A survey of Orion a with xmm and Spitzer: soxs goals for the soxs

A Survey of Orion A with XMM and Spitzer: SOXS

Goals for the SOXS

Orion A

Orion A

Orion A

The Spitzer Survey of Orion A

The Spitzer Survey of Orion A

The Spitzer Survey of Orion A

By the Numbers

• 1161 X-ray sources in the 9 fields

• Nearly 100,000 IRAC sources in those fields.

• About 140 Class I Sources in those fields
• About 550 Class II sources are in the 9 fields.
• About 220 (~45%) of the Class II sources were detected by XMM.
• Of the 1161 X-ray sources, 882 have counterparts in the Spitzer Survey.

Contamination by Background X-ray Sources

Colors of X-ray Sources

L1641 S

L1641 S

L1641 N

Stellar Content of Orion A

Caveats

• Need to really work field by field

• Need to account for contamination from Orion 1A

• Should be small

• Examine influence of Ori.

Status

• Survey Completed March 2008

• Of the 1161 X-ray sources, 882 have counterparts in the Spitzer Survey.

• About 563 have IRAC colors consistent with Class III sources

• 99 have colors consistent with agn

• 221 have colors consistent with CII.

• The total number of stars in the 9 fields of Orion A is about 2100.

• The Class III sources appear more dispersed than the Class II sources.

Why Bother Looking at Young Stars in X-rays?

COUP study of the ONC

Orion A OB stars

The Spitzer Survey of Orion A

OB STARS