado, Margarita [VerfasserIn] |
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| | Sánchez-Cruces, Mónica [VerfasserIn] |
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| | Chevallard, Jacopo [VerfasserIn] |
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| | Rossi, Maria Emilia De [VerfasserIn] |
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| | Dib, Sami [VerfasserIn] |
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| | Fritz, Jacopo [VerfasserIn] |
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| | Fuentes-Carrera, Isaura [VerfasserIn] |
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| | Garduño, Luis E. [VerfasserIn] |
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| | Ibar, Eduardo [VerfasserIn] |
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| Titel: | Metal-THINGS |
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| Titelzusatz: | on the metallicity and ionization of ULX sources in NGC 925 |
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| Verf.angabe: | Maritza A. Lara-López, Igor A. Zinchenko, Leonid S. Pilyugin, Madusha L.P. Gunawardhana, Omar López-Cruz, Shane P. O' Sullivan, Anna Feltre, Margarita Rosado, Mónica Sánchez-Cruces, Jacopo Chevallard, Maria Emilia De Rossi, Sami Dib, Jacopo Fritz, Isaura Fuentes-Carrera, Luis E. Garduño, and Eduardo Ibar |
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| E-Jahr: | 2021 |
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| Jahr: | 2021 January 5 |
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| Umfang: | 11 S. |
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| Fussnoten: | Gesehen am 12.02.2021 |
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| Titel Quelle: | Enthalten in: The astrophysical journal / 1 |
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| Ort Quelle: | London : Institute of Physics Publ., 1996 |
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| Jahr Quelle: | 2021 |
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| Band/Heft Quelle: | 906(2021,1) Artikel-Nummer 42, 11 Seiten |
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| ISSN Quelle: | 1538-4357 |
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| Abstract: | We 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. |
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| DOI: | doi:10.3847/1538-4357/abc892 |
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| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext: https://doi.org/10.3847/1538-4357/abc892 |
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| | DOI: https://doi.org/10.3847/1538-4357/abc892 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| K10plus-PPN: | 1748144677 |
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| Verknüpfungen: | → Zeitschrift |
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Metal-THINGS / Lara-López, Maritza A. [VerfasserIn]; 2021 January 5 (Online-Ressource)
