Search

Your search keyword '"F. MacInnis"' showing total 9 results
Start Over Author "F. MacInnis" Topic astrophysics - astrophysics of galaxies
9 results on '"F. MacInnis"'

1. Space Telescope and Optical Reverberation Mapping Project. IX. Velocity–Delay Maps for Broad Emission Lines in NGC 5548

Author

B. J. Shappee, J. M. Gelbord, Alessandro Siviero, Marianne Vestergaard, M. Spencer, G. A. Borman, Kevin V. Croxall, Michael Fausnaugh, Rick Edelson, M. C. Bottorff, Yair Krongold, Jeremy Jones, A. Skielboe, Nicolas Tejos, T. Hutchison, F. MacInnis, J. E. Brown, Catherine J. Grier, Hyun-Il Sung, M. L. Nguyen, Ryan Norris, Alis J. Deason, Haojing Yan, Susanna Bisogni, D. M. Crenshaw, J. A. Kennea, Alexei V. Filippenko, P. Ochner, S. V. Nazarov, A. A. Breeveld, Keith Horne, I. M. McHardy, Y. Weiss, E. Holmbeck, Wei Zhu, Michael T. Carini, J. A. Nousek, Hagai Netzer, A. Bigley, S. Hicks, Michael D. Joner, Kirk T. Korista, S. A. Klimanov, S. C. Kim, G. De Rosa, Jon C. Mauerhan, E. R. Manne-Nicholas, J. van Saders, Isaac Shivvers, Aaron J. Barth, Christopher S. Kochanek, Vardha N. Bennert, Ying Zu, Sang Chul Kim, Kelly D. Denney, Scott M. Adams, S. G. Sergeev, L. Gonzalez, F. Müller Sánchez, H. Yuk, Steven Villanueva, N. Gehrels, J. J. Jensen, R. McGurk, M. Im, Miao Li, K. Flatland, Garrett Somers, Jamie Tayar, D. Mudd, S. Geier, Enrico Maria Corsini, Phil Uttley, S. Rafter, M. Eracleous, H. W. Rix, Lorenzo Morelli, Douglas C. Leonard, Kelsey I. Clubb, Laura Vican, K. Schnülle, Smita Mathur, C. S. Turner, J. R. Parks, J.-U. Pott, M. Dietrich, Patrick L. Kelly, Jenny E. Greene, Carolin Villforth, P. Arévalo, Calen B. Henderson, Michael S. Brotherton, A. Gupta, M. W. Lau, Julia M. Comerford, Chris Done, Minjin Kim, Ori D. Fox, Gerard A. Kriss, Gary J. Ferland, Daniel Proga, S. Young, N. V. Efimova, Thomas W.-S. Holoien, P. A. Evans, Radosław Poleski, M. R. Goad, Dirk Grupe, B. Scott, Alessandro Pizzella, Zhiyuan Ma, J. S. Schimoia, J. C. Lee, Jong-Hak Woo, P. Lira, Cassandra Lochhaas, Jessie C. Runnoe, M. H. Siegel, Justin Ely, Patrick B. Hall, I. E. Papadakis, C. A. Johnson, Tommaso Treu, Emma Gardner, Todd Boroson, D. A. Starkey, Daniel J. Stevens, Thomas G. Beatty, Andrew J. King, Jelle Kaastra, Edward M. Cackett, Misty C. Bentz, J. S. Brown, Liuyi Pei, D. N. Okhmat, Steve Croft, M. A. Malkan, G. V. Simonian, M. Dehghanian, C. Montuori, Bradley M. Peterson, E. Dalla Bontà, R. W. Pogge, Matthew T. Penny, V. Gorjian, W. N. Brandt, Elinor L. Gates, Shai Kaspi, D. A. Saylor, Ana M. Mosquera, A. Pancoast, WeiKang Zheng, A. de Lorenzo-Cáceres, Gabriela Canalizo, ITA, USA, GBR, Science & Technology Facilities Council, University of St Andrews. School of Physics and Astronomy, and University of St Andrews. St Andrews Centre for Exoplanet Science

Subjects
Seyfert [Galaxies], Active galactic nucleus, active [Galaxies], 010504 meteorology & atmospheric sciences, individual (NGC 5548) [Galaxies], Active galaxies, Astrophysical black holes, Supermassive black holes, Active galactic nuclei, Reverberation mapping, astro-ph.GA, T-NDAS, FOS: Physical sciences, Astrophysics, Astronomy & Astrophysics, 01 natural sciences, Atomic, Physical Chemistry, Virial theorem, Reverberation mapping, Particle and Plasma Physics, Spitzer Space Telescope, Supermassive black holes, 0103 physical sciences, QB Astronomy, Nuclear, Emission spectrum, 010303 astronomy & astrophysics, QC, QB, 0105 earth and related environmental sciences, Line (formation), Physics, Active galactic nuclei, Supermassive black hole, Astrophysical black holes, Molecular, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Black hole, QC Physics, Space and Planetary Science, nuclei [Galaxies], Astrophysics of Galaxies (astro-ph.GA), Active galaxies, Astronomical and Space Sciences, Physical Chemistry (incl. Structural)
Abstract

We report velocity-delay maps for prominent broad emission lines, Ly_alpha, CIV, HeII and H_beta, in the spectrum of NGC5548. The emission-line responses inhabit the interior of a virial envelope. The velocity-delay maps reveal stratified ionization structure. The HeII response inside 5-10 light-days has a broad single-peaked velocity profile. The Ly_alpha, CIV, and H_beta responses peak inside 10 light-days, extend outside 20 light-days, and exhibit a velocity profile with two peaks separated by 5000 km/s in the 10 to 20 light-day delay range. The velocity-delay maps show that the M-shaped lag vs velocity structure found in previous cross-correlation analysis is the signature of a Keplerian disk with a well-defined outer edge at R=20 light-days. The outer wings of the M arise from the virial envelope, and the U-shaped interior of the M is the lower half of an ellipse in the velocity-delay plane. The far-side response is weaker than that from the near side, so that we see clearly the lower half, but only faintly the upper half, of the velocity--delay ellipse. The delay tau=(R/c)(1-sin(i))=5 light-days at line center is from the near edge of the inclined ring, giving the inclination i=45 deg. A black hole mass of M=7x10^7 Msun is consistent with the velocity-delay structure. A barber-pole pattern with stripes moving from red to blue across the CIV and possibly Ly_alpha line profiles suggests the presence of azimuthal structure rotating around the far side of the broad-line region and may be the signature of precession or orbital motion of structures in the inner disk. Further HST observations of NGC 5548 over a multi-year timespan but with a cadence of perhaps 10 days rather than 1 day could help to clarify the nature of this new AGN phenomenon., 19 pages, 9 figures, ApJ in press

Published
2021

2. Space Telescope and Optical Reverberation Mapping Project. XII: Broad-line Region Modeling of NGC 5548

Author

Christopher S. Kochanek, T. Hutchison, H. W. Rix, Gary J. Ferland, Alessandro Pizzella, E. Holmbeck, E. R. Manne-Nicholas, Ori D. Fox, Radosław Poleski, I. E. Papadakis, Erin Kara, S. Young, Vardha N. Bennert, Kelly D. Denney, Daniel J. Stevens, M. Dietrich, Calen B. Henderson, WeiKang Zheng, Haojing Yan, Aaron J. Barth, P. Lira, M. C. Bottorff, Steve Croft, Jelle Kaastra, Jamie Tayar, Misty C. Bentz, Zhiyuan Ma, Laura Vican, Jenny E. Greene, J. S. Brown, M. W. Lau, F. Müller-Sánchez, Alexei V. Filippenko, Dirk Grupe, Daniel Proga, R. McGurk, Alis J. Deason, I. M. McHardy, K. Flatland, Matthew A. Malkan, Michael D. Joner, Douglas C. Leonard, Kelsey I. Clubb, Missagh Mehdipour, B. J. Shappee, Kevin V. Croxall, J. M. Gelbord, M. H. Siegel, Jon C. Mauerhan, Ying Zu, Patrick L. Kelly, Christian Knigge, Myungshin Im, Peter R. Williams, C. A. Johnson, S. V. Nazarov, J. A. Nousek, Miao Li, C. S. Turner, Andrew J. King, Marianne Vestergaard, S. C. Kim, G. De Rosa, J. R. Parks, M. Spencer, S. G. Sergeev, Steven Villanueva, Matthew T. Penny, Lorenzo Morelli, Jong-Hak Woo, D. Mudd, D. M. Crenshaw, J.-U. Pott, T. W. S. Holoien, A. A. Breeveld, D. N. Okhmat, Scott M. Adams, Carolin Villforth, Sang Chul Kim, V. Gorjian, W. N. Brandt, G. V. Simonian, Elinor L. Gates, Shai Kaspi, M. Dehghanian, D. A. Saylor, Hyun-Il Sung, Simon Vaughan, Isaac Shivvers, F. MacInnis, Minjin Kim, Edward M. Cackett, Liuyi Pei, Alessandro Siviero, Cassandra Lochhaas, Patrick B. Hall, Wei Zhu, Tommaso Treu, Thomas G. Beatty, Tim Waters, B. Scott, J. C. Lee, Jeremy Jones, M. L. Nguyen, Ryan Norris, Susanna Bisogni, Justin Ely, Keith Horne, A. Gupta, L. Gonzalez, J. J. Jensen, P. Arévalo, N. Gehrels, Catherine J. Grier, S. Geier, Enrico Maria Corsini, S. E. Rafter, P. Ochner, Y. Weiss, A. Skielboe, Michael T. Carini, Michael S. Brotherton, H. Yuk, Chris Done, Gerard A. Kriss, C. Montuori, Bradley M. Peterson, E. Dalla Bontà, Emma Gardner, D. A. Starkey, R. W. Pogge, Smita Mathur, J. A. Kennea, P. A. Evans, A. Bigley, Jessie C. Runnoe, S. Hicks, S. A. Klimanov, Todd Boroson, J. van Saders, J. S. Schimoia, Garrett Somers, Phil Uttley, Nahum Arav, G. A. Borman, J. E. Brown, Nicolas Tejos, Julia M. Comerford, A. de Lorenzo-Cáceres, Gabriela Canalizo, Ana M. Mosquera, A. Pancoast, Michael Fausnaugh, Rick Edelson, N. V. Efimova, Brendon J. Brewer, Yair Krongold, High Energy Astrophys. & Astropart. Phys (API, FNWI), University of St Andrews. School of Physics and Astronomy, University of St Andrews. St Andrews Centre for Exoplanet Science, ITA, USA, and GBR

Subjects
010504 meteorology & atmospheric sciences, Active galaxies, Active galactic nuclei, Reverberation mapping, Seyfert galaxies, Astrophysics, 01 natural sciences, Atomic, Particle and Plasma Physics, Reverberation mapping, Spitzer Space Telescope, Emission spectrum, 010303 astronomy & astrophysics, QC, Physics, Seyfert galaxies, Balmer series, 3rd-DAS, VARIABILITY, Reverbation mapping, AGN MONITORING PROJECT, symbols, STEPS, Astronomical and Space Sciences, Physical Chemistry (incl. Structural), Active galactic nucleus, astro-ph.GA, Astrophysics::High Energy Astrophysical Phenomena, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astronomy & Astrophysics, Electromagnetic radiation, symbols.namesake, SUPERMASSIVE BLACK-HOLES, 0103 physical sciences, Nuclear, MASSES, Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences, Active galactic nuclei, Molecular, Astronomy and Astrophysics, Light curve, Astrophysics - Astrophysics of Galaxies, Black hole, CONTINUUM, SIZE, QC Physics, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Active galaxies, EMISSION
Abstract

We present geometric and dynamical modeling of the broad line region for the multi-wavelength reverberation mapping campaign focused on NGC 5548 in 2014. The dataset includes photometric and spectroscopic monitoring in the optical and ultraviolet, covering the H$\beta$, C IV, and Ly$\alpha$ broad emission lines. We find an extended disk-like H$\beta$ BLR with a mixture of near-circular and outflowing gas trajectories, while the C IV and Ly$\alpha$ BLRs are much less extended and resemble shell-like structures. There is clear radial structure in the BLR, with C IV and Ly$\alpha$ emission arising at smaller radii than the H$\beta$ emission. Using the three lines, we make three independent black hole mass measurements, all of which are consistent. Combining these results gives a joint inference of $\log_{10}(M_{\rm BH}/M_\odot) = 7.64^{+0.21}_{-0.18}$. We examine the effect of using the $V$ band instead of the UV continuum light curve on the results and find a size difference that is consistent with the measured UV-optical time lag, but the other structural and kinematic parameters remain unchanged, suggesting that the $V$ band is a suitable proxy for the ionizing continuum when exploring the BLR structure and kinematics. Finally, we compare the H$\beta$ results to similar models of data obtained in 2008 when the AGN was at a lower luminosity state. We find that the size of the emitting region increased during this time period, but the geometry and black hole mass remain unchanged, which confirms that the BLR kinematics suitably gauge the gravitational field of the central black hole., Comment: 26 pages, 19 figures, 1 table, accepted for publication in ApJ

Published
2020

3. Space Telescope and Optical Reverberation Mapping Project. VIII. Time Variability of Emission and Absorption in NGC 5548 Based on Modeling the Ultraviolet Spectrum

Author

Andrew J. King, K. G. Teems, Gabriele Ponti, J. S. Schimoia, Calen B. Henderson, Michael S. Brotherton, S. Paltani, Nahum Arav, Alessandro Siviero, Radosław Poleski, P. Lira, Sang Chul Kim, Thomas W.-S. Holoien, Wei Zhu, A. de Lorenzo-Cáceres, M. C. Bottorff, Dirk Grupe, Gabriela Canalizo, M. Eracleous, S. G. Sergeev, F. MacInnis, Massimo Cappi, M. Dietrich, Alis J. Deason, Haojing Yan, Giorgio Matt, Ciro Pinto, Michael T. Carini, Minjin Kim, Brandon C. Kelly, I. M. McHardy, Scott M. Adams, L. Gonzalez, J. J. Jensen, Julia M. Comerford, Yair Krongold, Tim Waters, B. Scott, C. S. Turner, G. A. Borman, R. McGurk, Nicolas Tejos, J. R. Parks, K. Flatland, Michael D. Joner, Kirk T. Korista, L. Di Gesu, Emma Gardner, Jon C. Mauerhan, Jessie C. Runnoe, Douglas C. Leonard, Kelsey I. Clubb, M. H. Siegel, C. A. Johnson, D. A. Starkey, H. Yuk, M. A. Malkan, Justin Ely, Ying Zu, Aaron J. Barth, Cassandra Lochhaas, Patrick L. Kelly, E. Holmbeck, Hyun-Il Sung, Patrick B. Hall, C. Montuori, Christopher S. Kochanek, Bradley M. Peterson, Tommaso Treu, Missagh Mehdipour, Marie Wingyee Lau, A. Skielboe, Catherine J. Grier, J. A. Kennea, Thomas G. Beatty, R. W. Pogge, J. van Saders, A. Bigley, S. Hicks, Catia Silva, H. W. Rix, Vardha N. Bennert, D. M. Crenshaw, E. Dalla Bontà, Miao Li, A. A. Breeveld, Dom Walton, D. N. Okhmat, Elisa Costantini, P. Ochner, Y. Weiss, M. L. Nguyen, Ryan Norris, Susanna Bisogni, Ehud Behar, Jacobo Ebrero, Garrett Somers, Phil Uttley, S. Rafter, Kelly D. Denney, K. Schnülle, Carolin Villforth, Keith Horne, Smita Mathur, G. V. Simonian, R. Boissay-Malaquin, Gary J. Ferland, J. S. Brown, Jelle Kaastra, Ana M. Mosquera, Stefano Bianchi, Misty C. Bentz, A. Pancoast, Alessandro Pizzella, WeiKang Zheng, N. Gehrels, Daniel J. Stevens, M. Dehghanian, Kevin V. Croxall, Isaac Shivvers, A. Gupta, Chris Done, J. E. Brown, B. De Marco, Gerard A. Kriss, Steve Croft, S. V. Nazarov, J. A. Nousek, Jae-Ok Lee, P. Arévalo, G. De Rosa, Michael Fausnaugh, Rick Edelson, Phil Evans, Lorenzo Morelli, S. Geier, Enrico Maria Corsini, M. R. Goad, V. Gorjian, W. N. Brandt, Elinor L. Gates, Shai Kaspi, D. A. Saylor, Jong-Hak Woo, Edward M. Cackett, Liuyi Pei, T. Hutchison, Jamie Tayar, E. R. Manne-Nicholas, Laura Vican, Daniel Proga, Steven Villanueva, D. Mudd, J.-U. Pott, F. Müller-Sánchez, Alexei V. Filippenko, Hagai Netzer, S. A. Klimanov, B. J. Shappee, J. M. Gelbord, Marianne Vestergaard, M. Spencer, Zhiyuan Ma, Carl T. Coker, S. Y. Kim, Myungshin Im, Science & Technology Facilities Council, University of St Andrews. School of Physics and Astronomy, University of St Andrews. St Andrews Centre for Exoplanet Science, High Energy Astrophys. & Astropart. Phys (API, FNWI), Kriss, G. A., De Rosa, G., Ely, J., Peterson, B. M., Kaastra, J., Mehdipour, M., Ferland, G. J., Dehghanian, M., Mathur, S., Edelson, R., Korista, K. T., Arav, N., Barth, A. J., Bentz, M. C., Brandt, W. N., Crenshaw, D. M., Bontà, E. Dalla, Denney, K. D., Done, C., Eracleous, M., Fausnaugh, M. M., Gardner, E., Goad, M. R., Grier, C. J., Horne, Keith, Kochanek, C. S., Mchardy, I. M., Netzer, H., Pancoast, A., Pei, L., Pogge, R. W., Proga, D., Silva, C., Tejos, N., Vestergaard, M., Adams, S. M., Anderson, M. D., Arévalo, P., Beatty, T G., Behar, E., Bennert, V. N., Bianchi, S., Bigley, A., Bisogni, S., Boissay-Malaquin, R., Borman, G. A., Bottorff, M. C., Breeveld, A. A., Brotherton, M., Brown, J. E., Brown, J. S., Cackett, E. M., Canalizo, G., Cappi, M., Carini, M. T., Clubb, K. I., Comerford, J. M., Coker, C. T., Corsini, E. M., Costantini, E., Croft, S., Croxall, K. V., Deason, A. J., De Lorenzo-Cáceres, A., De Marco, B., Dietrich, M., Di Gesu, L., Ebrero, J., Evans, P. A., Filippenko, A. V., Flatland, K., Gates, E. L., Gehrels, N., Geier, S., Gelbord, J. M., Gonzalez, L., Gorjian, V., Grupe, D., Gupta, A., Hall, P. B., Henderson, C. B., Hicks, S., Holmbeck, E., Holoien, T. W. -S., Hutchison, T. A., Im, M., Jensen, J. J., Johnson, C. A., Joner, M. D., Kaspi, S., Kelly, B. C., Kelly, P. L., Kennea, J. A., Kim, M., Kim, S. C., Kim, S. Y., King, A., Klimanov, S. A., Krongold, Y., Lau, M. W., Lee, J. C., Leonard, D. C., Li, Miao, Lira, P., Lochhaas, C., Ma, Zhiyuan, Macinnis, F., Malkan, M. A., Manne-Nicholas, E. R., Matt, G., Mauerhan, J. C., Mcgurk, R., Montuori, C., Morelli, L., Mosquera, A., Mudd, D., Müller-Sánchez, F., Nazarov, S. V., Norris, R. P., Nousek, J. A., Nguyen, M. L., Ochner, P., Okhmat, D. N., Paltani, S., Parks, J. R., Pinto, C., Pizzella, A., Poleski, R., Ponti, G., Pott, J. -U., Rafter, S. E., Rix, H. -W., Runnoe, J., Saylor, D. A., Schimoia, J. S., Schnülle, K., Scott, B., Sergeev, S. G., Shappee, B. J., Shivvers, I., Siegel, M., Simonian, G. V., Siviero, A., Skielboe, A., Somers, G., Spencer, M., Starkey, D., Stevens, D. J., Sung, H. -I., Tayar, J., Teems, K. G., Treu, T., Turner, C. S., Uttley, P., Van Saders, J ., Vican, L., Villforth, C., Villanueva Jr., S., Walton, D. J., Waters, T., Weiss, Y., Woo, J. -H., Yan, H., Yuk, H., Zheng, W., Zhu, W., Zu, Y., and USA

Subjects
Seyfert [Galaxies], galaxies: active, galaxies: individual (NGC 5548), galaxies: nuclei, galaxies: Seyfert, 010504 meteorology & atmospheric sciences, Absorption spectroscopy, active [Galaxies], individual (NGC 5548) [Galaxies], Astrophysics::High Energy Astrophysical Phenomena, Continuum (design consultancy), FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Spectral line, Luminosity, 0103 physical sciences, QB Astronomy, Emission spectrum, Absorption (electromagnetic radiation), 010303 astronomy & astrophysics, QC, Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences, QB, Physics, Astronomy and Astrophysics, DAS, Astrophysics - Astrophysics of Galaxies, Galaxy, QC Physics, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), nuclei [Galaxies], Reverberation mapping
Abstract

We model the ultraviolet spectra of the Seyfert 1 galaxy NGC~5548 obtained with the Hubble Space Telescope during the 6-month reverberation-mapping campaign in 2014. Our model of the emission from NGC 5548 corrects for overlying absorption and deblends the individual emission lines. Using the modeled spectra, we measure the response to continuum variations for the deblended and absorption-corrected individual broad emission lines, the velocity-dependent profiles of Ly$\alpha$ and C IV, and the narrow and broad intrinsic absorption features. We find that the time lags for the corrected emission lines are comparable to those for the original data. The velocity-binned lag profiles of Ly$\alpha$ and C IV have a double-peaked structure indicative of a truncated Keplerian disk. The narrow absorption lines show delayed response to continuum variations corresponding to recombination in gas with a density of $\sim 10^5~\rm cm^{-3}$. The high-ionization narrow absorption lines decorrelate from continuum variations during the same period as the broad emission lines. Analyzing the response of these absorption lines during this period shows that the ionizing flux is diminished in strength relative to the far-ultraviolet continuum. The broad absorption lines associated with the X-ray obscurer decrease in strength during this same time interval. The appearance of X-ray obscuration in $\sim\,2012$ corresponds with an increase in the luminosity of NGC 5548 following an extended low state. We suggest that the obscurer is a disk wind triggered by the brightening of NGC 5548 following the decrease in size of the broad-line region during the preceding low-luminosity state., Comment: 50 pages, 30 figures, uses aastex62.cls. Accepted for publication in ApJ, 07/06/2019. High-level products page in MAST will go live after 7/15/2019. Replaced Figure 4 on 7/12/2019 to be more red/green color-blind friendly

Published
2019

4. Velocity-resolved Reverberation Mapping of Five Bright Seyfert 1 Galaxies

Author

S. M. McGraw, G. A. Borman, E. Kilerci-Eser, D. N. Okhmat, Jessie C. Runnoe, Jan Skowron, E. Tamajo, D. A. Starkey, G. V. Simonian, Michael S. Brotherton, Radosław Poleski, J. van Saders, Cassandra Lochhaas, J. S. Brown, Christopher A. Onken, Sarah Eftekharzadeh, M. C. Bottorff, R. Stoll, E. Portaluri, A. L. King, Alessandro Siviero, Stefano Valenti, Christopher S. Kochanek, Joseph Moody, C. D. Laney, Miao Li, Encarni Romero-Colmenero, Adrian M. Price-Whelan, Kevin V. Croxall, Wei Zhu, G. De Rosa, E. R. Manne-Nicholas, J. L. Prieto, N. G. Pulatova, Misty C. Bentz, Carolin Villforth, Marianne Vestergaard, C. Araya Salvo, J. E. Brown, R. Musso, M. L. Nguyen, Joseph M. Antognini, Christian Clanton, Hartmut Winkler, Keith Horne, Scott M. Adams, Benjamin J. Shappee, Michael D. Joner, K. Mogren, Eve Armstrong, F. MacInnis, Catherine J. Grier, M. Spencer, S. L. Fiorenza, Ying Zu, P. Ochner, Rachael M. Roettenbacher, Stefano Ciroi, Thomas G. Beatty, Bradley M. Peterson, Stacy Y. Kim, Daniel J. Stevens, Steven Villanueva, Aaron J. Barth, Ana M. Mosquera, D. Mudd, A. Pancoast, E. Dalla Bontà, Todd Boroson, J. Zastrow, Garrett Somers, D. M. Skowron, Kelly D. Denney, S. Rafter, J. S. Schimoia, N. Sherf, Mike Eracleous, B. Ou-Yang, J. Kellar, T. Hutchison, Liuyi Pei, Calen B. Henderson, Thomas W.-S. Holoien, A. Frassati, S. G. Sergeev, Jamie Tayar, Valentina Cracco, Zhiyuan Ma, C. Montouri, Carl T. Coker, M. Mason, Jaehan Bae, Michael Fausnaugh, Matthew T. Penny, Shai Kaspi, Richard W. Pogge, A. Bhattacharjee, G. La Mura, Y. Weiss, Keith Hawkins, S. V. Nazarov, Steven M. Crawford, ITA, USA, GBR, FRA, DEU, ESP, Science & Technology Facilities Council, University of St Andrews. School of Physics and Astronomy, and University of St Andrews. St Andrews Centre for Exoplanet Science

Subjects
Seyfert [Galaxies], Reverberation, Time delays, active [Galaxies], 010504 meteorology & atmospheric sciences, galaxies: active, FOS: Physical sciences, Kinematics, Astrophysics, 01 natural sciences, 0103 physical sciences, QB Astronomy, galaxies: nuclei, galaxies: Seyfert, 010303 astronomy & astrophysics, QC, QB, 0105 earth and related environmental sciences, Physics, Observational error, Astronomy and Astrophysics, 3rd-DAS, Astrophysics - Astrophysics of Galaxies, Galaxy, Black hole, galaxies: active, galaxies: nuclei, galaxies: Seyfert, QC Physics, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), nuclei [Galaxies], Reverberation mapping
Abstract

We present the first results from a reverberation-mapping campaign undertaken during the first half of 2012, with additional data on one AGN (NGC 3227) from a 2014 campaign. Our main goals are (1) to determine the black hole masses from continuum-Hbeta reverberation signatures, and (2) to look for velocity-dependent time delays that might be indicators of the gross kinematics of the broad-line region. We successfully measure Hbeta time delays and black hole masses for five AGNs, four of which have previous reverberation mass measurements. The values measured here are in agreement with earlier estimates, though there is some intrinsic scatter beyond the formal measurement errors. We observe velocity dependent Hbeta lags in each case, and find that the patterns have changed in the intervening five years for three AGNs that were also observed in 2007., Accepted for publication on ApJ; 32 pages, 16 figures, 10 tables

Published
2018

5. Space Telescope and Optical Reverberation Mapping Project. V. Optical Spectroscopic Campaign and Emission-line Analysis for NGC 5548

Author

S. Young, Brandon C. Kelly, J.-U. Pott, T. Hutchison, Scott M. Adams, E. Holmbeck, A. A. Breeveld, Jelle Kaastra, S. E. Rafter, Misty C. Bentz, G. A. Borman, P. Arévalo, D. A. Starkey, Michael T. Carini, I. E. Papadakis, M. Dietrich, Alis J. Deason, I. M. McHardy, Vardha N. Bennert, Kelly D. Denney, Michael D. Joner, Gabriela Canalizo, Justin Ely, A. Pancoast, Catherine J. Grier, D. C. Leonard, P. Ochner, Ying Zu, Zhiyuan Ma, A. Skielboe, J. van Saders, Bryan Scott, D. Horenstein, J. A. Kennea, Carl T. Coker, W. N. Brandt, A. Gupta, H. Yuk, D. Grupe, M. C. Bottorff, Michael Fausnaugh, Myungshin Im, Marianne Vestergaard, Rick Edelson, K. Schnülle, M. Spencer, Sang Chul Kim, C. Montouri, Miao Li, J. J. Jensen, W. Zheng, Nadia L. Zakamska, Gary J. Ferland, Ana M. Mosquera, N. V. Efimova, Steve Croft, Jenny E. Greene, Michael Eracleous, A. de Lorenzo-Cáceres, M. R. Goad, D. A. Saylor, Richard W. Pogge, Calen B. Henderson, Radosław Poleski, Jessie C. Runnoe, Carolin Villforth, G. De Rosa, A. V. Filippenko, Ori D. Fox, M. W. Lau, Thomas W.-S. Holoien, Michael S. Brotherton, H. Yan, Kirk T. Korista, C. Bazhaw, E. M. Cackett, B. Ou-Yang, Hagai Netzer, K. G. Teems, Michael A. Strauss, Aaron J. Barth, Alessandro Pizzella, Jon C. Mauerhan, Steven Villanueva, Christopher S. Kochanek, J. C. Lee, R. McGurk, M. H. Siegel, K. Flatland, F. Muller Sanchez, D. Mudd, Nicolas Tejos, Elinor L. Gates, P. Lira, Kelsey I. Clubb, S. V. Nazarov, Lorenzo Morelli, R. Musso, Cassandra Lochhaas, Patrick B. Hall, H.-I. Sung, Matthew T. Penny, Tommaso Treu, D. M. Crenshaw, H.-W. Rix, Bradley M. Peterson, Daniel J. Stevens, D. N. Okhmat, Patrick L. Kelly, Thomas G. Beatty, M. L. Nguyen, Ryan Norris, S. Mathur, Susanna Bisogni, Isaac Shivvers, S. Geier, Keith Horne, Phil Evans, G. V. Simonian, E. Dalla Bontà, Benjamin J. Shappee, A. L. King, Shai Kaspi, Enrico Maria Corsini, G. A. Kriss, C. S. Turner, J. R. Parks, Y. Weiss, M. Malkan, E. R. Manne-Nicholas, Jonathan Gelbord, Alessandro Siviero, Wei Zhu, S. G. Sergeev, F. MacInnis, Minjin Kim, J. A. Nousek, Cassidy Johnson, J. S. Brown, A. Bigley, S. Hicks, Julia M. Comerford, J. D. Jones, J. S. Schimoia, Jamie Tayar, K. V. Croxall, Laura Vican, Jong-Hak Woo, Garrett Somers, Phil Uttley, Liuyi Pei, N. Gehrels, J. E. Brown, Stacy Y. Kim, S. A. Klimanov, USA, Science & Technology Facilities Council, University of St Andrews. School of Physics and Astronomy, University of St Andrews. St Andrews Centre for Exoplanet Science, and High Energy Astrophys. & Astropart. Phys (API, FNWI)

Subjects
Doubly ionized oxygen, NDAS, nuclei [galaxies], FOS: Physical sciences, Astrophysics, Expected value, galaxies: active - galaxies: individual (NGC 5548) - galaxies: nuclei - galaxies: Seyfert, medicine.disease_cause, 01 natural sciences, Spitzer Space Telescope, Seyfert [galaxies], 0103 physical sciences, medicine, QB Astronomy, Emission spectrum, 010303 astronomy & astrophysics, QC, QB, Physics, 010308 nuclear & particles physics, Astronomy and Astrophysics, Light curve, Astrophysics - Astrophysics of Galaxies, Monitoring program, QC Physics, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), active [galaxies], individual (NGC 5548) [galaxies], Reverberation mapping, Ultraviolet
Abstract

We present the results of an optical spectroscopic monitoring program targeting NGC 5548 as part of a larger multi-wavelength reverberation mapping campaign. The campaign spanned six months and achieved an almost daily cadence with observations from five ground-based telescopes. The H$\beta$ and He II $\lambda$4686 broad emission-line light curves lag that of the 5100 $\AA$ optical continuum by $4.17^{+0.36}_{-0.36}$ days and $0.79^{+0.35}_{-0.34}$ days, respectively. The H$\beta$ lag relative to the 1158 $\AA$ ultraviolet continuum light curve measured by the Hubble Space Telescope is roughly $\sim$50% longer than that measured against the optical continuum, and the lag difference is consistent with the observed lag between the optical and ultraviolet continua. This suggests that the characteristic radius of the broad-line region is $\sim$50% larger than the value inferred from optical data alone. We also measured velocity-resolved emission-line lags for H$\beta$ and found a complex velocity-lag structure with shorter lags in the line wings, indicative of a broad-line region dominated by Keplerian motion. The responses of both the H$\beta$ and He II $\lambda$4686 emission lines to the driving continuum changed significantly halfway through the campaign, a phenomenon also observed for C IV, Ly $\alpha$, He II(+O III]), and Si IV(+O IV]) during the same monitoring period. Finally, given the optical luminosity of NGC 5548 during our campaign, the measured H$\beta$ lag is a factor of five shorter than the expected value implied by the $R_\mathrm{BLR} - L_\mathrm{AGN}$ relation based on the past behavior of NGC 5548., Comment: 22 pages, 13 figures, accepted to ApJ

Published
2017

6. Space telescope and optical reverberation mapping project. III. Optical continuum emission and broadband time delays in NGC 5548

Author

M. M. Fausnaugh, K. D. Denney, A. J. Barth, M. C. Bentz, M. C. Bottorff, M. T. Carini, K. V. Croxall, G. De Rosa, M. R. Goad, Keith Horne, M. D. Joner, S. Kaspi, M. Kim, S. A. Klimanov, C. S. Kochanek, D. C. Leonard, H. Netzer, B. M. Peterson, K. Schnülle, S. G. Sergeev, M. Vestergaard, W.-K. Zheng, Y. Zu, M. D. Anderson, P. Arévalo, C. Bazhaw, G. A. Borman, T. A. Boroson, W. N. Brandt, A. A. Breeveld, B. J. Brewer, E. M. Cackett, D. M. Crenshaw, E. Dalla Bontà, A. De Lorenzo-Cáceres, M. Dietrich, R. Edelson, N. V. Efimova, J. Ely, P. A. Evans, A. V. Filippenko, K. Flatland, N. Gehrels, S. Geier, J. M. Gelbord, L. Gonzalez, V. Gorjian, C. J. Grier, D. Grupe, P. B. Hall, S. Hicks, D. Horenstein, T. Hutchison, M. Im, J. J. Jensen, J. Jones, J. Kaastra, B. C. Kelly, J. A. Kennea, S. C. Kim, K. T. Korista, G. A. Kriss, J. C. Lee, P. Lira, F. MacInnis, E. R. Manne-Nicholas, S. Mathur, I. M. McHardy, C. Montouri, R. Musso, S. V. Nazarov, R. P. Norris, J. A. Nousek, D. N. Okhmat, A. Pancoast, I. Papadakis, J. R. Parks, L. Pei, R. W. Pogge, J.-U. Pott, S. E. Rafter, H.-W. Rix, D. A. Saylor, J. S. Schimoia, M. Siegel, M. Spencer, D. Starkey, H.-I. Sung, K. G. Teems, T. Treu, C. S. Turner, P. Uttley, C. Villforth, Y. Weiss, J.-H. Woo, H. Yan, S. Young, Science & Technology Facilities Council, University of St Andrews. School of Physics and Astronomy, and High Energy Astrophys. & Astropart. Phys (API, FNWI)

Subjects
Seyfert Supporting [Galaxies], Seyfert [Galaxies], galaxies: active, galaxies: individual (NGC 5548), galaxies: nuclei, galaxies: Seyfert, active [Galaxies], individual (NGC 5548) [Galaxies], Astrophysics::High Energy Astrophysical Phenomena, NDAS, FOS: Physical sciences, machine-readable tables [Material], Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, symbols.namesake, Spitzer Space Telescope, 0103 physical sciences, QB Astronomy, Astrophysics::Solar and Stellar Astrophysics, Emission spectrum, 010303 astronomy & astrophysics, QC, Astrophysics::Galaxy Astrophysics, active, galaxies: individual: NGC 5548, galaxies: nuclei, galaxies: Seyfert [galaxies], QB, Galáxia NGC 5548, Physics, 010308 nuclear & particles physics, Balmer series, Large Binocular Telescope, Astronomy and Astrophysics, Light curve, Astrophysics - Astrophysics of Galaxies, Galaxias seyfert, Galáxias ativas, Wavelength, QC Physics, 13. Climate action, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), nuclei [Galaxies], Eddington luminosity, symbols, Reverberation mapping, BDC, Nucleo galatico
Abstract

We present ground-based optical photometric monitoring data for NGC 5548, part of an extended multi-wavelength reverberation mapping campaign. The light curves have nearly daily cadence from 2014 January to July in nine filters (\emph{BVRI} and \emph{ugriz}). Combined with ultraviolet data from the \emph{Hubble Space Telescope} and \emph{Swift}, we confirm significant time delays between the continuum bands as a function of wavelength, extending the wavelength coverage from 1158\,\AA\ to the $z$ band ($\sim\!9160$\,\AA). We find that the lags at wavelengths longer than the {\it V} band are equal to or greater than the lags of high-ionization-state emission lines (such as He\,{\sc ii}\,$\lambda 1640$ and $\lambda 4686$), suggesting that the continuum-emitting source is of a physical size comparable to the inner broad-line region (BLR). The trend of lag with wavelength is broadly consistent with the prediction for continuum reprocessing by an accretion disk with $\tau \propto \lambda^{4/3}$. However, the lags also imply a disk radius that is 3 times larger than the prediction from standard thin-disk theory, assuming that the bolometric luminosity is 10\% of the Eddington luminosity ($L = 0.1L_{\rm Edd}$). Using optical spectra from the Large Binocular Telescope, we estimate the bias of the interband continuum lags due to BLR emission observed in the filters. We find that the bias for filters with high levels of BLR contamination ($\sim\! 20\%$) can be important for the shortest continuum lags, and likely has a significant impact on the {\it u} and {\it U} bands owing to Balmer continuum emission., Comment: 26 pages, 10 figures, accepted to ApJ. For a brief video describing the main results of this paper, please see: https://www.youtube.com/watch?v=yaYtcDvIoP0&feature=youtu.be

Published
2016

7. Reverberation Mapping of Optical Emission Lines in Five Active Galaxies

Author

Sang Chul Kim, Steven Villanueva, D. Mudd, A. Pancoast, Catherine J. Grier, Michael D. Joner, Christopher A. Onken, Y. Weiss, Sarah Eftekharzadeh, Miao Li, S. G. Sergeev, Stephen E. Rafter, Jessie C. Runnoe, F. MacInnis, Wei Zhu, Daniel J. Stevens, Michael S. Brotherton, A. L. King, T. Hutchison, Carolin Villforth, Radosław Poleski, J. S. Schimoia, Zhiyuan Ma, G. A. Borman, Michael Eracleous, Carl T. Coker, Misty C. Bentz, Calen B. Henderson, M. L. Nguyen, Keith Horne, Thomas W.-S. Holoien, Scott M. Adams, Garrett Somers, J. van Saders, B. Ou-Yang, Hartmut Winkler, Steven M. Crawford, B. M. Peterson, Ana M. Mosquera, Stefano Valenti, Todd Boroson, E. R. Manne-Nicholas, David J. Sand, J. S. Brown, M. Mason, D. A. Starkey, Liuyi Pei, J. E. Brown, Kevin V. Croxall, Aaron J. Barth, S. V. Nazarov, M. Spencer, Matthew T. Penny, Shai Kaspi, Richard W. Pogge, Cassandra Lochhaas, A. Bhattacharjee, Tommaso Treu, Jamie Tayar, Thomas G. Beatty, M. C. Bottorff, Michael Fausnaugh, C. Montuori, Kelly D. Denney, R. Musso, Benjamin J. Shappee, Christopher S. Kochanek, Encarni Romero-Colmenero, G. De Rosa, D. N. Okhmat, G. V. Simonian, Science & Technology Facilities Council, and University of St Andrews. School of Physics and Astronomy

Subjects
Reverberation, Active galactic nucleus, active [Galaxies], Radio galaxy, FOS: Physical sciences, Photoionization, Astrophysics, individual (MCG+08-11-011, NGC 2617, NGC 4051, 3C 382, Mrk 374) [Galaxies], Lambda, 01 natural sciences, Spectral line, 010305 fluids & plasmas, 0103 physical sciences, QB Astronomy, Emission spectrum, 010303 astronomy & astrophysics, QC, QB, Physics, Astronomy and Astrophysics, DAS, Astrophysics - Astrophysics of Galaxies, QC Physics, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Reverberation mapping
Abstract

We present the first results from an optical reverberation mapping campaign executed in 2014, targeting the active galactic nuclei (AGN) MCG+08-11-011, NGC 2617, NGC 4051, 3C 382, and Mrk 374. Our targets have diverse and interesting observational properties, including a "changing look" AGN and a broad-line radio galaxy. Based on continuum-H$\beta$ lags, we measure black hole masses for all five targets. We also obtain H$\gamma$ and He{\sc ii}\,$\lambda 4686$ lags for all objects except 3C 382. The He{\sc ii}\,$\lambda 4686$ lags indicate radial stratification of the BLR, and the masses derived from different emission lines are in general agreement. The relative responsivities of these lines are also in qualitative agreement with photoionization models. These spectra have extremely high signal-to-noise ratios (100--300 per pixel) and there are excellent prospects for obtaining velocity-resolved reverberation signatures., Comment: 34 pages, 12 figures, published in ApJ. For a video summarizing the main results, see https://www.youtube.com/watch?v=KaC-jPsIY0Q

Published
2016
Full Text
View/download PDF

8. Space Telescope and Optical Reverberation Mapping Project VI: reverberating Disk Models for NGC 5548

Author

Michael T. Carini, S. Mathur, S. G. Sergeev, H.-I. Sung, D. A. Saylor, Shai Kaspi, D. N. Okhmat, A. V. Filippenko, M. C. Bottorff, Marianne Vestergaard, S. Hicks, F. MacInnis, Minjin Kim, T. Hutchison, J. A. Kennea, I. M. McHardy, Kirk T. Korista, Y. Weiss, Carolin Villforth, Bradley M. Peterson, G. De Rosa, C. Bazhaw, E. Dalla Bontà, M. Spencer, Aaron J. Barth, Michael D. Joner, P. Lira, Richard W. Pogge, J. S. Schimoia, D. Horenstein, Ying Zu, S. Geier, A. A. Breeveld, G. A. Borman, Brandon C. Kelly, Phil Evans, M. Dietrich, K. Schnülle, Kelly D. Denney, J.-U. Pott, P. Arévalo, D. A. Starkey, Todd Boroson, J. A. Nousek, J. D. Jones, S. Young, Patrick B. Hall, Justin Ely, Jelle Kaastra, A. de Lorenzo-Cáceres, S. E. Rafter, Misty C. Bentz, A. Pancoast, L. Gonzalez, C. Montouri, J. J. Jensen, E. M. Cackett, M. H. Siegel, Myungshin Im, W. Zheng, S. V. Nazarov, Varoujan Gorjian, Sang Chul Kim, D. Grupe, Catherine J. Grier, D. C. Leonard, H. Yan, K. G. Teems, E. R. Manne-Nicholas, K. Flatland, W. N. Brandt, G. A. Kriss, Ryan Norris, Keith Horne, Jong-Hak Woo, Liuyi Pei, K. V. Croxall, C. S. Turner, J. R. Parks, D. M. Crenshaw, H.-W. Rix, Michael Fausnaugh, Rick Edelson, N. V. Efimova, M. R. Goad, Jonathan Gelbord, J. C. Lee, R. Musso, S. A. Klimanov, N. Gehrels, Phil Uttley, Christopher S. Kochanek, Science & Technology Facilities Council, University of St Andrews. School of Physics and Astronomy, University of St Andrews. St Andrews Centre for Exoplanet Science, and High Energy Astrophys. & Astropart. Phys (API, FNWI)

Subjects
Accretion, Seyfert [Galaxies], active [Galaxies], Point source, individual (NGC 5548) [Galaxies], Astrophysics::High Energy Astrophysical Phenomena, galaxies: active, NDAS, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, medicine.disease_cause, 01 natural sciences, Spectral line, Spitzer Space Telescope, accretion, 0103 physical sciences, medicine, QB Astronomy, Astrophysics::Solar and Stellar Astrophysics, Black-body radiation, 010303 astronomy & astrophysics, accretion, accretion disks, galaxies: individual (NGC 5548), galaxies: nuclei, galaxies: Seyfert, QC, Astrophysics::Galaxy Astrophysics, QB, Physics, High Energy Astrophysical Phenomena (astro-ph.HE), 010308 nuclear & particles physics, accretion disks, Astronomy and Astrophysics, Light curve, Astrophysics - Astrophysics of Galaxies, Galaxy, active, galaxies: individual: NGC 5548, galaxies: nuclei, galaxies: Seyfert [accretion, accretion disks, galaxies], QC Physics, Space and Planetary Science, nuclei [Galaxies], Astrophysics of Galaxies (astro-ph.GA), Accretion disks, Reverberation mapping, Astrophysics::Earth and Planetary Astrophysics, Astrophysics - High Energy Astrophysical Phenomena, Ultraviolet
Abstract

We conduct a multiwavelength continuum variability study of the Seyfert 1 galaxy NGC 5548 to investigate the temperature structure of its accretion disk. The 19 overlapping continuum light curves (1158 to 9157 angstroms) combine simultaneous HST , Swift , and ground-based observations over a 180 day period from 2014 January to July. Light-curve variability is interpreted as the reverberation response of the accretion disk to irradiation by a central time-varying point source. Our model yields the disk inclination, i, temperature T1 at 1 light day from the black hole, and a temperature-radius slope, alpha. We also infer the driving light curve and find that it correlates poorly with both the hard and soft X-ray light curves, suggesting that the X-rays alone may not drive the ultraviolet and optical variability over the observing period. We also decompose the light curves into bright, faint, and mean accretion-disk spectra. These spectra lie below that expected for a standard blackbody accretion disk accreting at L/LEdd = 0.1, Comment: V2: Oops wrong title! V1: Accepted for publication in ApJ, 20 Pages, 11 Figures

Published
2016
Full Text
View/download PDF

9. Continuum Reverberation Mapping of the Accretion Disks in Two Seyfert 1 Galaxies

Author

Scott M. Adams, G. A. Borman, Miao Li, Carolin Villforth, Radosław Poleski, Calen B. Henderson, Matthew T. Penny, E. R. Manne-Nicholas, Cassandra Lochhaas, Tommaso Treu, Thomas G. Beatty, R. Musso, Thomas W.-S. Holoien, Dirk Grupe, F. MacInnis, B. Ou-Yang, Aaron J. Barth, Steven Villanueva, Catherine J. Grier, Jessie C. Runnoe, Y. Weiss, Wei Zhu, Michael D. Joner, Zhiyuan Ma, D. Mudd, A. Pancoast, Shai Kaspi, K. V. Croxall, Ana M. Mosquera, Daniel J. Stevens, Carl T. Coker, T. Hutchison, Michael Eracleous, S. G. Sergeev, Todd A. Boroson, Christopher S. Kochanek, Encarni Romero-Colmenero, S. V. Nazarov, G. De Rosa, Stefano Valenti, J. Van Saders, M. Spencer, Kelly D. Denney, M. Mason, Misty C. Bentz, Richard W. Pogge, A. Bhattacharjee, D. N. Okhmat, G. V. Simonian, J. S. Brown, Sang Chul Kim, Steven M. Crawford, C. Montuori, Bradley M. Peterson, Benjamin J. Shappee, Christopher A. Onken, Sarah Eftekharzadeh, J. E. Brown, Jamie Tayar, M. L. Nguyen, Keith Horne, A. L. King, Liuyi Pei, G. Somers, S. E. Rafter, Michael S. Brotherton, Hartmut Winkler, D. A. Starkey, J. S. Schimoia, Michael Fausnaugh, M. C. Bottorff, David J. Sand, Science & Technology Facilities Council, University of St Andrews. School of Physics and Astronomy, and University of St Andrews. St Andrews Centre for Exoplanet Science

Subjects
Physics, Galaxies, Seyfert, individual (MCG+08-11-011, NGC 2617), FOS: Physical sciences, Library science, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, 01 natural sciences, 3rd-NDAS, 010305 fluids & plasmas, Graduate research, QC Physics, Accretion, accretion discs, Accretion disc, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), 0103 physical sciences, QB Astronomy, Reverberation mapping, 010303 astronomy & astrophysics, QC, individual: MCG+08-11-011, NGC 2617, galaxies: Seyfert, Astrophysics - Astrophysics of Galaxies [accretion, accretion disks, galaxies], QB
Abstract

We present optical continuum lags for two Seyfert 1 galaxies, MCG+08-11-011 and NGC 2617, using monitoring data from a reverberation mapping campaign carried out in 2014. Our light curves span the ugriz filters over four months, with median cadences of 1.0 and 0.6 days for MCG+08-11-011 and NGC\,2617, respectively, combined with roughly daily X-ray and near-UV data from Swift for NGC 2617. We find lags consistent with geometrically thin accretion-disk models that predict a lag-wavelength relation of $\tau \propto \lambda^{4/3}$. However, the observed lags are larger than predictions based on standard thin-disk theory by factors of 3.3 for MCG+08-11-011 and 2.3 for NGC\,2617. These differences can be explained if the mass accretion rates are larger than inferred from the optical luminosity by a factor of 4.3 in MCG+08-11-011 and a factor of 1.3 in NGC\,2617, although uncertainty in the SMBH masses determines the significance of this result. While the X-ray variability in NGC\,2617 precedes the UV/optical variability, the long 2.6 day lag is problematic for coronal reprocessing models., Comment: Accepted to ApJ, please send comments to faus@mit.edu. 24 pages, 8 figures

Published
2018

Catalog

Books, media, physical & digital resources
See catalog results