TY CONF TI A sphere or a disk? Accretion of gas onto isolated stellar-mass black holes KW stars: black holes; accretion KW accretion disks; ISM: clouds JO Modern astronomy: from the Early Universe to exoplanets and black holes AU Zagorulia, D.. AU Beskin, G.. PY 2024 PB Special Astrophysical Observatory of the Russian Academy of Sciences