Talk:Solar analog

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[edit] Definition

I'm curious what others think of using the definitions from The Second Annual Lowell Observatory Fall Workshop for this page. These are:

• Solar-Type: 0.48 to 0.80 in B-V (roughly equivalent to F8 V—K2 V)
• Solar Analog
  • Temp. ± 500 K solar (roughly 5200—6300 K)
  • Metallicity 0.5—2.0 solar
  • No close companion (that is, a companion with an orbital period of 10 days or less)
• Solar Twin
  • Temp. ± 10 K solar
  • Metallicity 0.89—1.12 solar
  • No companion
  • Age ± 1 Ga solar (3.59—5.59 Ga)

Pfhreak (talk) 02:08, 9 January 2008 (UTC)

Yes, a useful link you've got there. ~10 K solar! Wow: is any star going to meet this? If 18 Scorpii really is exactly 5800 K, it's at least within the low double digits but still wouldn't be a twin. Conversely, variability gets no mention. Marskell (talk) 12:44, 30 January 2008 (UTC)

A good point about the temperature range. Maybe ± 50 K solar (roughly 5720—5830 K) would be more realistic, and it would still be an order of magnitude more precise than the temperature range for analogues. Pfhreak (talk) 17:05, 30 January 2008 (UTC)

I had the same thought. Feel free to make the addition, BTW. You might see Margaret Turnbull for more. Marskell (talk) 15:57, 31 January 2008 (UTC)

A first draft, after much delay, is available for feedback at: User:Pfhreak/Solar Twin Pfhreak (talk) 18:05, 26 February 2008 (UTC)