THE HUNT FOR SUPERMASSIVE BLACK HOLES (SMBHS) IN LOCAL DWARF GALAXIES IS CRUCIAL TO OUR UNDERSTANDING OF THE ORIGINS OF SMBHS . WHILE RECENT STUDIES HAVE FOUND OPTICAL SIGNATURES OF AGNS IN A GROWING POPULATION OF DWARF GALAXIES THESE STUDIES ARE BIASED TOWARD REDDER GALAXIES WITH HIGHER SERSIC INDICES WHERE DILUTION FROM STAR FORMATION IS LESS SIGNIFICANT AND GALAXIES WITH SUPER-SOLAR METALLICITY. THIS IS A SEVERE LIMITATION SINCE THE PREMISE BEHIND THE USE OF DWARF GALAXIES TO PROBE SEED BLACK HOLES RESTS ON THE ASSUMPTION THAT THEY HAVE HAD A QUIESCENT COSMIC HISTORY FREE OF EXTERNAL FACTORS SUCH AS MERGING OR TIDAL STIRRING BOTH OF WHICH WOULD DRIVE GAS TO THE CENTER FUELING STAR FORMATION ENRICHING THE GAS INCREASING THE SERSIC INDEX AND POTENTIALLY FUELING THE SMBH. OPTICAL STUDIES THEREFORE FAVOR THE WRONG DEMOGRAPHIC IN WHICH TO HUNT FOR THE RELICS OF SMBH SEEDS. IN THIS PILOT STUDY WE PROPOSE TO OBSERVE WITH XMM-NEWTON A SAMPLE OF THE LOWEST METALLICITY GALAXIES WITH MID-INFRARED COLORS INDICATIVE OF DOMINANT AGNS BASED ON STRINGENT MIR SELECTION CRITERIA. IF THE AGNS ARE CONFIRMED IN THESE OBJECTS THIS STUDY WILL PROVIDE THE LOWEST METALLICITY AGNS KNOWN IN THE LOCAL UNIVERSE AND PROVIDE THE FIRST EVIDENCE FOR AGNS IN GALAXIES THAT ARE TRULY MORE REPRESENTATIVE OF LOCAL ANALOGS OF EARLY GALAXIES. THE EXQUISITE SENSITIVITY OF XMM IS CRUCIAL TO CONFIRM THE PRESENCE OF AGNS AND TO CONSTRAIN THEIR PROPERTIES.
$63,434FY2020National Aeronautics and Space AdministrationNASA
George Mason University, Fairfax VA