Talk:T Tauri star

Contraction time
Contraction time is about 108 only if the mass of the protostar is 1 solar mass. The text is too precise. Rursus 22:44, 16 November 2006 (UTC)

Not to mention which the statement that contraction time is 108 years for a 1 solar mass star could really do with a specific reference, as could much of the rest of the article to be honest and preferably ones that are freely available to the general public and less than 20 years old. Physdragon (talk) 00:09, 10 March 2010 (UTC)

CTTS & WTTS
Not sure where to add this. Thanks, CarpD 4/3/07
 * Classical T-Tauri Star (CTTS)
 * actively accreting matter, UV & Infared excess.
 * Weak line T-Tauri Star (WTTS)
 * not accreting or barely accreting matter, no UV or Infared excess.

You're right- these definitely need to be added. I suggest right before the picture "protoplanetary disks in the orion nebula" (I added a comment in the page there)

Cschim (talk) 23:08, 18 January 2008 (UTC)

I will take a look. Trying to verify this, first. TTS region         PTTS   "PTTS gap"    ZAMS region CTTS ─► WTTS ─► PTTS ─► PTTS/ZAMS ─► ZAMS |      └► NTTS ─► PTTS ─► PTTS/ZAMS ─► ZAMS └► PTTS ─► PTTS/ZAMS ─► ZAMS Thanks, Marasama (talk) 16:00, 6 November 2008 (UTC)
 * CTTS = Classical T-Tauri Star
 * WTTS = Weak-line T-Tauri Star
 * NTTS = Naked T-Tauri Star
 * PTTS = Post T-Tauri Star

Found more information: PTTS: It is not fully accepted that PTTS is older than CTTS or WTTS; it is an observational 'tool' for certifying that an object is not accreting materials.  NTTS: A low mass PMS that observationally show no evidence of optically thick circumstellar disk or on-going accretion.  Young stars and their protostellar precursors are referred to as "Young Stellar Objects", YSOs, Strom 1972; --Marasama (talk) 18:52, 17 October 2021 (UTC)

The Sun
This article suggests that these stars are different from the Sun in a number of ways, but Sun says that the Sun is a T Tauri star. This needs clarification by someone more qualified than me. :P 70.90.176.206 (talk) 21:44, 8 July 2009 (UTC)
 * I keep encountering references to the Sun having probably gone through a T Tauri stage. Zyxwv99 (talk) 20:23, 18 March 2016 (UTC)
 * T Tauri stars represent an early stage of evolution of stars with masses similar to the Sun. The Sun therefore likely went through a T Tauri stage, but it is certainly not a T Tauri star at present. --Yaush (talk) 17:14, 21 March 2016 (UTC)

Dubious
Please see the lithium burning talk page for a discussion about the actual reaction particles and energies involved.

T Tauri pic
Since TTS stars are based on the original T Tauri star, there probably should be a picture showing the original T Tauri star on this page. Thanks, Marasama (talk) 21:19, 13 February 2012 (UTC)

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