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  • We explore the conditions for thermal instability to operate in the mini-spiral region of the Galactic Centre (Sgr A*), where both hot and cold media are known to coexist. The photoionization Cloudy calculations are performed for different physical states of plasma.We neglect the dynamics of the material and concentrate on studying the parameter ranges where thermal instability may operate, taking into account the past history of Sgr A*’s bolometric luminosity. We show that thermal instability does not operate at the present very low level of Sgr A* activity. The instability enhances the clumpiness of the mini-spiral medium and creates the possibility for episodes of enhanced accretion of cold clumps towards Sgr A*. The mechanism determines the range of masses and sizes of clouds; under the conditions of Sgr A*, the likely values are 1–102 M-circle for the cloud’s typical mass.
  • We explore the conditions for thermal instability to operate in the mini-spiral region of the Galactic Centre (Sgr A*), where both hot and cold media are known to coexist. The photoionization Cloudy calculations are performed for different physical states of plasma.We neglect the dynamics of the material and concentrate on studying the parameter ranges where thermal instability may operate, taking into account the past history of Sgr A*’s bolometric luminosity. We show that thermal instability does not operate at the present very low level of Sgr A* activity. The instability enhances the clumpiness of the mini-spiral medium and creates the possibility for episodes of enhanced accretion of cold clumps towards Sgr A*. The mechanism determines the range of masses and sizes of clouds; under the conditions of Sgr A*, the likely values are 1–102 M-circle for the cloud’s typical mass. (en)
Title
  • Conditions for thermal instability in the Galactic Centre mini-spiral region
  • Conditions for thermal instability in the Galactic Centre mini-spiral region (en)
skos:prefLabel
  • Conditions for thermal instability in the Galactic Centre mini-spiral region
  • Conditions for thermal instability in the Galactic Centre mini-spiral region (en)
skos:notation
  • RIV/67985815:_____/14:00434721!RIV15-GA0-67985815
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • I, P(GC13-00070J), P(LH14049)
http://linked.open...iv/cisloPeriodika
  • 4
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 8584
http://linked.open...ai/riv/idVysledku
  • RIV/67985815:_____/14:00434721
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • black holes; accretion discs; galactic centre (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • GB - Spojené království Velké Británie a Severního Irska
http://linked.open...ontrolniKodProRIV
  • [9369DF90BCFA]
http://linked.open...i/riv/nazevZdroje
  • Monthly Notices of the Royal Astronomical Society
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http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...vavai/riv/projekt
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 445
http://linked.open...iv/tvurceVysledku
  • Karas, Vladimír
  • Kunneriath, Devaky
  • Czerny, B.
  • Rózanska, A.
  • Adhikari, T. P.
  • Moscibrodzka, M.
http://linked.open...ain/vavai/riv/wos
  • 000346963300083
issn
  • 0035-8711
number of pages
http://bibframe.org/vocab/doi
  • 10.1093/mnras/stu2066
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