H i study of the environment around ESO 243โ49, the host galaxy of an intermediate-mass black hole
H i study of the environment around ESO 243โ49, the host galaxy of an intermediate-mass black hole
The lenticular galaxy ESO 243-49 hosts the ultraluminous X-ray source HLX-1, the best candidate intermediate mass black hole (IMBH) currently known. The environments of IMBHs remain unknown, however the proposed candidates include the nuclei of dwarf galaxies or globular clusters. Evidence at optical wavelengths points at HLX-1 being the remnant โฆ