Luminous [O iii] and [N ii] from tidally disrupted horizontal branch stars
Loading...
Date
2012
Journal Title
Journal ISSN
Volume Title
Publisher
Wiley-Blackwell
Abstract
We model the emission lines generated in the photoionized debris of a tidally disrupted horizontal branch (HB) star. We find that at late times, the brightest optical emission lines are [N ii] ??6548, 6583 and [O iii] ??4959, 5007. Models of a red clump HB star undergoing mild disruption by a massive (50100 M?) black hole (BH) yield an emission-line spectrum that is in good agreement with that observed in the NGC 1399 globular cluster hosting the ultraluminous X-ray source CXOJ033831.8-352604. We make predictions for the ultraviolet emission-line spectrum that can verify the tidal disruption scenario and constrain the mass of the BH.
Description
Keywords
black hole physics, globular clusters: general, galaxies: individual: NGC 1399, MASSIVE BLACK-HOLES, EXTRAGALACTIC GLOBULAR-CLUSTER, X-RAY BINARIES, EMISSION-LINES, HALO CLUSTERS, GIANT BRANCH, NGC 4472, RZ 2109, GALAXY, PHOTOMETRY, Astronomy & Astrophysics
Citation
Clausen, D., Sigurdsson, S., Eracleous, M., Irwin, J. (2012): Luminous [O III] and [N II]
from Tidally Disrupted Horizontal Branch Stars. Monthly Notices of the Royal
Astronomical Society, 424(2). DOI: https://doi.org/10.1111/j.1365-2966.2012.21305.x