FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4324330688> ?p ?o ?g. }

• W4324330688 endingPage "4543" @default.
• W4324330688 startingPage "4522" @default.
• W4324330688 abstract "ABSTRACT We investigate the properties of stars born via gravitational instability in accretion discs around supermassive black holes (SMBHs) in active galactic nuclei (AGNs), and how this varies with the SMBH mass, accretion rate, or viscosity. We show with geometrically thin, steady-state disc solutions that fragmentation results in different populations of stars when one considers the initial conditions (e.g. density and temperature of the gravitationally unstable regions). We find that opacity gaps in discs around $10^6 , {rm M}_{odot }$ SMBHs can trigger fragmentation at radii ≲ 10−2 pc, although the conditions lead to the formation of initially low stellar masses primarily at $0.1!-!0.5 , {rm M}_{odot }$. Discs around more massive SMBHs ($M_{rm BH} =10^{7-8} , {rm M}_{odot }$) form moderately massive or supermassive stars (the majority at $10^{0-2} , {rm M}_{odot }$). Using linear migration estimates, we discuss three outcomes: stars migrate till they are tidally destroyed, accreted as extreme mass ratio inspirals (EMRIs), or leftover after disc dispersal. For a single-AGN activity cycle, we find a lower limit for the EMRI rate $R_{rm emri}sim 0!-!10^{-4} , rm yr^{-1}$ per AGN assuming a star formation efficiency $epsilon =1!-!30{{ rm per cent}}$. In cases where EMRIs occur, this implies a volumetric rate up to $0.5!-!10 , rm yr^{-1}, Gpc^{-3}$ in the local Universe. The rates are particularly sensitive to model parameters for $M_{rm BH}=10^6 , {rm M}_{odot }$, for which EMRIs only occur if stars can accrete to 10s of solar masses. Our results provide further evidence that gas-embedded EMRIs can contribute a substantial fraction of events detectable by milliHz gravitational wave detectors such as the Laser Interferometer Space Antenna (LISA). Our disc solutions suggest the presence of migration traps, as has been found for more massive SMBH discs. Finally, the surviving population of stars after the disc lifetime leaves implications for stellar discs in galactic nuclei." @default.
• W4324330688 created "2023-03-16" @default.
• W4324330688 creator A5005306009 @default.
• W4324330688 creator A5039458817 @default.
• W4324330688 date "2023-03-15" @default.
• W4324330688 modified "2023-09-27" @default.
• W4324330688 title "<i>In situ</i> extreme mass ratio inspirals via subparsec formation and migration of stars in thin, gravitationally unstable AGN discs" @default.
• W4324330688 cites W1587885137 @default.
• W4324330688 cites W1617442797 @default.
• W4324330688 cites W1813160828 @default.
• W4324330688 cites W1945313318 @default.
• W4324330688 cites W1949369408 @default.
• W4324330688 cites W1964731881 @default.
• W4324330688 cites W1971050600 @default.
• W4324330688 cites W1983203491 @default.
• W4324330688 cites W1985873501 @default.
• W4324330688 cites W1988014579 @default.
• W4324330688 cites W1988030666 @default.
• W4324330688 cites W1990925621 @default.
• W4324330688 cites W1992352714 @default.
• W4324330688 cites W1995560807 @default.
• W4324330688 cites W2010218176 @default.
• W4324330688 cites W2011297915 @default.
• W4324330688 cites W2011301426 @default.
• W4324330688 cites W2013979799 @default.
• W4324330688 cites W2014299735 @default.
• W4324330688 cites W2015841141 @default.
• W4324330688 cites W2019594817 @default.
• W4324330688 cites W2019765544 @default.
• W4324330688 cites W2020028480 @default.
• W4324330688 cites W2021204304 @default.
• W4324330688 cites W2021762050 @default.
• W4324330688 cites W2026949879 @default.
• W4324330688 cites W2028041627 @default.
• W4324330688 cites W2033174427 @default.
• W4324330688 cites W2034560836 @default.
• W4324330688 cites W2035547408 @default.
• W4324330688 cites W2037345895 @default.
• W4324330688 cites W2039226225 @default.
• W4324330688 cites W2040313126 @default.
• W4324330688 cites W2040363577 @default.
• W4324330688 cites W2041685615 @default.
• W4324330688 cites W2044619143 @default.
• W4324330688 cites W2045623809 @default.
• W4324330688 cites W2048971024 @default.
• W4324330688 cites W2052280836 @default.
• W4324330688 cites W2054887670 @default.
• W4324330688 cites W2057550214 @default.
• W4324330688 cites W2059068804 @default.
• W4324330688 cites W2061341074 @default.
• W4324330688 cites W2061762764 @default.
• W4324330688 cites W2063991749 @default.
• W4324330688 cites W2064816908 @default.
• W4324330688 cites W2064887015 @default.
• W4324330688 cites W2065707066 @default.
• W4324330688 cites W2067827212 @default.
• W4324330688 cites W2068431960 @default.
• W4324330688 cites W2071738283 @default.
• W4324330688 cites W2071810769 @default.
• W4324330688 cites W2081691936 @default.
• W4324330688 cites W2081755355 @default.
• W4324330688 cites W2084110269 @default.
• W4324330688 cites W2085980049 @default.
• W4324330688 cites W2092693142 @default.
• W4324330688 cites W2095945864 @default.
• W4324330688 cites W2096594817 @default.
• W4324330688 cites W2110606875 @default.
• W4324330688 cites W2113365053 @default.
• W4324330688 cites W2114945401 @default.
• W4324330688 cites W2116466430 @default.
• W4324330688 cites W2116952160 @default.
• W4324330688 cites W2121694879 @default.
• W4324330688 cites W2124832126 @default.
• W4324330688 cites W2125682550 @default.
• W4324330688 cites W2126146135 @default.
• W4324330688 cites W2129495060 @default.
• W4324330688 cites W2130182844 @default.
• W4324330688 cites W2146292423 @default.
• W4324330688 cites W2155434402 @default.
• W4324330688 cites W2158204046 @default.
• W4324330688 cites W2159923351 @default.
• W4324330688 cites W2162551860 @default.
• W4324330688 cites W2164243168 @default.
• W4324330688 cites W2255303387 @default.
• W4324330688 cites W2273356447 @default.
• W4324330688 cites W2277474668 @default.
• W4324330688 cites W2319767023 @default.
• W4324330688 cites W2340194398 @default.
• W4324330688 cites W2527911398 @default.
• W4324330688 cites W2592013845 @default.
• W4324330688 cites W2600994601 @default.
• W4324330688 cites W2609524736 @default.
• W4324330688 cites W2620877490 @default.
• W4324330688 cites W2766188842 @default.
• W4324330688 cites W2811004927 @default.
• W4324330688 cites W2878635826 @default.
• W4324330688 cites W2883177609 @default.
• W4324330688 cites W2896257247 @default.

• next