Search Publications
The late-time light curve of the Type Ia supernova SN 2011fe
Gal-Yam, A.; Sullivan, M.; Nugent, P. +10 more
We present late-time optical R-band imaging data from the Palomar Transient Factory (PTF) for the nearby Type Ia supernova SN 2011fe. The stacked PTF light curve provides densely sampled coverage down to R ≃ 22 mag over 200-620 d past explosion. Combining with literature data, we estimate the pseudo-bolometric light curve for this event from 200 t…
Diagnosing galactic feedback with line broadening in the low-redshift Lyα forest
Viel, Matteo; Wakker, Bart P.; Kim, Tae-Sun +4 more
We compare the low-redshift (z ≃ 0.1) Lyα forest from hydrodynamical simulations with data from the Cosmic Origins Spectrograph. We find the tension between the observed number of lines with b-parameters in the range of 25-45 km s-1 and the predictions from simulations that incorporate either vigorous feedback from active galactic nucle…
Super-Eddington QSO RX J0439.6-5311 - II. Multiwavelength constraints on the global structure of the accretion flow
Done, Chris; Ward, Martin; Jin, Chichuan +1 more
We present a detailed multiwavelength study of an unobscured, highly super-Eddington Type-1 QSO RX J0439.6-5311. We combine the latest XMM-Newton observation with all archival data from infrared to hard X-rays. The optical spectrum is very similar to that of 1H 0707-495 in having extremely weak [O III] and strong Fe II emission lines, although the…
Complexes of triggered star formation in supergiant shell of Holmberg II
Egorov, Oleg V.; Lozinskaya, Tatiana A.; Moiseev, Alexei V. +1 more
We report a detailed analysis of all regions of current star formation in the walls of the supergiant H I shell (SGS) in the galaxy Holmberg II based on observations with a scanning Fabry-Perot interferometer at the Russian 6-m telescope. We compare the structure and kinematics of ionized gas with that of atomic hydrogen and with the stellar popul…
WASP-167b/KELT-13b: joint discovery of a hot Jupiter transiting a rapidly rotating F1V star
Queloz, D.; Ségransan, D.; Collier Cameron, A. +46 more
We report the joint WASP/KELT discovery of WASP-167b/KELT-13b, a transiting hot Jupiter with a 2.02-d orbit around a V = 10.5, F1V star with [Fe/H] = 0.1 ± 0.1. The 1.5 RJup planet was confirmed by Doppler tomography of the stellar line profiles during transit. We place a limit of <8 MJup on its mass. The planet is in a re…
Lyman continuum leaking AGN in the SSA22 field
Inoue, Akio K.; Iwata, Ikuru; Micheva, Genoveva
Subaru/SuprimeCam narrow-band photometry of the SSA22 field reveals the presence of four Lyman continuum (LyC) candidates among a sample of 14 active galactic nuclei (AGNs). Two show offsets and likely have stellar LyCin nature or are foreground contaminants. The remaining two LyC candidates are type I AGN. We argue that the average LyC escape fra…
Morpho-kinematics of z ∼ 1 galaxies probe the hierarchical scenario
Flores, H.; Hammer, F.; Puech, M. +2 more
We have studied a representative sample of intermediate-mass galaxies at z ∼ 1, observed by the kinematic survey KMOS3D. We have re-estimated the kinematical parameters from the published kinematic maps and analysed photometric data from Hubble Space Telescope (HST) to measure optical disc inclinations and Position Angle. We find that o…
The ACS survey of Galactic globular clusters - XIV. Bayesian single-population analysis of 69 globular clusters
Anderson, J.; Jefferys, W. H.; Stenning, D. C. +7 more
We use Hubble Space Telescope (HST) imaging from the ACS Treasury Survey to determine fits for single population isochrones of 69 Galactic globular clusters. Using robust Bayesian analysis techniques, we simultaneously determine ages, distances, absorptions and helium values for each cluster under the scenario of a 'single' stellar population on m…
SPIDERS: selection of spectroscopic targets using AGN candidates detected in all-sky X-ray surveys
Georgakakis, A.; Salvato, M.; Buchner, J. +19 more
SPIDERS (SPectroscopic IDentification of eROSITA Sources) is a Sloan Digital Sky Survey IV (SDSS-IV) survey running in parallel to the Extended Baryon Oscillation Spectroscopic Survey (eBOSS) cosmology project. SPIDERS will obtain optical spectroscopy for large numbers of X-ray-selected active galactic nuclei (AGN) and galaxy cluster members detec…
Constraining neutrino mass and extra relativistic degrees of freedom in dynamical dark energy models using Planck 2015 data in combination with low-redshift cosmological probes: basic extensions to ΛCDM cosmology
Zhang, Jing-Fei; Zhang, Xin; Li, Yun-He +1 more
We investigate how the properties of dark energy affect the cosmological measurements of neutrino mass and extra relativistic degrees of freedom. We limit ourselves to the most basic extensions of Λ cold dark matter (CDM) model, I.e. the wCDM model with one additional parameter w, and the w0waCDM model with two additional par…