Talk:Frost line (astrophysics)

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It would be useful to give how distant was frost line in our solar system while forming. For sure was further than Earth, ne? --84.10.228.217 (talk) 16:52, 11 July 2008 (UTC)

that would depend on the luminosity of the sun, which would have varied according to its evolution as a main sequence star. -- 99.233.186.4 (talk) 21:38, 9 February 2010 (UTC)

Source

Some more information can be found here in case anyone else would like to add to this page before I get a chance to. AstroMark (talk) 23:44, 25 January 2009 (UTC)

Earth has ice

If the frost line of our Solar system is 2.7 AE, how can both Earth and Mars, which are further inside, have large amounts of water ice?--Roentgenium111 (talk) 17:51, 12 September 2010 (UTC)

Asteroid and comets impacts could have easily brought water-ice with them. Keep in mind that Earth is a dry planet that is only 1.5% water by weight. -- Kheider (talk) 13:03, 10 February 2011 (UTC)

A Thought

I don't suppose, by and chance, there would be an analogous phenomenon for steam, say... closer in toward the star? I don't know of any 'steam and dust belts', as it were, but I just thought I'd ask. 67.171.222.203 (talk) 17:00, 25 April 2014 (UTC)

Several

"However, gas giant planets have been found inside the frost line around several other stars ..." As of Jan 27, 2015 Wikipedia lists 32 exoplanets discovered by Kepler which are 1. estimated to be larger than 0.8 Jupiter masses and 2. have an orbital period of < 150 days (many of them less than 20 days). This suggests that the whole concept of a frost line may be wrong, but that certainly "several other stars" should be changed to "many other stars". I grant you that using current orbital period as a proxy for distance at formation and that distance as a proxy for temperature/irradiation early in formation history isn't very rigorous, but using citations from 2007 as sources when the field is changing so dramatically is also questionable.Abitslow (talk) 20:40, 27 January 2015 (UTC)

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tracer gas?

Not an expert, but how would an astronomer use a tracer gas? The linked article makes it sound like tracer gases refer to compounds being added to systems to find leaks, etc., which is not possible in a star system. Is this an error, or does it just need more explanation?

"Each volatile substance has its own frost line (e.g. carbon monoxide,[1] nitrogen,[2] and argon[3]), so it is important to always specify which material's frost line is referred. A tracer gas may be used for materials that are otherwise difficult to detect; for example diazenylium for carbon monoxide." — Preceding unsigned comment added by 71.206.229.224 (talk) 19:41, 13 November 2023 (UTC)