The central star of the Planetary Nebula NGC 6537

Details The central star of the Planetary Nebula NGC 6537 The central star of the Planetary Nebula NGC 6537

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000a%26a...362l..17p&link_type=abstract

Astronomy and Astrophysics, v.362, p.L17-L20 (2000)

Astronomy and Astrophysics

Astrophysics

4

Stars: Fundamental Parameters, Ism: Planetary Nebulae: General, Ism: Planetary Nebulae: Individual: Ngc 6537

Scientific paper

The fact that Space Telescope WFPC2 images of the planetary nebula NGC 6537 fail to show the central star is used to derive a limit to its magnitude: it is fainter than a magnitude of 22.4 in the visible. This is used to derive a lower limit to the temperature of the star. The Zanstra temperature is at least 500 000 K. The Energy Balance temperature is found to be consistent with this value, as is the ionization state of the nebula. Assuming a reasonable range of distances for the nebula, the radius of the star can be found. It is consistent with the mass-radius relation of a white dwarf of 0.9 Msun or higher.

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