Program Schedule and Abstract Book 17th HEAD Divisional Meeting March 15 - 23, 2019 The Program Report was last updated March 21, 2019 at 01:26 AM EDT. To view the most recent meeting schedule online, visit https://head17.abstractcentral.com/planner.jsp Friday, March 15, 2019 You have nothing scheduled for this day Saturday, March 16, 2019 You have nothing scheduled for this day Sunday, March 17, 2019 Time Session or Event Info 3:00 PM-4:00 PM, Executive Boardroom (Portola Hotel and Spa), HEAD Executive Committee Meeting (Invitation Only), Invitation-Only Event 3:00 PM-7:00 PM, De Anza Ballroom Foyer (Portola Hotel and Spa), Registration, Attendee Event 5:30 PM-7:00 PM, DeAnza II & III (Portola Hotel and Spa), 99. Schramm Public Talk: The Stories Behind Space Stories or: How Research Goes Public, Joshua Sokol, Public Event, Chair: Megan Watzke, [email protected], Cfa Harvard 7:00 PM-8:30 PM, Club Room (Portola Hotel and Spa), Opening Reception & HEAD at 50, Attendee Event Monday, March 18, 2019 Time Session or Event Info 7:00 AM-8:00 AM, Redwood Room (Portola Hotel and Spa), Session Chair Breakfast, Invitation-Only Event 7:30 AM-6:00 PM, De Anza Ballroom Foyer (Portola Hotel and Spa), Registration, Attendee Event 8:15 AM-8:30 AM, DeAnza II & III (Portola Hotel and Spa), Welcome Address: Rob Petre, HEAD Chair, Attendee Event 8:30 AM-10:00 AM, DeAnza II & III (Portola Hotel and Spa), 100. Stellar Compact I, Oral Session, Chair: Randall Smith, [email protected], Center for Astrophysics | Harvard & Smithsonian 100.01. Ultraluminous X-ray Sources in Extragalactic Globular 8:30-8:45 AM Clusters K. Dage; S. Zepf; M. Peacock; A. Bahramian; A. Kundu; T. Maccarone 100.02. Understanding the orbital period and accretion torque in the ultra-luminous X-ray pulsar NGC 7793 P13 F. Fuerst; D. Walton; M. 8:45-9:00 AM Heida; F. Harrison; D. Barret; M. Brightman; A. Fabian; M. Middleton; C. Pinto; V. Rana; F. Tramper; N. Webb; P. Kretschmar 100.03. A Comprehensive Chandra Study of the Disk Winds in the 9:00-9:15 AM Black Hole Candidate 4U 1630−472 N.A. Trueba; J. Miller; J. Kaastra; A. Zoghbi 100.04. The New Black Hole Binary Candidate Swift J1658.2-4242 Observed by NuSTAR, Swift and XMM-Newton Y. Xu; F. Harrison; J. 9:15-9:30 AM Tomsick; J. Kennea; D. Walton; J. Miller; D. Barret; A. Fabian; K. Forster; F. Fuerst; P. Gandhi; J.A. García 100.05. Accretion States and BH Spin in MAXI J1535-571 with NICER and NuSTAR J. Neilsen; J.F. Steiner; R. Remillard; P. Uttley; 9:30-9:45 AM J. Homan; L. Jones; S. Motta; M. Coriat; R. Fender; S. Corbel; G. Ponti; Z. Arzoumanian; K. Gendreau; R. Ludlam 100.06. Spectral Evolution in the Ultra-compact X-ray binary 4U 1543- 624 during the 2017 Outburst R. Ludlam; J. Miller; L. Shishkovsky; 9:45-10:00 AM J.A. García; J. Miller-Jones; A. Fabian; K. Gendreau; Z. Arzoumanian; L. Natalucci; M. Fiocchi 10:00 AM-10:30 AM, De Anza I, Ballroom Foyer, Portola & Bonsai Room (Portola Hotel and Spa), AM Coffee Break, Attendee Event 10:30 AM-12:00 PM, DeAnza II & III (Portola Hotel and Spa), 101. AGN I, Oral Session, Chair: Christopher Reynolds, [email protected], University of Cambridge 101.01. The ongoing transformation of Seyfert galaxy 1ES 1927+654 E. Kara; C. Ricci; B. Trakhtenbrot; I. Arcavi; M. Loewenstein; A. 10:30-10:45 AM Fabian; K. Gendreau; R. Remillard; Z. Arzoumanian; C. Macleod; E. Cackett; D. Altamirano; D. Pasham; J.F. Steiner; K. Wood 101.02. A Careful Examination of the Physical Conditions of a Warm 10:45-11:00 AM Corona in AGN Accretion Disks D. Ballantyne 101.03. AGN OBSCURATION, UNIFICATION AND THE COSMIC X- 11:00-11:15 AM RAY BACKGROUND R. Walter; C. Panagiotou 101.04. The deepest look at the accretion process with a 2 megasecond observation of a highly variable active galaxy W. Alston; A. Fabian; D. Buisson; E. Kara; M. Parker; A. Lohfink; P. Uttley; D. 11:15-11:30 AM Wilkins; C. Pinto; B. De Marco; E. Cackett; M. Middleton; D. Walton; C. Reynolds; J. Jiang; L. Gallo; A. Zoghbi; G. Miniutti; M. Dovciak; A. Young 101.05. A Multiwavelength Exploration of Sgr A*'s Event Horizon 11:30-11:45 AM Dynamics D. Haggard; H. Boyce; M. Nynka 101.06. Size of Unresolved X-ray Emission of Radio-Loud Quasars X. 11:45-12:00 PM Dai; B. Dogruel; E. Guerras; C. Morgan 12:00 PM-1:30 PM, DeAnza II & III (Portola Hotel and Spa), PCOS Town Hall, Town Hall, Chair: John Conklin, [email protected], University of Florida, Gainesville 1:30 PM-3:00 PM, Serra Ballroom II (Portola Hotel and Spa), 103. Nuclear Equation of State, Special Session, Organizer: Randall Smith, [email protected], Center for Astrophysics | Harvard & Smithsonian 1:30-2:00 PM 103.01. Equation of state constraints from NICER A. Watts 103.02. Multi-messenger Neutron Star Astrophysics and Determining 2:00-2:30 PM the Composition of the Neutron Star Core A.W. Steiner; S. Beloin; S. Han; K. Odbadrakh 2:30-3:00 PM 103.03. Studying the Stars here on earth S. Yennello 1:30 PM-3:00 PM, DeAnza II & III (Portola Hotel and Spa), 104. Stages of Galaxy Cluster Formation and Evolution, Special Session, Organizer: Esra Bulbul, [email protected], Center for Astrophysics | Harvard & Smithsonian; Organizer: Andra Stroe, [email protected], Center for Astrophysics | Harvard & Smithsonian 104.01. The Nature of Nurture: An Optical/NIR Exploration of High- 1:30-1:52 PM Density Environments at z>2 B.C. Lemaux 104.02. Feeding the Beasts: Star formation and molecular gas inside 1:52-2:14 PM of galaxy clusters. T. Webb 104.03. Unveiling galaxy cluster candidates at z>2 with Planck and 2:14-2:36 PM NASA's Great Observatories; Prospects for JWST, Euclid, WFIRST, Athena and Lynx. H. Dole 2:36-2:58 PM 104.04. Overview of High-Redshift SZ Cluster Surveys L. Bleem 3:00 PM-3:30 PM, De Anza I, Ballroom Foyer, Portola & Bonsai Room (Portola Hotel and Spa), PM Coffee Break, Attendee Event 3:30 PM-5:00 PM, DeAnza II & III (Portola Hotel and Spa), 105. Chandra at 20, Special Session, Organizer: David Huenemoerder, [email protected], MIT Kavli Institute 105.01. The Impact of Chandra on Black Hole Astrophysics C. 3:30-3:48 PM Reynolds 3:48-4:06 PM 105.02. Chandra’s Stars T. Ayres 105.03. New perspectives on the interstellar medium enabled by 4:06-4:24 PM Chandra L. Corrales 105.04. Constraining the seeds of super-massive black holes with 4:24-4:42 PM high-res X-ray imaging observations E. Gallo 4:42-5:00 PM 105.05. High Resolution Spectroscopy with Chandra F. Paerels 5:00 PM-6:00 PM, DeAnza II & III (Portola Hotel and Spa), HEAD Business Meeting , Invitation-Only Event 6:00 PM-7:30 PM, De Anza I, Ballroom Foyer, Portola & Bonsai Room (Portola Hotel and Spa), 106. AGN Poster Session, Poster Session 106.01. Time-Domain Signatures of Supermassive Black Hole 6:00 PM-7:30 PM Binaries K. Whitley; K. Gultekin; M. Ruszkowski 106.02. Can we measure black hole spin in quasar 4C 74.26? P. 6:00 PM-7:30 PM Tzanavaris; T. Yaqoob; A. Ptak; S. LaMassa; M. Yukita 106.03. The Accretion History of AGN: Supermassive Black Hole 6:00 PM-7:30 PM Population Synthesis Model T.T. Ananna 106.04. The joint fluctuations of the CIB and CXB: new ideas, new 6:00 PM-7:30 PM results and future developments N. Cappelluti 106.05. AGN Synthesis of the Cosmic X-ray Background in the Era of 6:00 PM-7:30 PM NuSTAR R.C. Hickox; M. Jones; T.T. Ananna 106.06. A universal model of black hole accretion uncovering AGN in 6:00 PM-7:30 PM the Cosmic X-ray background M. Jones 106.07. The Unresolved Cosmic X-ray Background as Measured by 6:00 PM-7:30 PM NuSTAR S. Rossland; D. Wik 106.08. Gamma-ray Analysis of the Most Energetic Blazars to Probe 6:00 PM-7:30 PM the Cosmos R. Hsu; C. Wang 106.09. Using Machine Learning and Swift-XRT to Characterize likely 6:00 PM-7:30 PM X-ray Counterparts to Fermi Unassociated Sources A. Kaur; A. Falcone; M. Stroh 106.10. Measuring the EBL using GeV and TeV observations A. 6:00 PM-7:30 PM Desai; K. Helgason; M. Ajello; A. Dominguez; V.S. Paliya; J. Finke; D. Hartmann 106.11. Recent Highlights from the VERITAS Extragalactic Gamma- 6:00 PM-7:30 PM ray Observations A. Furniss 106.12. Initial stages of black hole activity probed with X-rays from 6:00 PM-7:30 PM young extragalactic radio sources M. Sobolewska; A. Siemiginowska; M. Guainazzi; M. Hardcastle; G. Migliori; L. Ostorero; L. Stawarz 106.13. Efficient non-thermal particle acceleration mediated by the 6:00 PM-7:30 PM kink instability in jets E. Alves; J. Zrake; F. Fiuza 106.14. Time-Dependent, Multi-Wavelength Models for Active Flares 6:00 PM-7:30 PM of Blazars M. Baring; M. Boettcher 106.15. Confronting UFO Models through Correlation Analysis in 6:00 PM-7:30 PM AGNs K. Fukumura; D. Kazanas; C.