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Probing Sagittarius A* accretion with ALMA

Published online by Cambridge University Press:  09 February 2017

Elena Murchikova
Elena Murchikova*
Affiliation:
TAPIR, California Institute of Technology, MC 350-17, Pasadena, CA 91125, USA email: lena@caltech.edu
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Abstract

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The submm Hydrogen recombination line technique can be used as a probe of the Galactic Center. We present the results of our H30α observations of ionized gas from within 0.015 pc around SgrA*. The observations were obtained on ALMA in cycle 3. The line was not detected, but we were able to set a limit on the mass of the cool gas (T~ 104 K) at 2 × 10−3M⊙. This is the unique probe of gas cooler than T ~106 K traced by X-ray emission. The total amount of gas near SgrA* gives us clues to understanding the accretion rate of SgrA*.

Keywords

Galaxy: centerISM: lines and bandsblack hole physics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S322: The Multi-Messenger Astrophysics of the Galactic Centre , July 2016 , pp. 21 - 24
Copyright
Copyright © International Astronomical Union 2017 

References

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