2022A&A...663A..11L


Query : 2022A&A...663A..11L

2022A&A...663A..11L - Astronomy and Astrophysics, volume 663A, 11-11 (2022/7-1)

The MUSE eXtremely deep field: first panoramic view of an Mg II emitting intragroup medium.

LECLERCQ F., VERHAMME A., EPINAT B., SIMMONDS C., MATTHEE J., BOUCHE N.F., GAREL T., URRUTIA T., WISOTZKI L., ZABL J., BACON R., ABRIL-MELGAREJO V., BOOGAARD L., BRINCHMANN J., CANTALUPO S., CONTINI T., KERUTT J., KUSAKABE H., MASEDA M., MICHEL-DANSAC L., MUZAHID S., NANAYAKKARA T., RICHARD J. and SCHAYE J.

Abstract (from CDS):

Using the exquisite data from the MUSE eXtremely Deep Field (MXDF), we report the discovery of an MgII emission nebula with an area above a 2σ significance level of 1000 proper kpc2. This provides the first panoramic view of the spatial distribution of magnesium in the intragroup medium of a low-mass group of five star-forming galaxies at z = 1.31. The galaxy group members are separated by less than 50 physical kpc in projection and ≃120 km s–1 in velocity space. The most massive galaxy has a stellar mass of 109.35 M and shows an MgII P-Cygni line profile, indicating the presence of an outflow, which is consistent with the spatially resolved spectral analysis showing ≃+120 km s–1 shift of the MgII emission lines with respect to the systemic redshift. The other galaxies are less massive and only show MgII in emission. The detected MgII nebula has a maximal projected extent of ≃70 kpc, including a low-surface-brightness (≃2 x 10–19 erg s–1 cm–2 arcsec–2) gaseous bridge between two subgroups of galaxies. The presence of absorption features in the spectrum of a background galaxy located at an impact parameter of 19 kpc from the closest galaxy of the group indicates the presence of gas enriched in magnesium even beyond the detected nebula seen in emission, which suggests that we are observing the tip of a larger intragroup medium. The observed MgII velocity gradient suggests an overall rotation of the structure along the major axis of the most massive galaxy. Our MUSE data also reveal extended FeII* emission in the vicinity of the most massive galaxy, aligned with its minor axis and pointing towards a neighboring galaxy. Extended [OII] emission is found around the galaxy group members and at the location of the MgII bridge. Our results suggest that both tidal stripping effects from galaxy interactions and outflows are enriching the intragroup medium of this system.

Abstract Copyright: © F. Leclercq et al. 2022

Journal keyword(s): galaxies: groups: general - Galaxy: formation - galaxies: evolution - galaxies: interactions - intergalactic medium

Simbad objects: 8

goto Full paper

goto View the references in ADS

Number of rows : 8
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 [IBB2017] 8493 G 03 32 37.0 -27 46 45           ~ 1 0
2 ASPECS LP.1mm.C18 EmG 03 32 37.356 -27 46 45.38 25.2798 24.2267 23.951 23.53 23.252 ~ 47 0
3 UDF 8930 G 03 32 37.503 -27 46 45.38 26.4583 26.5062 26.75     ~ 12 0
4 Anon J033237-2746 EmG 03 32 37.565 -27 46 46.78 26.0985 25.8334 25.82   25.4872 ~ 21 1
5 GOODS-MUSIC 10887 G 03 32 37.646 -27 46 41.82 26.8677 26.6561 26.69     ~ 12 0
6 FIGS GS1 1552 EmG 03 32 37.729 -27 46 42.68 24.8646 24.6520 24.602   24.4677 ~ 26 0
7 NAME Hubble Ultra Deep Field reg 03 32 39.0 -27 47 29           ~ 1661 0
8 M 81 Sy2 09 55 33.1726556496 +69 03 55.062505368   7.89 6.94     ~ 4441 3

To bookmark this query, right click on this link: simbad:objects in 2022A&A...663A..11L and select 'bookmark this link' or equivalent in the popup menu