| Online-Ressource |
Verfasst von: | Ksoll, Victor F. [VerfasserIn]  |
| Gouliermis, Dimitrios A. [VerfasserIn]  |
| Sabbi, Elena [VerfasserIn]  |
| Ryon, Jenna E. [VerfasserIn]  |
| Robberto, Massimo [VerfasserIn]  |
| Gennaro, Mario [VerfasserIn]  |
| Klessen, Ralf S. [VerfasserIn]  |
| Köthe, Ullrich [VerfasserIn]  |
| De Marchi, Guido [VerfasserIn]  |
| Chen, C.-H. Rosie [VerfasserIn]  |
| Cignoni, Michele [VerfasserIn]  |
| Dolphin, Andrew E. [VerfasserIn]  |
Titel: | Measuring young stars in space and time |
Titelzusatz: | II. the pre-main-sequence stellar content of N44 |
Verf.angabe: | Victor F. Ksoll, Dimitrios Gouliermis, Elena Sabbi, Jenna E. Ryon, Massimo Robberto, Mario Gennaro, Ralf S. Klessen, Ullrich Koethe, Guido de Marchi, C.-H. Rosie Chen, Michele Cignoni, and Andrew E. Dolphin |
E-Jahr: | 2021 |
Jahr: | 2021 May 7 |
Umfang: | 25 S. |
Fussnoten: | Gesehen am 15.06.2021 |
Titel Quelle: | Enthalten in: The astronomical journal |
Ort Quelle: | London : Institute of Physics Publ., 1998 |
Jahr Quelle: | 2021 |
Band/Heft Quelle: | 161(2021), 6, Artikel-ID 257, Seite 1-25 |
ISSN Quelle: | 1538-3881 |
Abstract: | The Hubble Space Telescope survey Measuring Young Stars in Space and Time (MYSST) entails some of the deepest photometric observations of extragalactic star formation, capturing even the lowest-mass stars of the active star-forming complex N44 in the Large Magellanic Cloud. We employ the new MYSST stellar catalog to identify and characterize the content of young pre-main-sequence (PMS) stars across N44 and analyze the PMS clustering structure. To distinguish PMS stars from more evolved line of sight contaminants, a non-trivial task due to several effects that alter photometry, we utilize a machine-learning classification approach. This consists of training a support vector machine (SVM) and a random forest (RF) on a carefully selected subset of the MYSST data and categorize all observed stars as PMS or non-PMS. Combining SVM and RF predictions to retrieve the most robust set of PMS sources, we find ∼26,700 candidates with a PMS probability above 95% across N44. Employing a clustering approach based on a nearest neighbor surface density estimate, we identify 16 prominent PMS structures at 1σ significance above the mean density with sub-clusters persisting up to and beyond 3σ significance. The most active star-forming center, located at the western edge of N44's bubble, is a subcluster with an effective radius of ∼5.6 pc entailing more than 1100 PMS candidates. Furthermore, we confirm that almost all identified clusters coincide with known H ii regions and are close to or harbor massive young O stars or YSOs previously discovered by MUSE and Spitzer observations. |
DOI: | doi:10.3847/1538-3881/abee8c |
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/10.3847/1538-3881/abee8c |
| DOI: https://doi.org/10.3847/1538-3881/abee8c |
Datenträger: | Online-Ressource |
Sprache: | eng |
K10plus-PPN: | 1760469157 |
Verknüpfungen: | → Zeitschrift |
Measuring young stars in space and time / Ksoll, Victor F. [VerfasserIn]; 2021 May 7 (Online-Ressource)