Time-domain astronomy

Time-domain astronomy is the study of how astronomical objects change with time. Changes may be due to movement or physical changes in the object itself. Examples include pulsar variability, and the variability of accreting black holes, variable stars, and the Sun. This term includes both theoretical and observational studies of the time-dependent behaviour of astronomical objects.

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Latest Research and Reviews

  • Research |

    Two sources of variability are reported in extreme horizontal branch (EHB) stars found in globular clusters, both related to the action of weak magnetic fields: large surface spots and very energetic flares. EHB stars in clusters can thus be linked to EHB field stars, and beyond, to other stars with radiative envelopes.

    • Y. Momany
    • , S. Zaggia
    • , M. Montalto
    • , D. Jones
    • , H. M. J. Boffin
    • , S. Cassisi
    • , C. Moni Bidin
    • , M. Gullieuszik
    • , I. Saviane
    • , L. Monaco
    • , E. Mason
    • , L. Girardi
    • , V. D’Orazi
    • , G. Piotto
    • , A. P. Milone
    • , H. Lala
    • , P. B. Stetson
    •  & Y. Beletsky
  • Research |

    The pulsation spectra of intermediate-mass stars (so-called δ Scuti stars) have been challenging to analyse, but new observations of 60 such stars reveal remarkably regular sequences of high-frequency pulsation modes.

    • Timothy R. Bedding
    • , Simon J. Murphy
    • , Daniel R. Hey
    • , Daniel Huber
    • , Tanda Li
    • , Barry Smalley
    • , Dennis Stello
    • , Timothy R. White
    • , Warrick H. Ball
    • , William J. Chaplin
    • , Isabel L. Colman
    • , Jim Fuller
    • , Eric Gaidos
    • , Daniel R. Harbeck
    • , J. J. Hermes
    • , Daniel L. Holdsworth
    • , Gang Li
    • , Yaguang Li
    • , Andrew W. Mann
    • , Daniel R. Reese
    • , Sanjay Sekaran
    • , Jie Yu
    • , Victoria Antoci
    • , Christoph Bergmann
    • , Timothy M. Brown
    • , Andrew W. Howard
    • , Michael J. Ireland
    • , Howard Isaacson
    • , Jon M. Jenkins
    • , Hans Kjeldsen
    • , Curtis McCully
    • , Markus Rabus
    • , Adam D. Rains
    • , George R. Ricker
    • , Christopher G. Tinney
    •  & Roland K. Vanderspek
    Nature 581, 147-151
  • Research |

    A recent supernova event, SN2016aps, must have involved an extremely energetic explosion and a very massive star, potentially indicating a pair-instability supernova or pulsational pair-instability supernova mechanism.

    • Matt Nicholl
    • , Peter K. Blanchard
    • , Edo Berger
    • , Ryan Chornock
    • , Raffaella Margutti
    • , Sebastian Gomez
    • , Ragnhild Lunnan
    • , Adam A. Miller
    • , Wen-fai Fong
    • , Giacomo Terreran
    • , Alejandro Vigna-Gómez
    • , Kornpob Bhirombhakdi
    • , Allyson Bieryla
    • , Pete Challis
    • , Russ R. Laher
    • , Frank J. Masci
    •  & Kerry Paterson
  • Research |

    Simultaneous optical and gamma-ray observations of nova V906 Carinae reveal correlated flares in both wavelength ranges that can be linked to shocks in the nova ejecta. Weak X-ray emission suggests that the shocks are deeply embedded, but they contribute substantially to the luminosity of the nova.

    • Elias Aydi
    • , Kirill V . Sokolovsky
    • , Laura Chomiuk
    • , Elad Steinberg
    • , Kwan Lok Li
    • , Indrek Vurm
    • , Brian D. Metzger
    • , Jay Strader
    • , Koji Mukai
    • , Ondřej Pejcha
    • , Ken J. Shen
    • , Gregg A. Wade
    • , Rainer Kuschnig
    • , Anthony F. J. Moffat
    • , Herbert Pablo
    • , Andrzej Pigulski
    • , Adam Popowicz
    • , Werner Weiss
    • , Konstanze Zwintz
    • , Luca Izzo
    • , Karen R. Pollard
    • , Gerald Handler
    • , Stuart D. Ryder
    • , Miroslav D. Filipović
    • , Rami Z. E. Alsaberi
    • , Perica Manojlović
    • , Raimundo Lopes de Oliveira
    • , Frederick M. Walter
    • , Patrick J. Vallely
    • , David A. H. Buckley
    • , Michael J. I. Brown
    • , Eamonn J. Harvey
    • , Adam Kawash
    • , Alexei Kniazev
    • , Christopher S. Kochanek
    • , Justin Linford
    • , Joanna Mikolajewska
    • , Paolo Molaro
    • , Marina Orio
    • , Kim L. Page
    • , Benjamin J. Shappee
    •  & Jennifer L. Sokoloski
  • Research |

    2M1510 is an approximately 45-million-year-old triple system of brown dwarfs, two of which form a close binary in a 20-day orbit and have almost the same mass (3.82% and 3.75% of the mass of the Sun, respectively). Their physical parameters are in good agreement with evolutionary models except for luminosity, suggesting that we might be underestimating the masses of brown dwarfs and massive exoplanets by about 30%.

    • Amaury H. M. J. Triaud
    • , Adam J. Burgasser
    • , Artem Burdanov
    • , Vedad Kunovac Hodžić
    • , Roi Alonso
    • , Daniella Bardalez Gagliuffi
    • , Laetitia Delrez
    • , Brice-Olivier Demory
    • , Julien de Wit
    • , Elsa Ducrot
    • , Frederic V. Hessman
    • , Tim-Oliver Husser
    • , Emmanuël Jehin
    • , Peter P. Pedersen
    • , Didier Queloz
    • , James McCormac
    • , Catriona Murray
    • , Daniel Sebastian
    • , Samantha Thompson
    • , Valérie Van Grootel
    •  & Michaël Gillon
  • Research |

    Radio observations of black hole MAXI J1820+070’s 2018 outburst captured an isolated radio flare that the authors connect with the launch of bipolar relativistic ejecta. Following the oncoming ejecta for more than half a year reveals that black hole jet energetics have been systematically underestimated.

    • J. S. Bright
    • , R. P. Fender
    • , S. E. Motta
    • , D. R. A. Williams
    • , J. Moldon
    • , R. M. Plotkin
    • , J. C. A. Miller-Jones
    • , I. Heywood
    • , E. Tremou
    • , R. Beswick
    • , G. R. Sivakoff
    • , S. Corbel
    • , D. A. H. Buckley
    • , J. Homan
    • , E. Gallo
    • , A. J. Tetarenko
    • , T. D. Russell
    • , D. A. Green
    • , D. Titterington
    • , P. A. Woudt
    • , R. P. Armstrong
    • , P. J. Groot
    • , A. Horesh
    • , A. J. van der Horst
    • , E. G. Körding
    • , V. A. McBride
    • , A. Rowlinson
    •  & R. A. M. J. Wijers

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