Kohlenstoff-Neutronensternatmosphären

• Antragsteller: Professor Dr. Klaus Werner
• Fachliche Zuordnung: Astrophysik und Astronomie
• Förderung: Förderung von 2014 bis 2018
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 258855794

• Erstellungsjahr: 2018

Zusammenfassung der Projektergebnisse

We achieved about 50% of our initial aims concerning the development of carbon model atmospheres for neutron stars in central compact objects. We followed two new ideas which was not planned at the outset of the project because of new developments in the field. During the course of the project, we focused on a new idea, the development of the direct cooling tail method, to derive fundamental parameters of neutron stars that undergo thermonuclear bursts. Although that was not a direct aim of the initial project proposal, we are convinced that this new development represents a more fundamental step towards the overarching aim, namely to constrain NS masses and radii. Another new idea that we worked out is connected to the nature of ultraluminous X-ray sources. We concluded that a substantial part of these sources are accreting neutron stars in binary systems. The respective publication had a high impact, achieving 45 citations within about two years.

Projektbezogene Publikationen (Auswahl)

• 2017, “Analysing neutron star HESS J1731−347 from thermal emission and cooling theory”, MNRAS, 454, 2668
  Ofengeim, D.D., Kaminker, A.D., Klochkov, D., Suleimanov, V., Yakovlev, D.G.
  (Siehe online unter https://doi.org/10.1093/mnras/stv2204)
• 2017, “Basic parameters of the helium accreting X-ray bursting neutron star in 4U 1830−30”, MNRAS, 472, 3905
  Suleimanov, V.F., Kajava, J.J.E., Molkov, S.V., Nättilä, J., Lutovinov, A.A., Werner, K., Poutanen, J.
  (Siehe online unter https://doi.org/10.1093/mnras/stx2234)
• 2017, “Probing the possibility of hotspots on the central neutron star in HESS J1731−347”, A&A, 600, A43
  Suleimanov, V.F., Klochkov, D., Poutanen, J., Werner, K.
  (Siehe online unter https://doi.org/10.1051/0004-6361/201630028)
• 2017, “The direct cooling tail method for X-ray burst analysis to constrain neutron star masses and radii”, MNRAS, 466, 906
  Suleimanov, V.F., Poutanen, J., Nättilä, J., Kajava, J.J.E., Revnivtsev, M.G., Werner, K.
  (Siehe online unter https://doi.org/10.1093/mnras/stw3132)