Skip to main content


YSO Papers

Many scientific papers have been, and continue to be, published with regard to young stars and associated phenomena. This page lists resources that AAVSO members may find interesting.

Long-term light curves of 4 young variable stars (Peneva et al, 2010)

An interesting look at a selection of PMS objects. Though none are as yet on our programme, the paper gives a good overview of the current state of play in the field.


Here we hope to answer some of the questions observers ask about YSOs. If there is anything that isn't covered in the points below, why not drop me an email?

What is the T Tauri Wind?

The YSO Zoo

...and welcome to the Zoo!

Part of the reason why a YSO section is needed is to try and make some sense of how the different types of variable star fit into some sort of scheme. Should we view the various types as distinct, or should we look at behaviour instead? Pursuing the zoo theme for a while, how do the various types of YSO fit into the interstellar ecosystem?

Suggested Observing Cadences for Variable Star Types

Something you need to consider carefully, and a question that comes up often with new observers is "How often should I observe my program stars?" The answers depend largely on the type of stars you are observing. The following table is a general guideline. As you learn more about the different types of variables, and the personalities of some of the specific stars you choose to observe, you may decide to observe them more or less often than suggested here.

Variable Type

Cadence in days

Active Galaxies (AGN)


AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484