Search Publications
SPIDERS: overview of the X-ray galaxy cluster follow-up and the final spectroscopic data release
Finoguenov, A.; Salvato, M.; Merloni, A. +19 more
SPIDERS (The SPectroscopic IDentification of eROSITA Sources) is a large spectroscopic programme for X-ray selected galaxy clusters as part of the Sloan Digital Sky Survey-IV (SDSS-IV). We describe the final data set in the context of SDSS Data Release 16 (DR16): the survey overall characteristics, final targeting strategies, achieved completeness…
V1460 Her: a fast spinning white dwarf accreting from an evolved donor star
Thorstensen, John R.; Gänsicke, B. T.; Pala, A. F. +6 more
We present time-resolved optical and ultraviolet (UV) spectroscopy and photometry of V1460 Her, an eclipsing cataclysmic variable with a 4.99-h orbital period and an overluminous K5-type donor star. The optical spectra show emission lines from an accretion disc along with absorption lines from the donor. We use these to measure radial velocities, …
HST/WFC3 grism observations of z ∼ 1 clusters: evidence for evolution in the mass-size relation of quiescent galaxies from post-starburst galaxies
Demarco, R.; Brammer, G. B.; Matharu, J. +10 more
Minor mergers have been proposed as the driving mechanism for the size growth of quiescent galaxies with decreasing redshift. The process whereby large star-forming galaxies quench and join the quiescent population at the large size end has also been suggested as an explanation for this size growth. Given the clear association of quenching with cl…
A complete view of the outskirts of the Coma cluster
Walker, S. A.; Mirakhor, M. S.
We present a new extended XMM-Newton mosaic of the nearby Coma cluster, which covers the cluster out to the virial radius with nearly complete azimuthal coverage. This large mosaic is combined with the Planck Sunyaev Zel'dovich effect observations to recover the thermodynamic properties of the intracluster medium in an azimuthally averaged profile…
Updated theoretical period-age and period-age-colour relations for Galactic Classical Cepheids: an application to the Gaia DR2 sample
Marconi, Marcella; Molinaro, Roberto; Ripepi, Vincenzo +4 more
Updated evolutionary and pulsational model predictions are combined in order to interpret the properties of Galactic Classical Cepheids in the Gaia Data Release 2. In particular, the location of the instability strip boundaries and the analytical relations connecting pulsation periods to the intrinsic stellar parameters are combined with evolution…
Lyman Continuum Escape Fraction from Low-mass Starbursts at z = 1.3
Teplitz, Harry I.; Scarlata, Claudia; Henry, Alaina +8 more
We present a new constraint on the Lyman continuum (LyC) escape fraction at $z\sim 1.3$ . We obtain deep, high sensitivity far-UV imaging with the Advanced Camera for Surveys Solar Blind Channel on the Hubble Space Telescope, targeting 11 star-forming galaxies at 1.2 < z < 1.4. The galaxies are selected from the 3D-HST survey to have high Hα…
The X-ray view of merger-induced active galactic nuclei activity at low redshift
Ellison, Sara L.; Blecha, Laura; Satyapal, Shobita +1 more
Galaxy mergers are predicted to trigger accretion on to the central supermassive black holes, with the highest rates occurring during final coalescence. Previously, we have shown elevated rates of both optical and mid-IR selected active galactic nuclei (AGNs) in post-mergers, but to date the prevalence of X-ray AGNs has not been examined in the sa…
X-ray spectroscopy of the γ-ray brightest nova V906 Car (ASASSN-18fv)
Strader, Jay; Chomiuk, Laura; Ness, Jan-Uwe +15 more
Shocks in γ-ray emitting classical novae are expected to produce bright thermal and non-thermal X-rays. We test this prediction with simultaneous NuSTAR and Fermi/LAT observations of nova V906 Car, which exhibited the brightest GeV γ-ray emission to date. The nova is detected in hard X-rays while it is still γ-ray bright, but contrary to simple th…
The slow demise of the long-lived SN 2005ip
Van Dyk, Schuyler D.; Filippenko, Alexei V.; Kilpatrick, Charles D. +16 more
The Type IIn supernova (SN IIn) 2005ip is one of the most well-studied and long-lasting examples of an SN interacting with its circumstellar environment. The optical light curve plateaued at a nearly constant level for more than five years, suggesting ongoing shock interaction with an extended and clumpy circumstellar medium (CSM). Here, we presen…
The Gemini Planet Imager View of the HD 32297 Debris Disk
Matthews, Brenda C.; Duchêne, Gaspard; Esposito, Thomas M. +61 more
We present new H-band scattered light images of the HD 32297 edge-on debris disk obtained with the Gemini Planet Imager. The disk is detected in total and polarized intensity down to a projected angular separation of 0"15, or 20 au. On the other hand, the large-scale swept-back halo remains undetected, likely a consequence of its markedly blue col…