2006A&A...452L..23N


Query : 2006A&A...452L..23N

2006A&A...452L..23N - Astronomy and Astrophysics, volume 452, L23-26 (2006/6-4)

A Lyman-α blob in the GOODS South field: evidence for cold accretion onto a dark matter halo.

NILSSON K.K., FYNBO J.P.U., MOLLER P., SOMMER-LARSEN J. and LEDOUX C.

Abstract (from CDS):

We report on the discovery of a z=3.16 Lyman-α emitting blob in the Great Observatories Origins Deep Survey (GOODS) South field. The discovery was made with the VLT, through narrow-band imaging. The blob has a total Lyα luminosity of ∼1043erg/s and a diameter larger than 60kpc. The available multi-wavelength data in the GOODS field consists of 13 bands from X-rays (Chandra) to infrared (Spitzer). Unlike other known Lyα blobs, this blob shows no obvious continuum counter-parts in any of the broad-bands. In particular, no optical counter-parts are found in deep HST/ACS imaging. For previously published blobs, AGN (Active Galactic Nuclei) or ``superwind'' models have been found to provide the best match to the data. We here argue that the most probable origin of the extended Lyα emission from this blob is cold accretion onto a dark matter halo.

Abstract Copyright:

Journal keyword(s): cosmology: observations - galaxies: high redshift - galaxies: halos

Nomenclature: Text: [NFM2006] Lyalpha blob N=1.

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 [NFM2006] Lyalpha blob EmO 03 32 14.60 -27 43 02.4           ~ 3 0
2 NAME GOODS Southern Field reg 03 32 28.0 -27 48 30           ~ 1194 1

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2022.07.03-00:32:08

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