Napredna pretraga

Pregled bibliografske jedinice broj: 371212

A systematic fitting scheme for caustic-crossing microlensing events


Kains, N.; Cassan, A.; Horne, K.; Albrow, M. D.; Dieters, S.; Fouque, P.; Greenhill, J.; Udalski, A.; Zub, M.; Bennett, D.P. et al.
A systematic fitting scheme for caustic-crossing microlensing events // Monthly notices of the Royal Astronomical Society, 395 (2009), 2; 787-796 (međunarodna recenzija, članak, znanstveni)


Naslov
A systematic fitting scheme for caustic-crossing microlensing events

Autori
Kains, N. ; Cassan, A. ; Horne, K. ; Albrow, M. D. ; Dieters, S. ; Fouque, P. ; Greenhill, J. ; Udalski, A. ; Zub, M. ; Bennett, D.P. ; Dominik, M. ; Donatowicz, J. ; Kubas, D. ; Tsapras, Y. ; Anguita, T. ; Batista, V. ; Beaulieu, J.-P. ; Brillant, S. ; Bode, M. ; Bramich, D.M. ; Burgdorf, M. ; Caldwell, J. A. R. ; Cook, K. H. ; Coutures, Ch. ; Dominis Prester, Dijana ; Joergensen, U.G. ; Kane, S. ; Marquette, J.B. ; Martin, R. ; Menzies, J. ; Pollard, K.R. ; Rattenbury, N. ; Sahu, K. C. ; Snodgrass, C. ; Steele, I. ; Vinter, C. ; Wambsganss, J. ; Williams, A. ; Kubiak, M. ; Pietrzynski, G. ; Soszy´nski, I. ; Szewczyk, O. ; Szymanski, M.K. ; Ulaczyk, K. ; Wyrzykowski, L.

Izvornik
Monthly notices of the Royal Astronomical Society (0035-8711) 395 (2009), 2; 787-796

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Gravitational microlensing; data modelling; extrasolar planets; binary stars; robotic telescopes

Sažetak
We outline a method for fitting binary-lens caustic-crossing microlensing events based on the alternative model parameterisation proposed and detailed in Cassan (2008). As an illustration of our methodology, we present an analysis of OGLE-2007-BLG-472, a double-peaked Galactic microlensing event with a source crossing the whole caustic structure in less than three days. In order to identify all possible models we conduct an extensive search of the parameter space, followed by a refinement of the parameters with a Markov Chain-Monte Carlo algorithm. We find a number of low-chi2 regions in the parameter space, which lead to several distinct competitive best models. We examine the parameters for each of them, and estimate their physical properties. We find that our fitting strategy locates several minima that are difficult to find with other modelling strategies and is therefore a more appropriate method to fit this type of events.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
316-0000000-2824 - Dijagnostika i fizička svojstva cirkumstelarne tvari (Dubravka Kotnik-Karuza, )

Ustanove
Sveučilište u Rijeci - Odjel za fiziku

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus