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.

• 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.

Thanks, CarpD 4/3/07

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.

• CTTS = Classical T-Tauri Star
• WTTS = Weak-line T-Tauri Star
• NTTS = Naked T-Tauri Star
• PTTS = Post T-Tauri Star

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)

Found more information:

Intermediate stars, below - Mass = 1-2 Ms
Molecular Cloud	YSO	YSO	YSO	YSO	YSO	star
Pre-stellar dense core	Protostar	Protostar	Protostar	CTTS / PMS	WTTS / PMS	ZAMS
SEDS classification	Class 0	Class I	Flat Specturm (F.S.)	Class II	Class III	star
Massive stars, below - Mass = 2-10 Ms
Molecular Cloud	MYSO	MYSO	???	MYSO	MYSO	star
SEDS classification	Class 0	Class I	???	Class II	Class III	star
Pre-stellar dense core	Massive Protostar	Massive Protostar	???	HAeBe	HAeBe	ZAMS
Super Massive stars, below - Mass = > 5 Ms
Does not have a PMS stage as they transfer into stars very quickly.

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. [1]
NTTS: A low mass PMS that observationally show no evidence of optically thick circumstellar disk or on-going accretion. [2]
Young stars and their protostellar precursors are referred to as "Young Stellar Objects", YSOs, Strom 1972; [3]
--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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