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Titolo:
XMM-Newton first-light observations of the Hickson galaxy group 16
Autore:
Turner, MJL; Reeves, JN; Ponman, TJ; Arnaud, M; Barbera, M; Bennie, PJ; Boer, M; Briel, U; Butler, I; Clavel, J; Dhez, P; Cordova, F; Dos Santos, S; Ferrando, P; Ghizzardi, S; Goodall, CV; Griffiths, RG; Hochedez, JF; Holland, AD; Jansen, F; Kendziorra, E; Lagostina, A; Laine, R; La Palombara, N; Lortholary, M; Mason, K; Molendi, S; Pigot, C; Priedhorsky, W; Reppin, C; Rothenflug, R; Salvetat, P; Sauvageot, J; Schmitt, D; Sembay, S; Short, A; Struders, L; Trifoglio, M; Trumper, J; Vercellone, S; Vigroux, L; Villa, G; Ward, M;
Indirizzi:
Univ Leicester, Dept Phys & Astron, Xray Astron Grp, Leicester LE1 7RH, Leics, England Univ Leicester Leicester Leics England LE1 7RH er LE1 7RH, Leics, England Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, W Midlands, England Univ Birmingham Birmingham W Midlands England B15 2TT W Midlands, England CEA Saclay, F-91191 Gif Sur Yvette, France CEA Saclay Gif Sur Yvette France F-91191 F-91191 Gif Sur Yvette, France CESr tOULOUSE, F-31028 Toulouse 4, France CESr tOULOUSE Toulouse France 4 ESr tOULOUSE, F-31028 Toulouse 4, France Max Planck Inst Extraterr Phys, D-85748 Garching, Germany Max Planck Inst Extraterr Phys Garching Germany D-85748 arching, Germany ESA, SOC, Madrid 28080, Spain ESA Madrid Spain 28080ESA, SOC, Madrid 28080, Spain Univ Paris Sud, LURE, F-91405 Orsay, France Univ Paris Sud Orsay France F-91405 ris Sud, LURE, F-91405 Orsay, France Univ Calif Santa Barbara, Res Off, Santa Barbara, CA 93106 USA Univ Calif Santa Barbara Santa Barbara CA USA 93106 Barbara, CA 93106 USA IFC Milan, I-20133 Milan, Italy IFC Milan Milan Italy I-20133IFC Milan, I-20133 Milan, Italy PS Estec, NL-2200 AG Noordwijk, Netherlands PS Estec Noordwijk Netherlands NL-2200 AG 2200 AG Noordwijk, Netherlands Univ Tubingen, IAAP, D-72076 Tubingen, Germany Univ Tubingen Tubingen Germany D-72076 , IAAP, D-72076 Tubingen, Germany PX Estec, NL-2200 AG Noordwijk, Netherlands PX Estec Noordwijk Netherlands NL-2200 AG 2200 AG Noordwijk, Netherlands Univ Coll London, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England Univ Coll London Dorking Surrey England RH5 6NT RH5 6NT, Surrey, England Univ Calif Los Alamos Natl Lab, Los Alamos, NM 87545 USA Univ Calif Los Alamos Natl Lab Los Alamos NM USA 87545 amos, NM 87545 USA Univ Paris Sud, Inst Astrophys Spatiale, F-91405 Orsay, France Univ Paris Sud Orsay France F-91405 phys Spatiale, F-91405 Orsay, France Osserv Astron Palermo, I-90134 Palermo, Italy Osserv Astron Palermo Palermo Italy I-90134 ermo, I-90134 Palermo, Italy ITESRE, I-41010 Bologna, Italy ITESRE Bologna Italy I-41010ITESRE, I-41010 Bologna, Italy
Titolo Testata:
ASTRONOMY AND ASTROPHYSICS
fascicolo: 1, volume: 365, anno: 2001,
pagine: L110 - L115
SICI:
0004-6361(200101)365:1<L110:XFOOTH>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
COMPACT-GROUPS; EMISSION; HCG-16;
Keywords:
galaxies : active; galaxies : starburst; X-rays : galaxies;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
16
Recensione:
Indirizzi per estratti:
Indirizzo: Reeves, JN Univ Leicester, Dept Phys & Astron, Xray Astron Grp, Leicester LE1 7RH, Leics, England Univ Leicester Leicester Leics England LE1 7RH Leics, England
Citazione:
M.J.L. Turner et al., "XMM-Newton first-light observations of the Hickson galaxy group 16", ASTRON ASTR, 365(1), 2001, pp. L110-L115

Abstract

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 80 Mpc) 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 continuumin 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 starburstthermal 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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Documento generato il 29/10/20 alle ore 20:09:21