Browsing by Author "Lucas, Philip"

Now showing items 1-11 of 11

    • The 2022–2023 accretion outburst of the young star V1741 Sgr 

      Kuhn, Michael; Hillenbrand, Lynnee A.; Connelley, Michael S.; Rich, R. Michael; Staels, Bart; Carvalho, Adolfo S.; Lucas, Philip; Fremling, Christoffer; Karambelkar, Viraj R.; Lee, Ellen; Ahumada, Tomás; Ishida, Emille E.~O.; De, Kishalay; de Souza, Rafael S.; Kasliwal, Mansi M. (2024-04-01)
      V1741 Sgr (= SPICY 71482/Gaia22dtk) is a Classical T Tauri star on the outskirts of the Lagoon Nebula. After at least a decade of stability, in mid-2022, the optical source brightened by ∼3 mag over 2 months, remained ...

    • Confirmation of a New Metal-poor Globular Cluster in the Galactic Bulge 

      Minniti, Dante; Lucas, Philip (2018-10-05)
      We use deep near-IR photometry of the VISTA Variables in the V'a L'ctea (VVV) Survey and deep DECam Plane Survey (DECaPS) optical photometry to confirm the physical reality of the candidate globular cluster (GC) Minni 22, ...

    • The Emergence of the Infrared transient VVV-WIT-06 

      Minniti, Dante; Saito, Roberto K.; Forster, F.; Pignata, G.; Ivanov, Valentin D.; Lucas, Philip; Beamin, J.C.; Borissova, Jura; Catelan, Marcio; Gonzalez, Oscar A.; Hempel, Maren; Hsiao, E; Kurtev, Radostin; Majaess, Daniel; Masetti, N.; Morrell, N.I.; Phillips, M.M.; Pullen, J. B.; Rejkuba, M.; Smith, L.C.; Surot, F.; Valenti, Elena; Zoccali, Manuela (2017-11-03)
      We report the discovery of an enigmatic large-amplitude (ΔKs> 10.5 mag) transient event in near-IR data obtained by the VISTA Variables in the Via Lactea (VVV) ESO Public Survey. The object (designated VVV-WIT-06) is located ...

    • The extinction law in the inner 3 × 3 deg 2of the Milky Way and the red clump absolute magnitude in the inner bar-bulge 

      Sanders, Jason L.; Smith, Leigh C.; González-Fernández, Carlos; Lucas, Philip; Minniti, Dante (2022-08-01)
      The extinction law from 0.9 to 8 microns in the inner 3x3 deg^2 of the Milky Way is measured using data from VISTA Variables in the Via Lactea, GLIMPSE and WISE. Absolute extinction ratios are found by requiring that the ...

    • The Milky Way bar/bulge in proper motions: a 3D view from VIRAC & Gaia 

      Clarke, Jonathan P.; Wegg, Christopher; Gerhard, Ortwin; Smith, Leigh C.; Lucas, Philip; Wylie, Shola M. (2019-11)
      We have derived absolute proper motions of the entire Galactic bulge region from VIRAC and Gaia. We present these as both integrated on-sky maps and, after isolating standard candle red clump (RC) stars, as a function of ...

    • A new near-IR window of low extinction in the Galactic plane 

      Minniti, Dante; Saito, Roberto K.; Gonzalez, Oscar A.; Alonso-García, Javier; Rejkuba, Marina; Barbá, Rodolfo; Irwin, Mike; Kammers, Roberto; Lucas, Philip; Majaess, Daniel; Valenti, Elena (2018-08-01)
      Aims. The windows of low extinction in the Milky Way (MW) plane are rare but important because they enable us to place structural constraints on the opposite side of the Galaxy, which has hither to been done rarely. Methods. ...

    • New VVV Survey Globular Cluster Candidates in the Milky Way Bulge 

      Minniti, Dante; Geisler, Douglas; Alonso-García, Javier; Palma, Tali; Beamin, Juan Carlos; Borissova, Jura; Catelan, Marcio; Clariá, Juan J.; Cohen, Roger E.; Ramos, Rodrigo Contreras; Dias, Bruno; Fernandez-Trincado, Jose; Gomez, Matias; Hempel, Maren; Ivanov, Valentin D.; Kurtev, Radostin; Lucas, Philip; Moni-Bidin, Christian; Pullen, Joyce; Alegría, Sebastian Ramírez; Saito, Roberto K.; Valenti, Elena (2017-11-10)
      It is likely that a number of Galactic globular clusters remain to be discovered, especially toward the Galactic bulge. High stellar density combined with high and differential interstellar reddening are the two major ...

    • Open cluster candidates in the VVVX area: VVVX CL 076 and CL 077 

      Borissova, Jura; Ivanov, Valentin D.; Lucas, Philip; Kurtev, R.; Alonso-Garcia, J.; Alegria, S. Ramirez; Minniti, D.; Medina, Nicolás; Chene, Andre Nicolas (2019-08-01)
      We are reporting some basic parameters of two newly discovered clusters, VVVX CL 076 and CL 077, recently discovered in the galactic disk area covered by the VISTA Variables in the Via Lactea eXtended (VVVX) ESO Public ...

    • Self-consistent modelling of the Milky Way's Nuclear Stellar Disc 

      Sormani, Mattia C.; Sanders, Jason L.; Fritz, Tobias K.; Smith, Leigh C.; Gerhard, Ortwin; Schoedel, Rainer; Magorrian, John; Neumayer, Nadine; Nogueras-Lara, Francisco; Feldmeier-Krause, Anja; Mastrobuono-Battisti, Alessandra; Schultheis, Mathias; Shahzamanian, Banafsheh; Vasiliev, Eugene; Klessen, Ralf S.; Lucas, Philip; Minniti, Dante (2022-03-22)
      The Nuclear Stellar Disc (NSD) is a flattened high-density stellar structure that dominates the gravitational field of the Milky Way at Galactocentric radius $30\lesssim R\lesssim 300$ pc. We construct axisymmetric ...

    • Transverse kinematics of the Galactic bar-bulge from VVV and Gaia 

      Sanders, Jason L.; Smith, Leigh; Evans, N. Wyn; Lucas, Philip (2019-08)
      We analyse the kinematics of the Galactic bar-bulge using proper motions from the ESO public survey Vista Variables in the Via Lactea (VVV) and the second Gaia data release. Gaia has provided some of the first absolute ...

    • Variable star classification across the Galactic bulge and disc with the VISTA Variables in the Vía Láctea survey 

      Molnar, Thomas A.; Sanders, Jason L.; Smith, Leigh C.; Belokurov, Vasily; Lucas, Philip; Minniti, Dante (2021-10-30)
      We present VIVACE, the VIrac VAriable Classification Ensemble, a catalogue of variable stars extracted from an automated classification pipeline for the Vista Variables in the V\'ia L\'actea (VVV) infrared survey of the ...