A dataset provided by the European Space Agency

Name OT1_cdowell_2
Title Coordinated Study of Flare Emission from Sgr A*, the Closest Supermassive Black Hole
URL

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DOI 10.5270/esa-65iaeax
Author dowell, c. d.
Description Coordinated study of flare emission from Sgr A*, the closest supermassive black hole, reveals information about the hydrodynamics, energetics, and accretion behavior of matter within the innermost ten Schwarzschild radii. We propose to use the unique capability of Herschel-SPIRE and XMM in order to characterize flare emission simultaneously at many different wavelengths, the most important of which are completely unavailable from the ground. These measurements will explore the nature of emission at the peak of the spectrum of Sgr A* and will determine the transition wavelength at which the variable emission becomes optically thin. In particular, we will test the prediction that there will be time delay between X-ray flares and the peak emission at 250, 350, and 500 microns. We will take advantage of the calibration stability of Herschel resulting from the L2 placement to detect Sgr A* in SPIRE difference images. The proposed Herschel and XMM observations form the cornerstone of a multi-wavelength campaign that includes observations in near-IR and radio wavelengths. The cross correlation of flare emission at multiple wavelengths will have far-reaching implications for testing the emission mechanism of Sgr A* and for understanding the processes of accretion onto and outflow from the closest supermassive black hole. Lastly, a long flux monitoring of Sgr A* with Herschel over long and nearly continuous baselines will characterize the fraction of time that Sgr A* is active in submm wavelengths and will provide a legacy to unravel the key properties of the best example of a low-luminosity massive black hole.
Publication Far Infrared Variability of Sagittarius A*: 25.5 hr of Monitoring with Herschel . Stone Jordan M. et al. . The Astrophysical Journal, Volume 825, Issue 1, article id. 32, 9 pp. (2016). . 825 . 10.3847\/0004-637X\/825\/1\/32 . 2016ApJ...825...32S ,
Instrument SPIRE_SpirePhoto_small
Temporal Coverage 2011-08-31T22:01:15Z/2011-09-02T09:22:01Z
Version SPG v14.1.0
Mission Description Herschel was launched on 14 May 2009! It is the fourth 'cornerstone' mission in the ESA science programme. With a 3.5 m Cassegrain telescope it is the largest space telescope ever launched. It is performing photometry and spectroscopy in approximately the 55-671 ┬Ám range, bridging the gap between earlier infrared space missions and groundbased facilities.
Creator Contact https://support.cosmos.esa.int/herschel/
Date Published 2012-03-02T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2012-03-02T00:00:00Z, OT1_cdowell_2, SPG v14.1.0. https://doi.org/10.5270/esa-65iaeax