young stellar object

Alert Notice 846: AB Aur HST observations on January 17-18

Note: The HST observations of AB Aur scheduled for 2024 January 17-18 have been cancelled because HST has gone into safe mode. Rescheduling information will be given here and in the forum threads below when available. In the meantime, please continue to observe AB Aur according to the cadence given below.  -  Elizabeth O. Waagen, January 17, 2024

January 15, 2024

Alert Notice 842: AB Aur monitoring requested for HST observations

November 15, 2023
 
Notes: In the original version of this Alert Notice, the Rc magnitude of the CHECK star was in error. The correct Rc magnitude for the CHECK star is 11.382.  -  Elizabeth O. Waagen, December 12, 2023
 
A webinar on AB Aur and this campaign took place on November 19, 2023. See below under "What to Expect" for details.

The Trapezium, BM Orionis, and Young Stellar Objects

Just over one year ago, a small spacecraft called MOST began a month-long observing run on one of the most spectacular objects in Earth's skies, the beautiful Trapezium region at the heart of the Orion Nebula, M42.  My collaborators and I applied for and received this observing time to survey variability in this young stellar cluster -- partly to study the eclipsing binary BM Ori (theta 01 Orionis B), but also to survey as many young stars that we were able to using the unique capabilities of MOST.  Since then, I along with my collaborators -- our Director Arne H

Special Notice #235: Request for archival data: V1647 Ori and McNeil's Nebula

February 15, 2011: Dr. Colin Aspin (U. Hawaii) has requested archival images and other observations of the FU Orionis variable V1647 Ori and the surrounding field over the previous 10 years in support of a study of this star.  Aspin writes that he is hoping to obtain more data with which to create a multi-year light curve of this star to put present-day observations in context of its past behavior.