Evidence for Broad-Line Region Outflows and Their Impact on Black Hole Mass Measurements: AGN Winds in Charleston. Proceedings of a Conference held 14-21 October, 2011 at the College of Charleston, Charleston, South Carolina, USA. Edited by G. Chartas, F. Hamann, and K.M. Leighly.

K. D. Denney; R. J. Assef; K. Horne; B. M. Peterson; Marianne Vestergaard

Evidence for Broad-Line Region Outflows and Their Impact on Black Hole Mass Measurements: AGN Winds in Charleston. Proceedings of a Conference held 14-21 October, 2011 at the College of Charleston, Charleston, South Carolina, USA. Edited by G. Chartas, F. Hamann, and K.M. Leighly.

K. D. Denney, R. J. Assef, K. Horne, B. M. Peterson, Marianne Vestergaard

DARK

Abstract

Recent velocity-resolved reverberation mapping results have shown indications of possible outflowing gas from the Hß emitting region of the broad-line region (BLR) in NGC 3227 (Denney et al. 2009, 2010). We show a preliminary velocity-delay map (VDM) from these data that suggests the 2D gas motions could not be fully and accurately interpreted from the 1D velocity-resolved reverberation signal. From the VDM, an outflow component to the emission remains possible but appears to be in addition to an underlying, disk-like BLR structure consistent in size with the measured reverberation lag. The black hole (BH) mass derived from this data is therefore secure from any uncertainties possibly derived from gravitationally unbound gas contributing to the emission. Additionally, we demonstrate that BLR emission from the C IV ¿1549 broad emission line can reliably be used as a virial BH mass estimator. The presence of self-absorption, blueshifts, and asymmetries observed in C IV, and possibly connected with outflows, has raised questions in the literature regarding the reliability of using this line for mass estimates. However, our new results (Assef et al. 2011) show that C IV-based masses are in agreement with those of Hß when (1) data quality is a priority and (2) a color-correction is applied to the luminosity used to compute the mass estimates.

Original language	English
Journal	Astronomical Society of the Pacific. Conference Proceedings
Volume	460
Pages (from-to)	103
ISSN	1050-3390
Publication status	Published - 1 Aug 2012

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Denney, K. D., Assef, R. J., Horne, K., Peterson, B. M., & Vestergaard, M. (2012). Evidence for Broad-Line Region Outflows and Their Impact on Black Hole Mass Measurements: AGN Winds in Charleston. Proceedings of a Conference held 14-21 October, 2011 at the College of Charleston, Charleston, South Carolina, USA. Edited by G. Chartas, F. Hamann, and K.M. Leighly. . Astronomical Society of the Pacific. Conference Proceedings, 460, 103. http://adsabs.harvard.edu/abs/2012ASPC..460..103D

Evidence for Broad-Line Region Outflows and Their Impact on Black Hole Mass Measurements : AGN Winds in Charleston. Proceedings of a Conference held 14-21 October, 2011 at the College of Charleston, Charleston, South Carolina, USA. Edited by G. Chartas, F. Hamann, and K.M. Leighly. . / Denney, K. D.; Assef, R. J.; Horne, K. et al.

In: Astronomical Society of the Pacific. Conference Proceedings, Vol. 460, 01.08.2012, p. 103.

Research output: Contribution to journal › Journal article › Research

Denney, KD, Assef, RJ, Horne, K, Peterson, BM & Vestergaard, M 2012, 'Evidence for Broad-Line Region Outflows and Their Impact on Black Hole Mass Measurements: AGN Winds in Charleston. Proceedings of a Conference held 14-21 October, 2011 at the College of Charleston, Charleston, South Carolina, USA. Edited by G. Chartas, F. Hamann, and K.M. Leighly. ', Astronomical Society of the Pacific. Conference Proceedings, vol. 460, pp. 103. <http://adsabs.harvard.edu/abs/2012ASPC..460..103D>

Denney KD, Assef RJ, Horne K, Peterson BM, Vestergaard M. Evidence for Broad-Line Region Outflows and Their Impact on Black Hole Mass Measurements: AGN Winds in Charleston. Proceedings of a Conference held 14-21 October, 2011 at the College of Charleston, Charleston, South Carolina, USA. Edited by G. Chartas, F. Hamann, and K.M. Leighly. . Astronomical Society of the Pacific. Conference Proceedings. 2012 Aug 1;460:103.

Denney, K. D. ; Assef, R. J. ; Horne, K. et al. / Evidence for Broad-Line Region Outflows and Their Impact on Black Hole Mass Measurements : AGN Winds in Charleston. Proceedings of a Conference held 14-21 October, 2011 at the College of Charleston, Charleston, South Carolina, USA. Edited by G. Chartas, F. Hamann, and K.M. Leighly. . In: Astronomical Society of the Pacific. Conference Proceedings. 2012 ; Vol. 460. pp. 103.

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title = "Evidence for Broad-Line Region Outflows and Their Impact on Black Hole Mass Measurements: AGN Winds in Charleston. Proceedings of a Conference held 14-21 October, 2011 at the College of Charleston, Charleston, South Carolina, USA. Edited by G. Chartas, F. Hamann, and K.M. Leighly. ",

abstract = "Recent velocity-resolved reverberation mapping results have shown indications of possible outflowing gas from the H{\ss} emitting region of the broad-line region (BLR) in NGC 3227 (Denney et al. 2009, 2010). We show a preliminary velocity-delay map (VDM) from these data that suggests the 2D gas motions could not be fully and accurately interpreted from the 1D velocity-resolved reverberation signal. From the VDM, an outflow component to the emission remains possible but appears to be in addition to an underlying, disk-like BLR structure consistent in size with the measured reverberation lag. The black hole (BH) mass derived from this data is therefore secure from any uncertainties possibly derived from gravitationally unbound gas contributing to the emission. Additionally, we demonstrate that BLR emission from the C IV ¿1549 broad emission line can reliably be used as a virial BH mass estimator. The presence of self-absorption, blueshifts, and asymmetries observed in C IV, and possibly connected with outflows, has raised questions in the literature regarding the reliability of using this line for mass estimates. However, our new results (Assef et al. 2011) show that C IV-based masses are in agreement with those of H{\ss} when (1) data quality is a priority and (2) a color-correction is applied to the luminosity used to compute the mass estimates.",

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T2 - AGN Winds in Charleston. Proceedings of a Conference held 14-21 October, 2011 at the College of Charleston, Charleston, South Carolina, USA. Edited by G. Chartas, F. Hamann, and K.M. Leighly.

AU - Denney, K. D.

AU - Assef, R. J.

AU - Horne, K.

AU - Peterson, B. M.

AU - Vestergaard, Marianne

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N2 - Recent velocity-resolved reverberation mapping results have shown indications of possible outflowing gas from the Hß emitting region of the broad-line region (BLR) in NGC 3227 (Denney et al. 2009, 2010). We show a preliminary velocity-delay map (VDM) from these data that suggests the 2D gas motions could not be fully and accurately interpreted from the 1D velocity-resolved reverberation signal. From the VDM, an outflow component to the emission remains possible but appears to be in addition to an underlying, disk-like BLR structure consistent in size with the measured reverberation lag. The black hole (BH) mass derived from this data is therefore secure from any uncertainties possibly derived from gravitationally unbound gas contributing to the emission. Additionally, we demonstrate that BLR emission from the C IV ¿1549 broad emission line can reliably be used as a virial BH mass estimator. The presence of self-absorption, blueshifts, and asymmetries observed in C IV, and possibly connected with outflows, has raised questions in the literature regarding the reliability of using this line for mass estimates. However, our new results (Assef et al. 2011) show that C IV-based masses are in agreement with those of Hß when (1) data quality is a priority and (2) a color-correction is applied to the luminosity used to compute the mass estimates.

AB - Recent velocity-resolved reverberation mapping results have shown indications of possible outflowing gas from the Hß emitting region of the broad-line region (BLR) in NGC 3227 (Denney et al. 2009, 2010). We show a preliminary velocity-delay map (VDM) from these data that suggests the 2D gas motions could not be fully and accurately interpreted from the 1D velocity-resolved reverberation signal. From the VDM, an outflow component to the emission remains possible but appears to be in addition to an underlying, disk-like BLR structure consistent in size with the measured reverberation lag. The black hole (BH) mass derived from this data is therefore secure from any uncertainties possibly derived from gravitationally unbound gas contributing to the emission. Additionally, we demonstrate that BLR emission from the C IV ¿1549 broad emission line can reliably be used as a virial BH mass estimator. The presence of self-absorption, blueshifts, and asymmetries observed in C IV, and possibly connected with outflows, has raised questions in the literature regarding the reliability of using this line for mass estimates. However, our new results (Assef et al. 2011) show that C IV-based masses are in agreement with those of Hß when (1) data quality is a priority and (2) a color-correction is applied to the luminosity used to compute the mass estimates.

M3 - Journal article

SN - 1050-3390

VL - 460

SP - 103

JO - Astronomical Society of the Pacific. Conference Proceedings

JF - Astronomical Society of the Pacific. Conference Proceedings

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