Bibcode
Müller, O.; Rich, R. Michael; Román, Javier; Yıldız, Mustafa K.; Bílek, Michal; Duc, Pierre-Alain; Fensch, Jérémy; Trujillo, Ignacio; Koch, Andreas
Referencia bibliográfica
Astronomy and Astrophysics, Volume 624, id.L6, 5 pp.
Fecha de publicación:
4
2019
Revista
Número de citas
35
Número de citas referidas
33
Descripción
The possible existence of two dark-matter-free galaxies (NGC 1052-DF2
and NGC 1052-DF4) in the field of the early-type galaxy NGC 1052
presents a challenge to theories of dwarf galaxy formation according to
the current cosmological paradigm. We carried out a search for
signatures of past interactions connected to the putative hosts of NGC
1052-DF2 and NGC 1052-DF4 using a very deep L-band image obtained with
the 0.7 m Jeanne Rich telescope that reach a surface brightness limit of
28.5 mag arcsec-2 in the r band. We found several low-surface
brightness features, possibly consistent with an ongoing merger history
in this group. We find a tidal interaction between NGC 1052 and NGC
1047, confirming a physical association. Furthermore, we find a stellar
loop around NGC 1052 in the direction of NGC 1042 and a stellar stream
pointing in the direction of NGC 1052-DF2, but they are not directly
connected. We find no evidence for a recent tidal interaction for NGC
1052-DF2 and NGC 1052-DF4. No LSB features have been uncovered around
the spiral galaxy NGC 1042, which leaves the association (physical or
projected) between NGC 1052 and NGC 1042 ambiguous, although they have
similar radial velocities. Their association will only be established
when accurate distances to both objects have been measured.
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