Searching for Obscured ULX in LIRGS: a Deep Observation of NGC7552
Abstract
Luminous infrared galaxies (LIRGs) are the most powerful star-forming galaxies in the nearby Universe. Recent Chandra observations suggest that the most infrared bright starburst LIRGS are deficient in Ultra-Luminous X-ray Sources (ULX) relative to galaxies with lower star formation rates. The observed deficit may be real, perhaps due to a higher metallicity in these systems. Alternately, the the ULX in LIRGs may be highly obscured or not detected as point sources due to source confusion. We request a long (200 ks) exposure of the nearby LIRG NGC 7552. Our primary science goal is to search for obscured ULX. NGC 7552 is an ideal candidate for this study because it is close by, has a high SFR and metallicity.
- Publication:
-
Chandra Proposal
- Pub Date:
- September 2017
- Bibcode:
- 2017cxo..prop.5134P