Characterization of variability in blazar light curves
Sign Up to like & getrecommendations! Published in 2020 at "Astronomische Nachrichten"
DOI: 10.1002/asna.202013731
Abstract: Blazars represent dominant population of the extragalactic $\gamma$-ray sources in the Universe. These sources exhibit some characteristic properties like strong and non-thermal continuum emission over the entire electromagnetic spectrum from radio to TeV $\gamma$-rays with… read more here.
Keywords: variability blazar; light curves; characterization variability; variability ... See more keywords
An application of hierarchical Gaussian processes to the detection of anomalies in star light curves
Sign Up to like & getrecommendations! Published in 2019 at "Neurocomputing"
DOI: 10.1016/j.neucom.2018.11.087
Abstract: Abstract This study is concerned with astronomical time-series called light-curves that represent the brightness of celestial objects over a period of time. We consider the task of finding anomalous light-curves of periodic variable stars. We… read more here.
Keywords: application hierarchical; processes detection; gaussian processes; hierarchical gaussian ... See more keywords
NSVS 7051868: A system in a key evolutionary stage. First multi-color photometric study
Sign Up to like & getrecommendations! Published in 2017 at "New Astronomy"
DOI: 10.1016/j.newast.2016.07.010
Abstract: Abstract The first CCD photometric complete light curves of the eclipsing binary NSVS 7051868 were obtained during six nights in January 2016 in the B, V and Ic bands using the 0.25 m telescope of the… read more here.
Keywords: system; light curves; system key; 7051868 system ... See more keywords
The relentless variability of Mrk 421 from the TeV to the radio
Sign Up to like & getrecommendations! Published in 2021 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/201935557
Abstract: Context. The origin of the γ-ray emission of the blazar Mrk 421 is still a matter of debate. Aims. We used 5.5 years of unbiased observing campaign data, obtained using the FACT telescope and the… read more here.
Keywords: light curves; variability mrk; radio; relentless variability ... See more keywords
Simulations of starspot anomalies within TESS exoplanetary transit light curves
Sign Up to like & getrecommendations! Published in 2021 at "Astronomy and Astrophysics"
DOI: 10.1051/0004-6361/202038261
Abstract: Aims. We determine the starspot detection rate in exoplanetary transit light curves for M and K dwarf stars observed by the Transiting Exoplanet Survey Satellite (TESS) using various starspot filling factors and starspot distributions. Methods.… read more here.
Keywords: exoplanetary transit; light curves; transit light; dwarf ... See more keywords
Photometric investigation on the W-subtype contact binary V1197 Her
Sign Up to like & getrecommendations! Published in 2020 at "Research in Astronomy and Astrophysics"
DOI: 10.1088/1674-4527/20/1/10
Abstract: Multi-color light curves of V1197 Her were obtained with the 2.4 meter optical telescope at Thai National Observatory and the Wilson-Devinney (W-D) program is used to model the observational light curves. The photometric solutions reveal… read more here.
Keywords: primary star; star; contact; odot odot ... See more keywords
Merging strangeon stars II: the ejecta and light curves
Sign Up to like & getrecommendations! Published in 2021 at "Research in Astronomy and Astrophysics"
DOI: 10.1088/1674-4527/21/10/250
Abstract: The state of supranuclear matter in compact stars remains puzzling, and it is argued that pulsars could be strangeon stars. The consequences of merging double strangeon stars are worth exploring, especially in the new era… read more here.
Keywords: ejecta light; astronomy; merging double; strangeon stars ... See more keywords
Early light curves of Type II supernovae interacting with a circumstellar disc
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa2360
Abstract: Type II supernovae (SNe) interacting with disklike circumstellar matter (CSM) have been suggested as an explanation of some unusual Type II SNe, e.g., the so-called "impossible" SN, iPTF14hls. There are some radiation hydrodynamics simulations for… read more here.
Keywords: light curves; type supernovae; csm disk; sne ... See more keywords
Unsupervised machine learning for transient discovery in deeper, wider, faster light curves
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa2395
Abstract: Identification of anomalous light curves within time-domain surveys is often challenging. In addition, with the growing number of wide-field surveys and the volume of data produced exceeding astronomers ability for manual evaluation, outlier and anomaly… read more here.
Keywords: transient discovery; deeper wider; wider faster; light curves ... See more keywords
The influence of line opacity treatment in stella on supernova light curves
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa2704
Abstract: We systematically explore the effect of the treatment of line opacity on supernova light curves. We find that it is important to consider line opacity for both scattering and absorption (i.e. thermalisation which mimics the… read more here.
Keywords: supernova light; line opacity; stella; light curves ... See more keywords
Characterization of optical light curves of extreme variability quasars over a ∼16-yr baseline
Sign Up to like & getrecommendations! Published in 2020 at "Monthly Notices of the Royal Astronomical Society"
DOI: 10.1093/mnras/staa972
Abstract: We study the optical light curves - primarily probing the variable emission from the accretion disk - of ~ 900 extreme variability quasars (EVQs, with maximum flux variations more than 1 mag) over an observed-frame… read more here.
Keywords: term; light curves; optical light; long term ... See more keywords