Outputs (6)

Gaia Cepheid parallaxes and ‘Local Hole’ relieve H0 tension (2018)
Journal Article
Shanks, T., Hogarth, L., & Metcalfe, N. (2019). Gaia Cepheid parallaxes and ‘Local Hole’ relieve H0 tension. Monthly Notices of the Royal Astronomical Society: Letters, 484(1), L64-L68. https://doi.org/10.1093/mnrasl/sly239

There is an ≈9 ± 2.5 per cent tension between the value of Hubble’s Constant, H0 = 67.4 ± 0.5 km s−1 Mpc−1, implied by the Planck microwave background power spectrum and that given by the distance scale of H0 = 73.4 ± 1.7 km s−1Mpc−1. But with a plau... Read More about Gaia Cepheid parallaxes and ‘Local Hole’ relieve H0 tension.

Is every strong lens model unhappy in its own way? Uniform modelling of a sample of 13 quadruply+ imaged quasars (2018)
Journal Article
Shajib, A., Birrer, S., Treu, T., Auger, M., Agnello, A., Anguita, T., Buckley-Geer, E., Chan, J., Collett, T., Courbin, F., Fassnacht, C., Frieman, J., Kayo, I., Lemon, C., Lin, H., Marshall, P., McMahon, R., More, A., Morgan, N., Motta, V., …Walker, A. (2019). Is every strong lens model unhappy in its own way? Uniform modelling of a sample of 13 quadruply+ imaged quasars. Monthly Notices of the Royal Astronomical Society, 483(4), 5649-5671. https://doi.org/10.1093/mnras/sty3397

Strong-gravitational lens systems with quadruply imaged quasars (quads) are unique probes to address several fundamental problems in cosmology and astrophysics. Although they are intrinsically very rare, ongoing and planned wide-field deep-sky survey... Read More about Is every strong lens model unhappy in its own way? Uniform modelling of a sample of 13 quadruply+ imaged quasars.

Detection significance of baryon acoustic oscillations peaks in galaxy and quasar clustering (2018)
Journal Article
Ansarinejad, B., & Shanks, T. (2018). Detection significance of baryon acoustic oscillations peaks in galaxy and quasar clustering. Monthly Notices of the Royal Astronomical Society, 479(3), 4091-4107. https://doi.org/10.1093/mnras/sty1740

We compare our analysis of the baryon acoustic oscillations (BAO) feature in the correlation functions of SDSS BOSS DR12 LOWZ and CMASS galaxy samples with previous literature results. Using subsets of the data we obtain an empirical estimate of the... Read More about Detection significance of baryon acoustic oscillations peaks in galaxy and quasar clustering.

Cosmic dance at z ~ 3: Detecting the host galaxies of the dual AGN system LBQS 0302–0019 and Jil with HAWK-I+GRAAL (2018)
Journal Article
Husemann, B., Bielby, R., Jahnke, K., Arrigoni-Battaia, F., Worseck, G., Shanks, T., …Scholtz, J. (2018). Cosmic dance at z ~ 3: Detecting the host galaxies of the dual AGN system LBQS 0302–0019 and Jil with HAWK-I+GRAAL. Astronomy & Astrophysics, 614, Article L2. https://doi.org/10.1051/0004-6361/201833363

We recently discovered that the luminous radio-quiet quasi-stellar objects (QSO) LBQS 0302–0019 at z = 3.286 is likely accompanied by an obscured AGN at 20 kpc projected distance, which we dubbed Jil. It represents the tightest candidate system of an... Read More about Cosmic dance at z ~ 3: Detecting the host galaxies of the dual AGN system LBQS 0302–0019 and Jil with HAWK-I+GRAAL.

Quasars Probing Quasars. X. The Quasar Pair Spectral Database (2018)
Journal Article
Findlay, J. R., Prochaska, J. X., Hennawi, J. F., Fumagalli, M., Myers, A. D., Bartle, S., Chehade, B., DiPompeo, M. A., Shanks, T., Lau, M. W., & Rubin, K. H. (2018). Quasars Probing Quasars. X. The Quasar Pair Spectral Database. Astrophysical Journal Supplement, 236(2), Article 44. https://doi.org/10.3847/1538-4365/aabee5

The rare close projection of two quasars on the sky provides the opportunity to study the host galaxy environment of a foreground quasar in absorption against the continuum emission of a background quasar. For over a decade the "Quasars probing quasa... Read More about Quasars Probing Quasars. X. The Quasar Pair Spectral Database.

Discovery of a dual AGN at z ≃ 3.3 with 20 kpc separation (2018)
Journal Article
Husemann, B., Worseck, G., Arrigoni Battaia, F., & Shanks, T. (2018). Discovery of a dual AGN at z ≃ 3.3 with 20 kpc separation. Astronomy & Astrophysics, 610, Article L7. https://doi.org/10.1051/0004-6361/201732457

A prediction of the current paradigm of the hierarchical assembly of galaxies is the presence of supermassive dual black holes at separations of a few kpc or less. In this context, we report the detection of a narrow-line emitter within the extended... Read More about Discovery of a dual AGN at z ≃ 3.3 with 20 kpc separation.