User talk:Agentjoerg/Archives/2016 1

NML Cygni

The paper 2004ApJ...610..427Z does give an effective radius of 3,737 R_☉, although they give it in cm. This is based on two assumptions: luminosity = 500,000 L_☉ and temperature = 2,500 K. The luminosity is based on a distance of 2 kpc, and is lifted directly from Morris & Jura 1983. This really has to be adjusted for the much more reliable VLBA distance of 1.61 kpc. Using a more modern IR SED fitting in Schuster 2009, the luminosity has to be adjusted to 270,000 L_☉. This is discussed fully in Zhang 2012. The temperature is more difficult. 2,500 K is lifted from an infrared fit by Monnier 1997, while 3,250 K is from spectroscopy by Ridgeway 1986. 2,500 K is considered far too low for any red supergiant by modern standards, but that in itself doesn't mean it is wrong. Zhang shows the implications of both temperatures. So 3,700 R_☉ is certainly verifiable from that paper but equally it should be considered to be wrong. A more valid upper limit would be around 2,775 R_☉ which I give in the English article. Lithopsian (talk) 14:56, 3 April 2016 (UTC)

thanks for your quick response --Agentjoerg (talk) 23:15, 4 April 2016 (UTC)

Nomination for deletion of Template:Rhine dams

Template:Rhine dams has been nominated for deletion. You are invited to comment on the discussion at the template's entry on the Templates for discussion page. Frietjes (talk) 19:05, 8 November 2016 (UTC)

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