Recent Submissions

  • A deep search for the host galaxies of gamma-ray bursts with no detected optical afterglow 

    Rossi, Andrea; Klose, Sylvio; Ferrero, Patrizia; Greiner, Jochen; Arnold, Laura A.; Gonsalves, E. E.; Hartmann, Dieter H H; Updike, Adria C.; Kann, Davidalexander; Krühler, Thomas (2012-09)
    Context. Gamma-ray bursts (GRBs) can provide information about star formation at high redshifts. Even in the absence of a bright optical/near-infrared/radio afterglow, the high detection rate of X-ray afterglows by Swift/XRT ...
  • The evolution of ultracompact X-ray binaries 

    van Haaften, Lennart M.; Nelemans, Gijs A.; Voss, Rasmus; Wood, Matt A.; Kuijpers, Jan (2012-01)
    Context. Ultracompact X-ray binaries (UCXBs) typically consist of a white dwarf donor and a neutron star or black hole accretor. The evolution of UCXBs and very low mass ratio binaries in general is poorly understood. In ...
  • The 72-h WEBT microvariability observation of blazar S5 0716+714 in 2009 

    Bhatta, G.; Webb, James R.; Hollingsworth, H.; Dhalla, S.; Khanuja, A.; Bachev, Rumen S.; Blinov, Dmitry A.; Böttcher, Markus; Bravo Calle, O. J A; Vennes, Stéphane (2013-10-10)
    Context. The international Whole Earth Blazar Telescope (WEBT) consortium planned and carried out three days of intensive micro-variability observations of S5 0716+714 from February 22, 2009 to February 25, 2009. This ...
  • The rapidly pulsating subdwarf B star PG 1325+101 II. Structural parameters from asteroseismology 

    Charpinet, Stéphane; Silvotti, R.; Bonanno, Alfio M.; Fontaine, G.; Brassard, Pierre; Chayer, Pierre; Green, Elizabeth M.; Oswalt, T. D.; Rudkin, Mark J.; Johnston, Kyle B. (2006-11)
    We present a detailed analysis of the rapidly pulsating subdwarf B star (or EC14026 star) PG 1325+101. This analysis exploits the outcome of dedicated multisite observations using time-series photometry that revealed the ...
  • The rapidly pulsating subdwarf B star PG 1325+101 I. Oscillation modes from multisite observations 

    Silvotti, R.; Bonanno, Alfio M.; Bernabei, Stefano; Fontaine, G.; Charpinet, Stéphane; Leccia, Silvio; Kjeldsen, Hans; Oswalt, T. D.; Rudkin, Mark J.; Johnston, Kyle B. (2006-11)
    In this article we present the results of 215 h of time-series photometry on the rapidly pulsating subdwarf B star PG 1325+101 (Teff - 35 000 K, log g = 5.8, log N(Hs)/N(H) = -1.7), obtained during 25 days of observation ...
  • The temporal spectrum of the sdB pulsating star HS 2201+2610 at 2 ms resolution 

    Silvotti, R.; Janulis, Rimvydas; Schüh, Sonja L.; Charpinet, Stéphane; Oswalt, T. D.; Silvestri, Nicole M.; González-Pérez, J. M.; Kalytis, Romualdas; Meištas, E. G.; Carlson, Glenn (2002-07)
    In this article we present the results of more than 180 hours of time-series photometry on the low gravity (log g = 5.4, Teff = 29 300 K, log He/H = -3.0 by number) sdB pulsating star HS 2201+2610, obtained between September ...
  • BPM 24754: A new southern ZZ Ceti star 

    Giovannini, Odilon; Kepler, Souza Oliveira; Kanaan, Antonio; Costa, Andrea F Murillo; Koester, Detlev (1998-01)
    We report the discovery of a new long-period ZZ Ceti star through the analysis of photometric time series gathere on 7 nights between 1995 and 1996. The light curve displays a periodic variation with a period of ∼ 18 min ...
  • The δ Scuti star FG Virginis II. A search for high pulsation frequencies 

    Breger, Michel; Handler, Gerald; Serkowitsch, E.; Reegen, Piet; Provençal, Judith L.; Wood, Matt A.; Clemens, J. Christopher; O'Brien, Marlea Sean; Winget, Don Earl; Nather, R. Edward (1996-05)
    Although the δ Scuti and roAp variables occupy similar positions on and near the main sequence, δ Scuti variables pulsate with lower radial and nonradial overtones and lower frequencies. To test whether high frequencies ...
  • Timing and locations of reef fish spawning off the southeastern United States 

    Farmer, Nicholas A.; Heyman, William D.; Karnauskas, Mandy; Kobara, Shinichi; Smart, Tracey I.; Ballenger, Joseph C.; Reichert, Marcel J M; Wyanski, David M.; Tishler, Michelle S.; Lindeman, Kenyon C. (2017-03-06)
    Managed reef fish in the Atlantic Ocean of the southeastern United States (SEUS) support a multi-billion dollar industry. There is a broad interest in locating and protecting spawning fish from harvest, to enhance productivity ...
  • ARRAKIS: atlas of resonance rings as known in the S⁴G 

    Comerón, Sébastien; Salo, Heikki J.; Laurikainen, Eija; Knapen, Johan H.; Buta, Ronald J.; Herrera-Endoqui, M.; Laine, Jarkko; Holwerda, Benne Willem; Sheth, Kartik; Mizusawa, Trisha (2014-02)
    Context. Resonance rings and pseudorings (here collectively called rings) are thought to be related to the gathering of material near dynamical resonances caused by non-axisymmetries in galaxy discs. This means that they ...
  • Emission lines properties of the radio-loud quasar LAMOST J1131+3114 

    Shi, Zhixin; Comte, Georges; Luo, Ali; Zhao, Yuehong; Zhao, Jingkun; Oswalt, T. D.; Wu, Fuchao (2014-04)
    The radio-loud quasar LAMOST J1131+3114 (Ton 580, B2 1128+315), showing asymmetrical profile in Hβ and [O III] lines, has been selected from the LAMOST Pilot Survey for further study. We present an analysis of its emission ...
  • Extended warm gas in the ULIRG Mrk273: Galactic outflows and tidal debris 

    Rodríguez Zaurín, Javier; Tadhunter, Clive N.; Rupke, David S N; Veilleux, Sylvain; Spoon, Henrik W W; Chiaberge, Marco; Ramos Almeida, Cristina; Batcheldor, Dan; Sparks, William B. (2014-11)
    We present new HST/ACS medium-and narrow-band images and optical Isaac Newton Telescope long-slit spectra of the merging system Mrk273. The HST observations sample the [OIII]λλ4959,5007 emission from the galaxy and the ...
  • Evidence of magnetic field decay in massive main-sequence stars 

    Fossati, Luca; Schneider, Fabian R N; Castro, Norberto; Langer, Norbert; Simón-Díaz, Sergio; Müller, André Luís; De Koter, Alex; Morel, Thierry; Petit, Véronique; Sana, Hugues (2016-08)
    A significant fraction of massive main-sequence stars show strong, large-scale magnetic fields. The origin of these fields, their lifetimes, and their role in shaping the characteristics and evolution of massive stars are ...
  • The puzzling properties of the magnetic O star Tr16-22 

    Nazé, Yaël; Barbá, Rodolfo H.; Bagnulo, Stefano; Morrell, Nidia I.; Gamen, Roberto C.; Petit, Véronique; Neiner, Coralie (2016-12)
    Context. The detection of bright, hard, and variable X-ray emission in Tr16-22 prompted spectropolarimetric observations of this star, which in turn led to the discovery of a surface magnetic field. Aims. We want ...
  • Multisite observations of the PMS δ Scuti star V351 Ori 

    Ripepi, Vincenzo; Marconi, Marcella; Bernabei, Stefano; Palla, Francesco; Pinheiro, F. J G; Folha, Daniel F M; Oswalt, T. D.; Terranegra, L.; Rudkin, Mark J.; Johnston, Kyle B. (2003-09)
    We present the results of multisite observations spanning two years on the pre-main-sequence (PMS) star V351 Ori. A total of around 180 hours of observations over 29 nights have been collected, allowing us to measure five ...
  • 2MASS J0516288+260738: Discovery of the first eclipsing late K + Brown dwarf binary system? 

    Schüh, Sonja L.; Handler, Gerald; Drechsel, Horst; Hauschildt, Peter H.; Dreizler, Stefan; Medupe, R.; Karl, C. A.; Napiwotzki, Ralf; Kim, Seunglee; Wood, Matt A. (2003-11)
    We report the discovery of a new eclipsing system less than one arcminute south of the pulsating DB white dwarf KUV 05134+2605 . The object could be identified with the point source 2MASS J0516288+260738 published by the ...
  • Observations of the pulsating white dwarf G 185-32 

    Castanheira, Bárbara Garcia; Kepler, Souza Oliveira; Moskalik, Paweł A.; Zoła, Stanislaw; Pajdosz, G.; Krzensiński, J.; O'Donoghue, Darragh E.; Katz, Marshall E.; Buckley, David A H; Wood, Matt A. (2004-01)
    We observed the pulsating hydrogen atmosphere white dwarf G 185-32 with the Whole Earth Telescope in 1992. We report on a weighted Fourier transform of the data detecting 18 periodicities in its light curve. Using the ...
  • Whole Earth telescope observations of the ZZ Ceti star HL Tau 76 

    Dolez, Noël; Vauclair, Gérard P.; Kleinman, Scot J.; Chevreton, M.; Fu, Jianning; Solheim, Jan Erik; Pérez, Jaime M González; Wood, Matt A.; Ahrens, Thomas J.; Silvestri, Nicole M. (2006-01)
    This paper analyses the Whole Earth Telescope observations of HL Tau 76, the first discovered pulsating DA white dwarf. The star was observed during two Whole Earth Telescope campaigns. It was a second priority target ...
  • The pulsation modes of the pre-white dwarf PG 1159-035 

    Costa, Jörge E S; Kepler, Souza Oliveira; Winget, Don Earl; O'Brien, Marlea Sean; Kawaler, Steven D.; Costa, Andrea F Murillo; Giovannini, Odilon; Kanaan, Antonio; Wood, Matt A.; Ahrens, Thomas J. (2008-01)
    Context. PG 1159-035 , a pre-white dwarf with Teff ≃ 140 000 K, is the prototype of both two classes: the PG 1159 spectroscopic class and the DOV pulsating class. Previous studies of PG 1159-035 photometric data obtained ...
  • A multisite photometric campaign on the pre-main-sequence δ Scuti pulsator IP Persei 

    Ripepi, Vincenzo; Bernabei, Stefano; Marconi, Marcella; Palla, Francesco; Ferro, Armando Arellano; Bonanno, Alfio M.; Ferrara, P.; Frasca, Antonio; Jiang, Xiaojun; Oswalt, T. D. (2006-04)
    We present the results of a photometric multisite campaign on the δ Scuti Pre-Main-Sequence star IP Per. Nine telescopes have been involved in the observations, with a total of about 190 h of observations over 38 nights. ...

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