000001945 001__ 1945
000001945 005__ 20160701171655.0
000001945 0247_ $$2DOI$$a10.1051/0004-6361:20021230
000001945 037__ $$aASTROimport-102
000001945 100__ $$aRauw, G.
000001945 245__ $$aAn XMM-Newton observation of the Lagoon Nebula and the very young open cluster NGC 6530
000001945 260__ $$c2002
000001945 520__ $$aWe report the results of an XMM-Newton observation of the Lagoon Nebula (M 8). Our EPIC images of this region reveal a cluster of point sources, most of which have optical counterparts inside the very young open cluster NGC 6530. The bulk of these X-ray sources are probably associated with low and intermediate mass pre-main sequence stars. One of the sources experienced a flare-like increase of its X-ray flux making it the second brightest source in M 8 after the O4 star 9 Sgr. The X-ray spectra of most of the brightest sources can be fitted with thermal plasma models with temperatures of kT ~ a few keV. Only a few of the X-ray selected PMS candidates are known to display Ha emission and were previously classified as classical T Tauri stars. This suggests that most of the X-ray emitting PMS stars in NGC 6530 are weak-line T Tauri stars. In addition to 9 Sgr, our EPIC field of view contains also a few early-type stars. The X-ray emission from HD 164816 is found to be typical for an O9.5 III-IV star. At least one of the known Herbig Be stars in NGC 6530 (LkHa 115) exhibits a relatively strong X-ray emission, while most of the main sequence stars of spectral type B1 and later are not detected. We also detect (probably) diffuse X-ray emission from the Hourglass Region that might reveal a hot bubble blown by the stellar wind of Herschel 36, the ionizing star of the Hourglass Region. Based on observations with XMM-Newton, an ESA Science Mission with instruments and contributions directly funded by ESA Member states and the USA (NASA). 
000001945 700__ $$a Nazé, Y.
000001945 700__ $$a Gosset, E.
000001945 700__ $$a Stevens, I. R.
000001945 700__ $$a Blomme, R.
000001945 700__ $$a Corcoran, M. F.
000001945 700__ $$a Pittard, J. M.
000001945 700__ $$a Runacres, M. C.
000001945 773__ $$c499-513$$pAstronomy and Astrophysics$$v395$$y2002
000001945 85642 $$ahttp://esoads.eso.org/abs/2002A%26A...395..499R
000001945 905__ $$apublished in
000001945 980__ $$aREFERD