When nature tries to trick us: An eclipsing eccentric close binary superposed on the central star of the planetary nebula M 3-2

Henri M.J. Boffin, David Jones, Roger Wesson, Yuri Beletsky, Brent Miszalski, Ivo Saviane, Lorenzo Monaco, Romano Corradi, Miguel Santander García, Pablo Rodríguez-Gil

Resultado de la investigación: Contribución a una revistaArtículo

3 Citas (Scopus)

Resumen

Bipolar planetary nebulae (PNe) are thought to result from binary star interactions and, indeed, tens of binary central stars of PNe have been found, in particular using photometric time-series that allow for the detection of post-common envelope systems. Using photometry at the NTT in La Silla we have studied the bright object close to the centre of PN M 3-2 and found it to be an eclipsing binary with an orbital period of 1.88 days. However, the components of the binary appear to be two A or F stars, of almost equal mass, and are therefore too cold to be the source of ionisation of the nebula. Using deep images of the central star obtained in good seeing conditions, we confirm a previous result that the central star is more likely much fainter, located 2″ away from the bright star. The eclipsing binary is thus a chance alignment on top of the planetary nebula. We also studied the nebular abundance and confirm it to be a Type I PN.

Idioma originalInglés
Número de artículoA84
PublicaciónAstronomy and Astrophysics
Volumen619
DOI
EstadoPublicada - 1 nov 2018

Áreas temáticas de ASJC Scopus

  • Astronomía y astrofísica
  • Ciencias planetarias y espacial

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    Boffin, H. M. J., Jones, D., Wesson, R., Beletsky, Y., Miszalski, B., Saviane, I., Monaco, L., Corradi, R., Santander García, M., & Rodríguez-Gil, P. (2018). When nature tries to trick us: An eclipsing eccentric close binary superposed on the central star of the planetary nebula M 3-2. Astronomy and Astrophysics, 619, [A84]. https://doi.org/10.1051/0004-6361/201833693