Now showing items 1-4 of 4

    • The binary fraction of planetary nebula central stars - III. the promise of VPHAS+ 

      Barker, Helen; Zijlstra, Albert; Marco, Orsola De; Frew, David J.; Drew, J. E.; Corradi, R. L. M.; Eislöffel, Jochen; Parker, Quentin A. (2018-04-21)
      The majority of planetary nebulae (PNe) are not spherical, and current single-star models cannot adequately explain all the morphologies we observe. This has led to the Binary Hypothesis, which states that PNe are ...
    • A survey for variable young stars with small telescopes – IX. Evolution of spot properties on YSOs in IC 5070 

      Herbert, Carys; Froebrich, Dirk; Vanaverbeke, Siegfried; Scholz, Aleks; Eislöffel, Jochen; Urtly, Thomas; Walton, Ivan L; Wiersema, Klaas; Quinn, Nick J; Piehler, Georg; Aimar, Mario Morales; García, Rafael Castillo; Vanmunster, Tonny; Alfaro, Francisco C Soldán; de la Cuesta, Faustino García; Licchelli, Domenico; Perez, Alex Escartin; Mañanes, Esteban Fernández; Ribes, Noelia Graciá; González, José Luis Salto; Futcher, Stephen R L; Nelson, Tim; Dvorak, Shawn; Moździerski, Dawid; Kotysz, Krzysztof; Mikołajczyk, Przemysław; Fleming, George; Phillips, Mark; Vale, Tony; Dubois, Franky; Eggenstein, Heinz-Bernd; Heald, Michael A; Lewin, Pablo; OKeeffe, Derek; Popowicz, Adam; Bernacki, Krzysztof; Malcher, Andrzej; Lasota, Slawomir; Fiolka, Jerzy; Dustor, Adam; Percy, Stephen C; Devine, Pat; Patel, Aashini L; Dickers, Matthew D; Dover, Lord; Grozdanova, Ivana I; Urquhart, James S; Lynch, Chris J R (2024-04-01)
      We present spot properties on 32 periodic young stellar objects in IC 5070. Long term, ∼5 yr, light curves in the V, R, and I-bands are obtained through the HOYS (Hunting Outbursting Young Stars) citizen science project. ...
    • Twenty-five Years of Accretion onto the Classical T Tauri Star TW Hya 

      Herczeg, Gregory J.; Chen, Yuguang; Donati, Jean-Francois; Dupree, Andrea K.; Walter, Frederick M.; Hillenbrand, Lynne A.; Johns-Krull, Christopher M.; Manara, Carlo F.; Günther, Hans Moritz; Fang, Min; Schneider, P. Christian; Valenti, Jeff A.; Alencar, Silvia H. P.; Venuti, Laura; Alcalá, Juan Manuel; Frasca, Antonio; Arulanantham, Nicole; Linsky, Jeffrey L.; Bouvier, Jerome; Brickhouse, Nancy S.; Calvet, Nuria; Espaillat, Catherine C.; Campbell-White, Justyn; Carpenter, John M.; Chang, Seok-Jun; Cruz, Kelle L.; Dahm, S. E.; Eislöffel, Jochen; Edwards, Suzan; Fischer, William J.; Guo, Zhen; Henning, Thomas; Ji, Tao; Jose, Jessy; Kastner, Joel H.; Launhardt, Ralf; Principe, David A.; Robinson, Connor E.; Serna, Javier; Siwak, Michal; Sterzik, Michael F.; Takasao, Shinsuke (2023-10-12)
      Accretion plays a central role in the physics that governs the evolution and dispersal of protoplanetary disks. The primary goal of this paper is to analyze the stability over time of the mass accretion rate onto TW Hya, ...
    • The VST photometric hα survey of the Southern Galactic Plane and Bulge (VPHAS+) 

      Drew, J.E.; González-Solares, Eduardo A.; Greimel, Robert; Irwin, M.J.; Küpcü Yoldaş, A.; Lewis, J.R.; Barentsen, Geert; Eislöffel, Jochen; Farnhill, Hywel J.; Martin, Bill; Walton, Nicholas A.; Mohr-Smith, M.; Raddi, Roberto; Sale, Stuart E.; Wright, Nicholas J.; Groot, Paul J.; Barlow, Michael J.; Corradi, R.L.M.; Drake, Jeremy J.; Fabregat, Juan; Frew, David J.; Gänsicke, Boris T.; Knigge, Christian; Mampaso, Antonio; Morris, R.A.H.; Naylor, Tim J.; Parker, Quentin A.; Phillipps, Steven; Ruhland, Christine; Steeghs, Danny T H; Unruh, Y.C.; Vink, Jorick S.; Wesson, Roger; Zijlstra, Albert (2014-05-21)
      The VST Photometric Hα Survey of the Southern Galactic Plane and Bulge (VPHAS+) is surveying the southern Milky Way in u, g, r, i and Hα at ~1 arcsec angular resolution. Its footprint spans the Galactic latitude range -5o ...