2001A&A...365L.110T

Query : 2001A&A...365L.110T

2001A&A...365L.110T - Astronomy and Astrophysics, volume 365, L110-115 (2001/1-1)

XMM-Newton first-light observations of the Hickson galaxy group 16.

TURNER M.J.L., REEVES J.N., PONMAN T.J., ARNAUD M., BARBERA M., BENNIE P.J., BOER M., BRIEL U., BUTLER I., CLAVEL J., DHEZ P., CORDOVA F., DOS SANTOS S., FERRANDO P., GHIZZARDI S., GOODALL C.V., GRIFFITHS R.G., HOCHEDEZ J.F., HOLLAND A.D., JANSEN F., KENDZIORRA E., LAGOSTINA A., LAINE R., LA PALOMBARA N., LORTHOLARY M., MASON K.O., MOLENDI S., PIGOT C., PRIEDHORSKY W., REPPIN C., ROTHENFLUG R., SALVETAT P., SAUVAGEOT J., SCHMITT D., SEMBAY S., SHORT A., STRUEDER L., TRIFOGLIO M., TRUEMPER J., VERCELLONE S., VIGROUX L., VILLA G. and WARD M.

Abstract (from CDS):

This paper presents the XMM-Newton first-light observations of the Hickson-16 compact group of galaxies. Groups are possibly the oldest large-scale structures in the Universe, pre-dating clusters of galaxies, and are highly evolved. This group of small galaxies, at a redshift of 0.0132 (or 80Mpc) is exceptional in the having the highest concentration of starburst or AGN activity in the nearby Universe. So it is a veritable laboratory for the study of the relationship between galaxy interactions and nuclear activity. Previous optical emission line studies indicated a strong ionising continuum in the galaxies, but its origin, whether from starbursts, or AGN, was unclear. Combined imaging and spectroscopy with the EPIC X-ray CCDs unequivocally reveals a heavily obscured AGN and a separately identified thermal (starburst) plasma, in NGC 835, NGC 833, & NGC 839. NGC 838 shows only starburst thermal emission. Starbursts and AGN can evidently coexist in members of this highly evolved system of merged and merging galaxies, implying a high probability for the formation of AGN as well as starbursts in post-merger galaxies.

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Journal keyword(s): galaxies: active - galaxies: starburst - X-rays: galaxies

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 NGC 833 Sy2 02 09 20.8490871072 -10 07 59.003785884   14.02 13.00 12.75   ~ 191 0
2 NGC 835 Sy2 02 09 24.606 -10 08 09.31   13.29 12.45 12.24   ~ 206 0
3 NGC 838 LIN 02 09 38.562 -10 08 46.12   13.72   12.65   ~ 195 0
4 HCG 16 CGG 02 09 40.82 -10 11 02.0           ~ 169 0
5 NGC 839 GiG 02 09 42.8 -10 11 02   13.98 11.42 12.70   ~ 151 0

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