Evidence of interstellar molecular gas and dust orbiting around the supermassive black hole at the centre of the Milky Way

Credit: ALMA (ESO/NAOJ/NRAO)/ J. R. Goicoechea (Instituto de Física Fundamental, CSIC, Spain)

Dr. Javier R. Goicoechea is leading a new research that proves the existence of short-lived molecular cloudlets (ages less than 10,000 years and total mass of about 60 solar masses) around Sgr A*, the location of the super massive black hole at the centre of our galaxy. This research has revealed exciting evidence of molecular gas, the fuel that forms stars, orbiting within the central parsec of the Milky Way at high speeds, up to about 300 km/s. The images (1″-resolution ALMA observations, see above) reveal the small spatial scale morphology of the interstellar gas in this fascinating region and the presence of molecular “cloudlets” (less than 20,000 AU size) at about one light year from SgrA*. While it is unlikely that the observed cloudlets will directly form new massive stars, their presence is a piece of the puzzle toward understanding the formation of stars close to supermassive black holes. The above image is ESO’s Picture of the Week (see below).

More information:

This research was presented in the paper “High-speed molecular cloudlets around the Galactic center’s supermassive black hole“, published in Astronomy and Astrophysics Volume 618,  A35 (19pp), 11 October 2018. The authors are: Javier R. Goicoechea (Instituto de Física Fundamental, IFF-CSIC, Madrid, Spain), Jerome Pety (Institut de Radioastronomie Millimétrique (IRAM), France), Edwige Chapillon (Institut de Radioastronomie Millimétrique (IRAM) and OASU/LAB-UMR5804, CNRS, Université Bordeaux, France), José Cernicharo (Instituto de Física Fundamental, IFF-CSIC, Madrid, Spain), Maryvonne Gerin (Sorbonne Université, Observatoire de Paris, France), Cinthya Herrera (Institut de Radioastronomie Millimétrique (IRAM), France), Miguel A. Requena-Torres (Department of Astronomy, University of Maryland, USA) and Miriam G. Santa-Maria (Instituto de Física Fundamental, IFF-CSIC, Madrid, Spain).

Link to ESO Picture of the Week and description (European Southern Observatory)


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