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A complete catalogue of merger fractions in AGN hosts
Carolin Villforth
Sep 11, 2023
Despite the importance of Active Galactic Nuclei (AGN) in galaxy evolution, the mechanisms that fuel AGN activity remain poorly understood. Theoretical models suggest that major mergers of galaxies contribute strongly to AGN...
A complete catalogue of merger fractions in AGN hosts
Carolin Villforth
Sep 11, 2023
Despite the importance of Active Galactic Nuclei (AGN) in galaxy evolution, the mechanisms that fuel AGN activity remain poorly understood. Theoretical models suggest that major mergers of galaxies contribute strongly to AGN...
Anatomy of a Slow Merger
Abstract
The dozens of compact object mergers detected by LIGO/Virgo raise a key theoretical question: how do initially wide binaries shrink sufficiently quickly that they are able...
A long-lived neutron star merger remnant in GW170817
L. Piro, Bing Zhang, Eleanora Troja, Geoffrey Ryan, Hendrik Van Eerten, R Ricci, M. H. Wieringa, A. Tiengo, N Butler, S. B. Cenko, O. D. Fox, H. G. Khandrika, G. Novara, T. Sakamoto
Feb 01, 2019
Multimessenger observations of GW170817 have not conclusively established whether the merger remnant is a black hole (BH) or a neutron star (NS). We show that a long-lived magnetized NS with a poloidal field B ≈ 1012 G is fully...
Multi-messenger observations of a binary neutron star merger
BP Abbott, R Abbott, TD Abbott, F Acernese, K Ackley, C Adams, T Adams, P Addesso, RX Adhikari, VB Adya, C Affeldt, M Afrough, B Agarwal, M Agathos, K Agatsuma, N Aggarwal, OD Aguiar, L Aiello, A Ain, P Ajith, B Allen, G Allen, A Allocca, PA Altin, A Amato, A Ananyeva, SB Anderson, WG Anderson, SV Angelova, S Antier, S Appert, K Arai, MC Araya, JS Areeda, N Arnaud, KG Arun, S Ascenzi, G Ashton, M Ast, SM Aston, P Astone, DV Atallah, P Aufmuth, C Aulbert, K AultONeal, C Austin, A Avila-Alvarez, S Babak, P Bacon, MKM Bader, S Bae, PT Baker, F Baldaccini, G Ballardin, SW Ballmer, S Banagiri, JC Barayoga, SE Barclay, BC Barish, D Barker, K Barkett, F Barone, B Barr, L Barsotti, M Barsuglia, D Barta, SD Barthelmy, J Bartlett, I Bartos, R Bassiri, A Basti, JC Batch, M Bawaj, JC Bayley, M Bazzan, B Bécsy, C Beer, M Bejger, I Belahcene, AS Bell, BK Berger, G Bergmann, JJ Bero, CPL Berry, D Bersanetti
Sep 25, 2018
On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi...
A long-lived neutron star merger remnant in GW170817
L. Piro, Bing Zhang, Eleanora Troja, Geoffrey Ryan, Hendrik Van Eerten, R Ricci, M. H. Wieringa, A. Tiengo, N Butler, S. B. Cenko, O. D. Fox, H. G. Khandrika, G. Novara, T. Sakamoto
Feb 01, 2019
Multimessenger observations of GW170817 have not conclusively established whether the merger remnant is a black hole (BH) or a neutron star (NS). We show that a long-lived magnetized NS with a poloidal field B ≈ 1012 G is fully...
The redshift evolution of major merger triggering of luminous AGN
Timothy Hewlett, Carolin Villforth, Vivienne Wild, Jairo Mendez-Abreu, Milena Pawlik, Kate Rowlands
May 01, 2017
Active galactic nuclei (AGN), particularly the most luminous AGN, are commonly assumed to be triggered through major mergers, however observational evidence for this scenario is mixed. To investigate any influence of galaxy...
The redshift evolution of major merger triggering of luminous AGN
Timothy Hewlett, Carolin Villforth, Vivienne Wild, Jairo Mendez-Abreu, Milena Pawlik, Kate Rowlands
May 01, 2017
Active galactic nuclei (AGN), particularly the most luminous AGN, are commonly assumed to be triggered through major mergers, however observational evidence for this scenario is mixed. To investigate any influence of galaxy...
Multi-messenger Observations of a Binary Neutron Star Merger
LIGO Scientific Collaboration, Virgo Collaboration, GBM Fermi, INTEGRAL, IceCube Collaboration, AstroSat Cadmium Zinc Telluride Imager Team, IPN Collaboration, The Insight-Hxmt Collaboration, ANTARES Collaboration, The Swift Collaboration, AGILE Team, The 1M2H Team, The Dark Energy Camera GW-EM Collaboration, the DES Collaboration, The DLT40 Collaboration, GRAWITA, GRAvitational Wave Inaf TeAm, The Fermi Large Area Telescope Collaboration, ATCA, Australia Telescope Compact Array, ASKAP, Australian SKA Pathfinder, Las Cumbres Observatory Group, OzGrav, DWF, AST3, CAASTRO Collaborations, The VINROUGE Collaboration, MASTER Collaboration, J-GEM, GROWTH, JAGWAR, NRAO Caltech-, TTU-NRAO, NuSTAR Collaborations, Pan-STARRS, The MAXI Team, TZAC Consortium, KU Collaboration, Nordic Optical Telescope, ePESSTO, GROND, Texas Tech University, SALT Group, TOROS, Transient Robotic Observatory of the South Collaboration, The BOOTES Collaboration, MWA, Murchison Widefield Array, The CALET Collaboration, IKI-GW Follow-up Collaboration, H. E. S. S. Collaboration, LOFAR Collaboration, LWA, Long Wavelength Array, HAWC Collaboration, The Pierre Auger Collaboration, ALMA Collaboration, Euro VLBI Team, Pi of the Sky Collaboration, The Chandra Team at McGill University, DFN, Desert Fireball Network, ATLAS, High Time Resolution Universe Survey, RIMAS, RATIR, SKA South Africa/MeerKAT, Hendrik Van Eerten
Oct 16, 2017
On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi...
Multi-messenger Observations of a Binary Neutron Star Merger
LIGO Scientific Collaboration, Virgo Collaboration, GBM Fermi, INTEGRAL, IceCube Collaboration, AstroSat Cadmium Zinc Telluride Imager Team, IPN Collaboration, The Insight-Hxmt Collaboration, ANTARES Collaboration, The Swift Collaboration, AGILE Team, The 1M2H Team, The Dark Energy Camera GW-EM Collaboration, the DES Collaboration, The DLT40 Collaboration, GRAWITA, GRAvitational Wave Inaf TeAm, The Fermi Large Area Telescope Collaboration, ATCA, Australia Telescope Compact Array, ASKAP, Australian SKA Pathfinder, Las Cumbres Observatory Group, OzGrav, DWF, AST3, CAASTRO Collaborations, The VINROUGE Collaboration, MASTER Collaboration, J-GEM, GROWTH, JAGWAR, NRAO Caltech-, TTU-NRAO, NuSTAR Collaborations, Pan-STARRS, The MAXI Team, TZAC Consortium, KU Collaboration, Nordic Optical Telescope, ePESSTO, GROND, Texas Tech University, SALT Group, TOROS, Transient Robotic Observatory of the South Collaboration, The BOOTES Collaboration, MWA, Murchison Widefield Array, The CALET Collaboration, IKI-GW Follow-up Collaboration, H. E. S. S. Collaboration, LOFAR Collaboration, LWA, Long Wavelength Array, HAWC Collaboration, The Pierre Auger Collaboration, ALMA Collaboration, Euro VLBI Team, Pi of the Sky Collaboration, The Chandra Team at McGill University, DFN, Desert Fireball Network, ATLAS, High Time Resolution Universe Survey, RIMAS, RATIR, SKA South Africa/MeerKAT, Hendrik Van Eerten
Oct 16, 2017
On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi...
Testing the key role of the stellar mass-halo mass relation in galaxy merger rates and morphologies via DECODE, a novel Discrete statistical sEmi-empiriCal mODEl
Hao Fu, Francesco Shankar, Mohammadreza Ayromlou, Max Dickson, Ioanna Koutsouridou, Yetli Rosas-Guevara, Christopher Marsden, Kristina Brocklebank, Mariangela Bernardi, Nikolaos Shiamtanis, Joseph Williams, Lorenzo Zanisi, Viola Allevato, Lumen Boco, Silvia Bonoli, Andrea Cattaneo, Paola Dimauro, Fangzhou Jiang, Andrea Lapi, Nicola Menci, Stefani Petropoulou, Carolin Villforth
Nov 30, 2022
The relative roles of mergers and star formation in regulating galaxy growth are still a matter of intense debate. We here present our DECODE, a new Discrete statistical sEmi-empiriCal mODEl specifically designed to predict...
Testing the key role of the stellar mass-halo mass relation in galaxy merger rates and morphologies via DECODE, a novel Discrete statistical sEmi-empiriCal mODEl
Hao Fu, Francesco Shankar, Mohammadreza Ayromlou, Max Dickson, Ioanna Koutsouridou, Yetli Rosas-Guevara, Christopher Marsden, Kristina Brocklebank, Mariangela Bernardi, Nikolaos Shiamtanis, Joseph Williams, Lorenzo Zanisi, Viola Allevato, Lumen Boco, Silvia Bonoli, Andrea Cattaneo, Paola Dimauro, Fangzhou Jiang, Andrea Lapi, Nicola Menci, Stefani Petropoulou, Carolin Villforth
Nov 30, 2022
The relative roles of mergers and star formation in regulating galaxy growth are still a matter of intense debate. We here present our DECODE, a new Discrete statistical sEmi-empiriCal mODEl specifically designed to predict...
Observational constraints on the optical and near-infrared emission from the neutron star-black hole binary merger S190814bv
On 2019 August 14, the LIGO and Virgo interferometers detected a high-significance event labelled S190814bv. Preliminary analysis of the GW data suggests that the event was likely due to the merger of a compact binary system...
Observational constraints on the optical and near-infrared emission from the neutron star-black hole binary merger S190814bv
On 2019 August 14, the LIGO and Virgo interferometers detected a high-significance event labelled S190814bv. Preliminary analysis of the GW data suggests that the event was likely due to the merger of a compact binary system...
Evidence for Merger-driven Growth in Luminous, High-z, Obscured AGNs in the CANDELS/COSMOS Field
J. L. Donley, J. Kartaltepe, D. Kocevski, M. Salvato, P. Santini, H. Suh, F. Civano, A. M. Koekemoer, J. Trump, M. Brusa, C. Cardamone, A. Castro, M. Cisternas, C. Conselice, D. Croton, N. Hathi, C. Liu, R. A. Lucas, P. Nair, D. Rosario, D. Sanders, B. Simmons, C. Villforth, D. M. Alexander, E. F. Bell, S. M. Faber, N. A. Grogin, J. Lotz, D. H. McIntosh, T. Nagao
Jan 23, 2018
While major mergers have long been proposed as a driver of both active galactic nucleus (AGN) activity and theMBH-sbulge relation, studies of moderate to high-redshift Seyfert-luminosity AGN hosts have found little...
Evidence for Merger-driven Growth in Luminous, High-z, Obscured AGNs in the CANDELS/COSMOS Field
J. L. Donley, J. Kartaltepe, D. Kocevski, M. Salvato, P. Santini, H. Suh, F. Civano, A. M. Koekemoer, J. Trump, M. Brusa, C. Cardamone, A. Castro, M. Cisternas, C. Conselice, D. Croton, N. Hathi, C. Liu, R. A. Lucas, P. Nair, D. Rosario, D. Sanders, B. Simmons, C. Villforth, D. M. Alexander, E. F. Bell, S. M. Faber, N. A. Grogin, J. Lotz, D. H. McIntosh, T. Nagao
Jan 23, 2018
While major mergers have long been proposed as a driver of both active galactic nucleus (AGN) activity and theMBH-sbulge relation, studies of moderate to high-redshift Seyfert-luminosity AGN hosts have found little...
Global post-merger agility, transactive memory systems and human resource management practices
In this article, a conceptual model is developed in the context of global mergers and acquisitions (M&As). The model integrates ability, motivation and opportunity (AMO)-enhancing human resource management (HRM) practices...
Global post-merger agility, transactive memory systems and human resource management practices
In this article, a conceptual model is developed in the context of global mergers and acquisitions (M&As). The model integrates ability, motivation and opportunity (AMO)-enhancing human resource management (HRM) practices...
CANDELS
D. D. Kocevski, S. M. Faber, M. Mozena, A. M. Koekemoer, K. Nandra, C. Rangel, E. S. Laird, M. Brusa, S. Wuyts, J. R. Trump, D. C. Koo, R. S. Somerville, E. F. Bell, J. M. Lotz, D. M. Alexander, F. Bournaud, C. J. Conselice, T. Dahlen, A. Dekel, J. L. Donley, J. S. Dunlop, A. Finoguenov, A. Georgakakis, M. Giavalisco, Y. Guo, N. A. Grogin, N. P. Hathi, S. Juneau, J. S. Kartaltepe, R. A. Lucas, E. J. McGrath, D. H. McIntosh, B. Mobasher, A. R. Robaina, D. Rosario, A. N. Straughn, A. van der Wel, C. Villforth
Jan 01, 0001
Using Hubble Space Telescope/WFC3 imaging taken as part of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey, we examine the role that major galaxy mergers play in triggering active galactic nucleus (AGN)...
CANDELS
D. D. Kocevski, S. M. Faber, M. Mozena, A. M. Koekemoer, K. Nandra, C. Rangel, E. S. Laird, M. Brusa, S. Wuyts, J. R. Trump, D. C. Koo, R. S. Somerville, E. F. Bell, J. M. Lotz, D. M. Alexander, F. Bournaud, C. J. Conselice, T. Dahlen, A. Dekel, J. L. Donley, J. S. Dunlop, A. Finoguenov, A. Georgakakis, M. Giavalisco, Y. Guo, N. A. Grogin, N. P. Hathi, S. Juneau, J. S. Kartaltepe, R. A. Lucas, E. J. McGrath, D. H. McIntosh, B. Mobasher, A. R. Robaina, D. Rosario, A. N. Straughn, A. van der Wel, C. Villforth
Jan 01, 0001
Using Hubble Space Telescope/WFC3 imaging taken as part of the Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey, we examine the role that major galaxy mergers play in triggering active galactic nucleus (AGN)...
The core of the massive cluster merger MACS J0417.5-1154 as seen by VLT/MUSE
Mathilde Jauzac, Guillaume Mahler, Alastair C. Edge, Keren Sharon, Steven Gillman, Harald Ebeling, David Harvey, Johan Richard, Stephen L. Hamer, Michele Fumagalli, A. Mark Swinbank, Jean-Paul Kneib, Richard Massey, Philippe Salome
Mar 31, 2019
We present a multiwavelength analysis of the core of the massive galaxy cluster MACS J0417.5.1154 (z = 0.441). Our analysis takes advantage of Very Large Telescope/Multi-Unit Spectroscopic Explorer observations which allowthe...
The host galaxies of FeLoBAL quasars at z ∼ 0.9 are not dominated by recent major mergers
C. Villforth, H. Herbst, F. Hamann, T. Hamilton, C. Bertemes, A. Efthymiadou, T. Hewlett
Feb 01, 2019
Theoretical models have suggested an evolutionary model for quasars, in which most of luminous quasars are triggered by major mergers. It is also postulated that reddening as well as powerful outflows indicate an early phase...
The core of the massive cluster merger MACS J0417.5-1154 as seen by VLT/MUSE
Mathilde Jauzac, Guillaume Mahler, Alastair C. Edge, Keren Sharon, Steven Gillman, Harald Ebeling, David Harvey, Johan Richard, Stephen L. Hamer, Michele Fumagalli, A. Mark Swinbank, Jean-Paul Kneib, Richard Massey, Philippe Salome
Mar 31, 2019
We present a multiwavelength analysis of the core of the massive galaxy cluster MACS J0417.5.1154 (z = 0.441). Our analysis takes advantage of Very Large Telescope/Multi-Unit Spectroscopic Explorer observations which allowthe...
Competition policy and the profitability of corporate acquisitions
Merger control exists to help safeguard effective competition. However, findings from a natural experiment suggest that regulatory merger control reduces the profitability of corporate acquisitions. Uncertainty about merger...
Identifying Galaxy Mergers in Simulated CEERS NIRCam Images Using Random Forests
Abstract
Identifying merging galaxies is an important—but difficult—step in galaxy evolution studies. We present random forest (RF) classifications of galaxy mergers from simulated...
C Rose, JS Kartaltepe, GF Snyder, V Rodriguez-Gomez, LY Aaron Yung, PA Haro, MB Bagley, A Calabró, NJ Cleri, MC Cooper, L Costantin, D Croton, M Dickinson, SL Finkelstein, B Häußler, BW Holwerda, AM Koekemoer, P Kurczynski, RA Lucas, KB Mantha, C Papovich, PG Pérez-González, N Pirzkal, RS Somerville, AN Straughn, S Tacchella
Jan 10, 2023
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