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CURRENT OBSERVATIONS FROM RADIO TO GAMMA RAYS ARE OFFERING AN AMAZING AND UNPRECEDENTED VIEW OF THE SKY UNVEILING PROPERTIES OF THE DIFFUSE EMISSION IN THE MILKY WAY MOSTLY ASSOCIATED WITH COSMIC RAYS AND MAGNETIC FIELDS. INDEED RECENT OBSERVATIONS AT THE OPPOSITE FREQUENCIES OF THE ELECTROMAGNETIC SPECTRUM SUCH AS MICROWAVES WITH PLANCK AND GAMMA RAYS WITH FERMI LAT HAVE REVEALED DIFFUSE EMISSION FROM THE MILKY WAY WHICH IS PRODUCED BY COSMIC RAYS INTERACTING WITH THE INTERSTELLAR MEDIUM AND MAGNETIC FIELDS DURING THEIR ACCELERATION AND PROPAGATION IN THE GALAXY. MANY REGIONS OF UNEXPLAINED ENHANCED EMISSION SHOW UP AS GALACTIC LARGE-SCALE FEATURES WHICH SOMETIMES SEEM TO PARTIALLY OVERLAP AT DIFFERENT FREQUENCIES. HOWEVER THESE FEATURES DEPEND ON THE MODEL ASSUMPTION FOR THE DISTRIBUTION AND DENSITY OF COSMIC RAYS AND MAGNETIC FIELDS ACROSS THE GALAXY WHICH ARE POORLY KNOWN. AN EXPLANATORY EXAMPLE OF THESE FEATURES IS THE FAMOUS FERMI BUBBLES SEEN IN GAMMA RAYS TWO LARGE LOBE-LIKE STRUCTURES LIKELY EXTENDING ~10 KPC FROM THE GALACTIC CENTER POSSIBLY BEING A SIGNAL OF THE PAST ACTIVITY OF THE MILKY WAY S BLACK HOLE. THE FERMI BUBBLES CAN POTENTIALLY BE CONNECTED TO THE HAZE AND/OR LOOPS AND SPURS SEEN IN MICROWAVES AND WHOSE ORIGIN IS STILL UNKNOWN. BY ANALYZING PUBLICLY AVAILABLE NASA DATA WE PROPOSE TO INVESTIGATE THE LARGE-SCALE DISTRIBUTION AND DENSITY OF COSMIC RAYS AND MAGNETIC FIELDS IN THE GALAXY PRODUCING DIFFUSE EMISSION. WE ALSO PROPOSE TO SPATIALLY AND SPECTRALLY CHARACTERIZE THE UNEXPLAINED DIFFUSE FEATURES OF PUBLICLY AVAILABLE DATA FROM RADIO TO GAMMA RAYS. RESULTS FOR A VARIETY OF NASA SPACE MISSIONS WILL BE MADE AVAILABLE TO THE SCIENTIFIC COMMUNITY FOR REPRODUCIBILITY AND FOR FURTHER STUDIES WITH THE EFFECT OF ENHANCING THE OUTCOME OF THE ADAP PROGRAM IN PARTICULAR AND THE NASA MISSIONS IN GENERAL.

$499,889FY2022National Aeronautics and Space AdministrationNASA

Eureka Scientific, Inc.

Investigators

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