NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
An XMM-Newton Study of 9SGR and the Lagoon NebulaWe report preliminary results of an XMM-Newton observation of the 04 V star 9 Sgr (= HD 164794). 9 Sgr is one of a few single OB stars that display a non-thermal radio emission attributed to synchrotron emission by relativistic electrons. Inverse Compton scattering of photospheric UV photons by these relativistic electrons is a priori expected to generate a non-thermal power-law tail in the X-ray spectrum. Our EPIC and RGS spectra of 9 Sgr suggest a more complex situation than expected from this 'simple' theoretical picture. Furthermore, soft-band EPIC images of the region around 9 Sgr reveal a number of point sources inside the Lagoon Nebula (M8). Most of these sources have optical counterparts inside the very young open cluster NGC 6530 and several X-ray sources are associated with low and intermediate mass pre-main sequence stars. Finally, we also detect (probably) diffuse X-ray emission from the Hourglass Region that might reveal a hot bubble blown by the stellar wind of Herschel 36, the ionizing star of the HG region.
Document ID
20020047004
Acquisition Source
Goddard Space Flight Center
Document Type
Conference Paper
Authors
Rauw, G.
(Liege Univ. Belgium)
Blomme, R.
(Belgian Royal Observatory Brussels, Belgium)
Waldron, W. L.
(Emergent Technology Services Largo, MD United States)
Naze, Y.
(Liege Univ. Belgium)
Harries, T. J.
(Exeter Univ. United Kingdom)
Chapman, J. M.
(Anglo-Australian Observatory Epping, Australia)
Corcoran, M. F.
(Universities Space Research Association Greenbelt, MD United States)
Detal, A.
(Liege Univ. Belgium)
Gosset, E.
(Liege Univ. Belgium)
Date Acquired
August 20, 2013
Publication Date
January 1, 2001
Subject Category
Astronomy
Meeting Information
Meeting: New Visions of the X-Ray Universe in the XMM-Newton and Chandra Era
Country: Netherlands
Start Date: November 26, 2001
End Date: November 30, 2001
Funding Number(s)
CONTRACT_GRANT: NAG5-10113
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Document Inquiry

Available Downloads

There are no available downloads for this record.
No Preview Available