| Online-Ressource |
Verfasst von: | Lara-López, Maritza A. [VerfasserIn]  |
| Zinchenko, Igor A. [VerfasserIn]  |
| Pilyugin, Leonid S. [VerfasserIn]  |
| Gunawardhana, Madusha L. P. [VerfasserIn]  |
| López-Cruz, Omar [VerfasserIn]  |
| Sullivan, Shane P. O' [VerfasserIn]  |
| Feltre, Anna [VerfasserIn]  |
| Rosado, Margarita [VerfasserIn]  |
| Sánchez-Cruces, Mónica [VerfasserIn]  |
| Chevallard, Jacopo [VerfasserIn]  |
| Rossi, Maria Emilia De [VerfasserIn]  |
| Dib, Sami [VerfasserIn]  |
| Fritz, Jacopo [VerfasserIn]  |
| Fuentes-Carrera, Isaura [VerfasserIn]  |
| Garduño, Luis E. [VerfasserIn]  |
| Ibar, Eduardo [VerfasserIn]  |
Titel: | Metal-THINGS |
Titelzusatz: | on the metallicity and ionization of ULX sources in NGC 925 |
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 |
E-Jahr: | 2021 |
Jahr: | 2021 January 5 |
Umfang: | 11 S. |
Fussnoten: | Gesehen am 12.02.2021 |
Titel Quelle: | Enthalten in: The astrophysical journal / 1 |
Ort Quelle: | London : Institute of Physics Publ., 1996 |
Jahr Quelle: | 2021 |
Band/Heft Quelle: | 906(2021,1) Artikel-Nummer 42, 11 Seiten |
ISSN Quelle: | 1538-4357 |
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. |
DOI: | doi:10.3847/1538-4357/abc892 |
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 |
| DOI: https://doi.org/10.3847/1538-4357/abc892 |
Datenträger: | Online-Ressource |
Sprache: | eng |
K10plus-PPN: | 1748144677 |
Verknüpfungen: | → Zeitschrift |
Metal-THINGS / Lara-López, Maritza A. [VerfasserIn]; 2021 January 5 (Online-Ressource)