Luminous [Oiii] and [Nii] from tidally disrupted horizontal branch stars

Drew Clausen; Steinn Sigurdsson; Michael Eracleous; Jimmy A. Irwin

doi:10.1111/j.1365-2966.2012.21305.x

Luminous [Oiii] and [Nii] from tidally disrupted horizontal branch stars

Drew Clausen, Steinn Sigurdsson, Michael Eracleous, Jimmy A. Irwin

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18 Scopus citations

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 [Nii] λλ6548, 6583 and [Oiii] λλ4959, 5007. Models of a red clump HB star undergoing mild disruption by a massive (50-100 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.

Original language	English (US)
Pages (from-to)	1268-1274
Number of pages	7
Journal	Monthly Notices of the Royal Astronomical Society
Volume	424
Issue number	2
DOIs	https://doi.org/10.1111/j.1365-2966.2012.21305.x
State	Published - Aug 2012

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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10.1111/j.1365-2966.2012.21305.x

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title = "Luminous [Oiii] and [Nii] from tidally disrupted horizontal branch stars",

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 [Nii] λλ6548, 6583 and [Oiii] λλ4959, 5007. Models of a red clump HB star undergoing mild disruption by a massive (50-100 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.",

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T1 - Luminous [Oiii] and [Nii] from tidally disrupted horizontal branch stars

AU - Clausen, Drew

AU - Sigurdsson, Steinn

AU - Eracleous, Michael

AU - Irwin, Jimmy A.

PY - 2012/8

Y1 - 2012/8

N2 - 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 [Nii] λλ6548, 6583 and [Oiii] λλ4959, 5007. Models of a red clump HB star undergoing mild disruption by a massive (50-100 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.

AB - 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 [Nii] λλ6548, 6583 and [Oiii] λλ4959, 5007. Models of a red clump HB star undergoing mild disruption by a massive (50-100 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.

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Luminous [Oiii] and [Nii] from tidally disrupted horizontal branch stars

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