The BeppoSAX view of the hard X-ray background

被引：5

作者：

Comastri, A

Fiore, F

Giommi, P

La Franca, F

Elvis, M

Matt, G

Molendi, S

Perola, GC

机构：

[1] Osservatorio Astron Bologna, I-40127 Bologna, Italy

[2] Osserv Astron Roma, I-00044 Monte Porzio Catone, Italy

[3] Nuova Telespazio, SAX Sci Data Ctr, I-00131 Rome, Italy

[4] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA

[5] Univ Roma Tre, Dipartimento Fis, I-00146 Rome, Italy

[6] CNR, Ist Fis Cosm & Tecnol Relat, I-20133 Milan, Italy

来源：

BROAD BAND X-RAY SPECTRA OF COSMIC SOURCES | 2000年 / 25卷 / 3-4期

关键词：

D O I：

10.1016/S0273-1177(99)00850-9

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

First results on a medium-deep X-ray survey in the "new" 5-10 keV band carried out with the MECS detectors onboard BeppoSAX are presented. The High Energy Llarge Area Survey (HELLAS) is aimed to directly explore a band where the energy density of the X-ray background is more than twice than that in the soft (0.5-2.0 keV) band. The optical identification follow-up of the first ten HELLAS hard X-ray sources indicate that Active Galactic Nuclei are the dominant population at 5-10 keV fluxes of the order of 10(-13) erg cm(-2) s(-1). We discuss the implications of these findings for the AGN synthesis models for the XRB. (C) 2000 COSPAR. Published by Elsevier Science Ltd.

引用

页码：833 / 838

页数：6

共 28 条

[1]

AKIYAMA M, 1998, P XMM M

[2] UNIFIED MODELS FOR ACTIVE GALACTIC NUCLEI AND QUASARS [J].

ANTONUCCI, R .

ANNUAL REVIEW OF ASTRONOMY AND ASTROPHYSICS, 1993, 31 :473-521

[3] The medium-energy concentrator spectrometer on board the BeppoSAX X-ray astronomy satellite [J].

Boella, G ;

Chiappetti, L ;

Conti, G ;

Cusumano, G ;

DelSordo, S ;

LaRosa, G ;

Maccarone, MC ;

Mineo, T ;

Molendi, S ;

Re, S ;

Sacco, B ;

Tripiciano, M .

ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1997, 122 (02) :327-340

[4] BeppoSAX, the wide band mission for X-ray astronomy [J].

Boella, G ;

Butler, RC ;

Perola, GC ;

Piro, L ;

Scarsi, L ;

Bleeker, JAM .

ASTRONOMY & ASTROPHYSICS SUPPLEMENT SERIES, 1997, 122 (02) :299-307

[5]

Boyle BJ, 1998, MON NOT R ASTRON SOC, V296, P1, DOI 10.1046/j.1365-8711.1998.01098.x

[6] A medium survey of the hard X-ray sky with the ASCA gas imaging spectrometer: The (2-10 keV) number counts relationship [J].

Cagnoni, I ;

Della Ceca, R ;

Maccacaro, T .

ASTROPHYSICAL JOURNAL, 1998, 493 (01) :54-61

[7]

COMASTRI A, 1995, ASTRON ASTROPHYS, V296, P1

[8]

COMASTRI A, 1999, IN PRESS MEM SOC AST

[9] Do nuclear starbursts obscure the X-ray background? [J].

Fabian, AC ;

Barcons, X ;

Almaini, O ;

Iwasawa, K .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1998, 297 (01) :L11-L15

[10]

FIORE F, 1999, UNPUB MON NOT R ASTR

← 1 2 3 →