Surveying the LMC's Structure and Populations through SuperMACHO

Details Surveying the LMC's Structure and Populations through SuperMACHO Surveying the LMC's Structure and Populations through SuperMACHO

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005noao.prop..466o&link_type=abstract

NOAO Proposal ID #2005B-0466

Computer Science

Scientific paper

Searches for the transient brightening of LMC stars due to the gravitational lensing by foreground MACHOs have produced a peculiar result: while the event rate indicates that MACHOs comprise at most ~20% of the dark matter halo, it also far exceeds that expected from known stellar populations. The possible explanations range from the presence of previously undetected tidally stripped LMC material to halo dark matter in the form of compact stellar-mass objects. The SuperMACHO program aims to determine the nature of the lenses by collecting 10× more events than previous searches. However, critical complementary evidence must come from study of the LMC stellar populations themselves. In 2004B, the NOAO TAC awarded 6 half-nights on the CTIO 4-m and 7 nights of 1.0-m time to cover the SuperMACHO fields in B and I. Because the 2004B observing season was plagued by poor seeing, telescope problems, and the unavailability of the expected 4K imager on the CTIO 1.0-m, we are proposing for an additional 2 half- nights of CTIO 4-m time and 7 nights of CTIO 1.0-m time to complete this project. These observations will allow us to (1) reveal whether a significant fraction of events prefer a particular LMC stellar population, and (2) measure the structure of the inner LMC Bar and disk, which may help to reveal tidal debris.

Affiliated with

Also associated with

No associations

Rating

Surveying the LMC's Structure and Populations through SuperMACHO does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Surveying the LMC's Structure and Populations through SuperMACHO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surveying the LMC's Structure and Populations through SuperMACHO will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-797238