SOFIA Highlights: Galactic center

SOFIA/FORCAST Observations of the Pistol and LBV3 Nebulae

Ryan Lau of Cornell University and his collaborators presented a poster paper analyzing SOFIA/FORCAST observations of mass loss from extremely luminous stars near the center of the Milky Way Galaxy during the 223rd meeting of the American Astronomical Society in Washington, DC.

The Galaxy's Central Molecular Zone

SOFIA measurements of ionized carbon and nitrogen gas at the edge of the Central Molecular Zone (CMZ) of the Milky Way were made with the GREAT far-IR heterodyne spectrometer (P.I. Rolf Güsten, MPIfR) as a part of SOFIA’s Guest Investigator program. The observations were made over the course of several nights in July 2013 during SOFIA’s first Southern Hemisphere deployment.

The CMZ is a 400 pc x 80 pc region around the galactic center containing 10 million solar masses of giant molecular clouds, many regions of active star formation, and frequent supernova explosions. 

SOFIA/FORCAST mid-IR image of the Sagittarius A East region in the Galactic Center

SOFIA/FORCAST images of the H II (ionized hydrogen) complex G0.02-0.07 resolved a string of three compact HII regions (labeled A, B, and C in Figure 1) plus two new infrared sources designated FIRS 1 and 2 (Figures 1 and 2). G0.02-0.07 is located in the Sagittarius A (Sgr A) region, 6 pc (20 light years) from our line of sight to the center of the Milky Way Galaxy. The Galactic Center includes a hot, turbulent interstellar medium, cloud-cloud collisions, stellar winds, and supernova shocks.

SOFIA/FORCAST mid-infrared image of the Milky Way Galaxy's nucleus

Researchers using the Stratospheric Observatory for Infrared Astronomy (SOFIA) have captured new images of a ring of gas and dust seven light-years in diameter surrounding the supermassive black hole at the center of the Milky Way, and of a neighboring cluster of extremely luminous young stars embedded in dust cocoons.