2020A&A...641A..32H


C.D.S. - SIMBAD4 rel 1.7 - 2020.11.28CET22:20:54

2020A&A...641A..32H - Astronomy and Astrophysics, volume 641A, 32-32 (2020/9-1)

A Lyα nebula at z ∼ 3.3.

HIBON P., TANG F. and THOMAS R.

Abstract (from CDS):


Context. Searching for high-redshift galaxies is a field of intense activity in modern observational cosmology that will continue to grow with future ground-based and sky observatories. Over the last few years, a lot has been learned about the high-z Universe.
Aims. Despite extensive Lyα blobs (LAB) surveys from low to high redshifts, giant LABs over 100 kpc have been found mostly at z∼2-4. This redshift range is coincident with the transition epoch of galactic gas-circulation processes from inflows to outflows at z∼2.5-3. This suggests that the formation of giant LABs may be related to a combination of gas inflows and outflows. Their extreme youth makes them interesting objects in the study of galaxy formation as they provide insight into some of the youngest known highly star forming galaxies, with only modest time investments using ground-based telescopes.
Methods. Systematic narrow-band Lyα nebula surveys are ongoing, but they are limited in their covered redshift range and their comoving volume. This poses a significant problem when searching for such rare sources. To address this problem, we developed a systematic searching tool, ATACAMA (A Tool for seArChing for lArge LyMan Alpha nebulae) designed to find large Lyα nebulae at any redshift within deep multi-wavelength broad-band imaging.
Results. We identified a Lyα nebula candidate at zphot∼3.3 covering an isophotal area of 29.4arcsec2. Its morphology shows a bright core and a faint core which coincides with the morphology of previously known Lyα blobs. A first estimation of the Lyα equivalent width and line flux agree with the values from the study led by several groups.

Abstract Copyright: © ESO 2020

Journal keyword(s): methods: observational - galaxies: evolution - galaxies: high-redshift

Status at CDS : Examining the need for a new acronym.

Simbad objects: 12

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Number of rows : 12

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 NAME Himiko EmG 02 17 57.6122 -05 08 44.898           ~ 89 0
2 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1320 0
3 NVSS J090530+340756 rG 09 05 30.1 +34 07 57   24.0 23.800 23.500   ~ 151 1
4 NAME COSMOS Field reg 10 00 28.60 +02 12 21.0           ~ 2142 0
5 [MPV2019] HLock01-LAB EmO 10 57 49.74 +57 30 15.0           ~ 2 0
6 [DBC2004] M03 rG 13 38 26.05 -19 42 30.5       22.4   ~ 90 0
7 [YZT2009] Blob 7 EmO 14 30 13.0 +35 37 45           ~ 2 0
8 [YZT2009] Blob 6 EmO 14 30 50.2 +35 41 03           ~ 2 0
9 [YZT2009] Blob 5 EmO 14 32 17.7 +35 47 53           ~ 2 0
10 NAME MAMMOTH-1 EmO 14 41 24.310 +40 03 11.91           ~ 12 0
11 NAME SMM J221726+0013 EmO 22 17 25.97 +00 12 38.9   27   24.49   ~ 94 0
12 NAME SSA22 Protocluster ClG 22 17 34.0 +00 17 01           ~ 96 0

    Equat.    Gal    SGal    Ecl

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2020.11.28-22:20:54

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