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Dr Russell Smith's Outputs (83)

HARMONI at ELT: project status and instrument overview (2024)
Presentation / Conference Contribution
Thatte, N. A., Melotte, D., Neichel, B., Le Mignant, D., Rees, P., Clarke, F., Ferraro-Wood, V., Gonzalez, O., Jones, M., Álvarez Urueña, A., Vilaseca, H., Arribas Mocoroa, S., Caballero, J. A., Carracedo Carballal, G. J., Estrada Piqueras, A., Ferro, I., García García, M., Lamperti, I., Pereira Santaella, M., Perna, M., …York, A. (2024, June). HARMONI at ELT: project status and instrument overview. Paper presented at Ground-based and Airborne Instrumentation for Astronomy X, Yokohama, Japan

The Blue Multi Unit Spectroscopic Explorer (BlueMUSE) on the VLT: science drivers and overview of instrument design (2024)
Presentation / Conference Contribution
Richard, J., Giroud, R., Laurent, F., Krajnovic, D., Jeanneau, A., Bacon, R., Abreu, M., Adamo, A., Araujo, R., Bouché, N., Brinchmann, J., Cai, Z., Castro Rodriguez, N., Calcines, A., Chapuis, D., Claeyssens, A., Cortese, L., Daddi, E., Davison, C., Goodwin, M., …Zheng, J. (2024, June). The Blue Multi Unit Spectroscopic Explorer (BlueMUSE) on the VLT: science drivers and overview of instrument design. Presented at Ground-based and Airborne Instrumentation for Astronomy X, Yokohama, Japan

Two-dimensional kinematics and dynamical modelling of the ‘Jackpot’ gravitational lens from deep MUSE observations (2024)
Journal Article
Turner, H. C., Smith, R. J., & Collett, T. E. (2024). Two-dimensional kinematics and dynamical modelling of the ‘Jackpot’ gravitational lens from deep MUSE observations. Monthly Notices of the Royal Astronomical Society, 528(2), 3559-3575. https://doi.org/10.1093/mnras/stae263

We present results from the first spatially resolved kinematic and dynamical modelling analysis of the unique SDSSJ0946+1006 (‘Jackpot’) triple-source lens system, where a single massive foreground z = 0.222 galaxy multiple-images three background so... Read More about Two-dimensional kinematics and dynamical modelling of the ‘Jackpot’ gravitational lens from deep MUSE observations.

Abell 1201: detection of an ultramassive black hole in a strong gravitational lens (2023)
Journal Article
Nightingale, J., Smith, R. J., He, Q., O’Riordan, C. M., Kegerreis, J. A., Amvrosiadis, A., Edge, A. C., Etherington, A., Hayes, R. G., Kelly, A., Lucey, J. R., & Massey, R. J. (2023). Abell 1201: detection of an ultramassive black hole in a strong gravitational lens. Monthly Notices of the Royal Astronomical Society, 521(3), 3298-3322. https://doi.org/10.1093/mnras/stad587

Supermassive black holes (SMBHs) are a key catalyst of galaxy formation and evolution, leading to an observed correlation between SMBH mass MBH and host galaxy velocity dispersion σe. Outside the local Universe, measurements of MBH are usually only p... Read More about Abell 1201: detection of an ultramassive black hole in a strong gravitational lens.

The wide-field, multiplexed, spectroscopic facility WEAVE: Survey design, overview, and simulated implementation (2023)
Journal Article
Jin, S., Trager, S. C., Dalton, G. B., Aguerri, J. A. L., Drew, J. E., Falcón-Barroso, J., Gänsicke, B. T., Hill, V., Iovino, A., Pieri, M. M., Poggianti, B. M., Smith, D. J. B., Vallenari, A., Abrams, D. C., Aguado, D. S., Antoja, T., Aragón-Salamanca, A., Ascasibar, Y., Babusiaux, C., Balcells, M., …Zurita, C. (2024). The wide-field, multiplexed, spectroscopic facility WEAVE: Survey design, overview, and simulated implementation. Monthly Notices of the Royal Astronomical Society, 530(3), 2688-2730. https://doi.org/10.1093/mnras/stad557

Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy (2022)
Journal Article
Poci, A., & Smith, R. J. (2022). Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy. Monthly Notices of the Royal Astronomical Society, 512(4), 5298-5310. https://doi.org/10.1093/mnras/stac776

Exploiting the relative proximity of the nearby strong-lens galaxy SNL-1, we present a critical comparison of the mass estimates derived from independent modelling techniques. We fit triaxial orbit-superposition dynamical models to spatially resolved... Read More about Comparing lensing and stellar orbital models of a nearby massive strong-lens galaxy.

Probing cool giants in unresolved galaxies using fluctuation eigenspectra: A demonstration using high-resolution MUSE observations of NGC 5128 (2021)
Journal Article
Smith, R. J. (2022). Probing cool giants in unresolved galaxies using fluctuation eigenspectra: A demonstration using high-resolution MUSE observations of NGC 5128. Monthly Notices of the Royal Astronomical Society, 509(4), 5737-5746. https://doi.org/10.1093/mnras/stab3415

I describe and demonstrate a new approach to using spectroscopic data to exploit Poisson sampling fluctuations in unresolved stellar populations. The method is introduced using spectra predicted for independent samples of stars from a 10 Gyr populati... Read More about Probing cool giants in unresolved galaxies using fluctuation eigenspectra: A demonstration using high-resolution MUSE observations of NGC 5128.

A fully-spectroscopic triple-source-plane lens: the Jackpot completed (2021)
Journal Article
Smith, R. J., & Collett, T. E. (2021). A fully-spectroscopic triple-source-plane lens: the Jackpot completed. Monthly Notices of the Royal Astronomical Society, 505(2), 2136-2140. https://doi.org/10.1093/mnras/stab1399

We present a spectroscopic determination of the redshift of the second source in the Jackpot gravitational lens system J0946 + 1006, for which only a photometric estimate of zphot  =  2.41+0.04−0.21 has previously been available. By visually inspecti... Read More about A fully-spectroscopic triple-source-plane lens: the Jackpot completed.

A Triple Rollover: A third multiply-imaged source at z~6 behind the Jackpot gravitational lens (2020)
Journal Article
Collett, T. E., & Smith, R. J. (2020). A Triple Rollover: A third multiply-imaged source at z~6 behind the Jackpot gravitational lens. Monthly Notices of the Royal Astronomical Society, 497(2), 1654-1660. https://doi.org/10.1093/mnras/staa1804

Using a 5-h adaptive-optics-assisted observation with Multi-Unit Spectroscopic Explorer, we have identified a doubly imaged Ly α source at a redshift of 5.975 behind the z = 0.222 lens galaxy J0946+1006 (the ‘Jackpot’). The source separation implies... Read More about A Triple Rollover: A third multiply-imaged source at z~6 behind the Jackpot gravitational lens.

MNELLS: The MUSE Nearby Early-Type Galaxy Lens Locator Survey (2020)
Journal Article
Lucey, J. R., Smith, R. J., & Collier, W. P. (2020). MNELLS: The MUSE Nearby Early-Type Galaxy Lens Locator Survey. Monthly Notices of the Royal Astronomical Society, 494(1), 271-292. https://doi.org/10.1093/mnras/staa602

Low-redshift strong-lensing galaxies can provide robust measurements of the stellar mass-to-light ratios in early-type galaxies (ETGs), and hence constrain variations in the stellar initial mass function (IMF). At present, only a few such systems are... Read More about MNELLS: The MUSE Nearby Early-Type Galaxy Lens Locator Survey.

Discovering novae in early-type galaxies with MUSE: A chance find in NGC 1404, and 12 more candidates from an archival search (2020)
Journal Article
Smith, R. J. (2020). Discovering novae in early-type galaxies with MUSE: A chance find in NGC 1404, and 12 more candidates from an archival search. Monthly Notices of the Royal Astronomical Society: Letters, 494(1), L1-L5. https://doi.org/10.1093/mnrasl/slaa023

I report the discovery of a transient broad-Hα point source in the outskirts of the giant elliptical galaxy NGC 1404, discovered in archival observations taken with the Multi-Unit Spectroscopic Explorer (MUSE) integral field spectrograph. The Hα line... Read More about Discovering novae in early-type galaxies with MUSE: A chance find in NGC 1404, and 12 more candidates from an archival search.

Subaru FOCAS IFU observations of two z=0.12 strong-lensing elliptical galaxies from SDSS MaNGA (2020)
Journal Article
Smith, R. J., Collier, W. P., Ozaki, S., & Lucey, J. R. (2020). Subaru FOCAS IFU observations of two z=0.12 strong-lensing elliptical galaxies from SDSS MaNGA. Monthly Notices of the Royal Astronomical Society: Letters, 493(1), L33-L38. https://doi.org/10.1093/mnrasl/slaa003

We present new observations of two z = 0.12 strong-lensing elliptical galaxies, originally discovered from the SDSS-IV MaNGA survey, using the new FOCAS IFU spectrograph on the Subaru Telescope. For J1436+4943, our observations confirm the identifica... Read More about Subaru FOCAS IFU observations of two z=0.12 strong-lensing elliptical galaxies from SDSS MaNGA.

"Upper-limit lensing": constraining galaxy stellar masses with singly imaged background sources (2018)
Journal Article
Smith, R. J., Lucey, J. R., & Collier, W. P. (2018). "Upper-limit lensing": constraining galaxy stellar masses with singly imaged background sources. Monthly Notices of the Royal Astronomical Society, 481(2), 2115-2124. https://doi.org/10.1093/mnras/sty2328

Strong gravitational lensing can provide accurate measurements of the stellar mass-to-light ratio Υ in low-redshift (z ≲ 0.05) early-type galaxies, and hence probe for possible variations in the stellar initial mass function (IMF). However, true mult... Read More about "Upper-limit lensing": constraining galaxy stellar masses with singly imaged background sources.

A precise extragalactic test of General Relativity (2018)
Journal Article
Collett, T. E., Oldham, L. J., Smith, R. J., Auger, M. W., Westfall, K. B., Bacon, D., Nichol, R. C., Masters, K. L., Koyama, K., & van den Bosch, R. (2018). A precise extragalactic test of General Relativity. Science, 360(6395), 1342-1346. https://doi.org/10.1126/science.aao2469

Einstein’s theory of gravity, General Relativity, has been precisely tested on Solar System scales, but the long-range nature of gravity is still poorly constrained. The nearby strong gravitational lens ESO 325-G004 provides a laboratory to probe the... Read More about A precise extragalactic test of General Relativity.

KINETyS II: Constraints on spatial variations of the stellar initial mass function from K-band spectroscopy (2018)
Journal Article
Alton, P., Smith, R., & Lucey, J. (2018). KINETyS II: Constraints on spatial variations of the stellar initial mass function from K-band spectroscopy. Monthly Notices of the Royal Astronomical Society, 478(4), 4464-4486. https://doi.org/10.1093/mnras/sty1242

We investigate the spatially resolved stellar populations of a sample of seven nearby massive Early-type galaxies (ETGs), using optical and near infrared data, including K-band spectroscopy. This data offers good prospects for mitigating the uncertai... Read More about KINETyS II: Constraints on spatial variations of the stellar initial mass function from K-band spectroscopy.

A new strong-lensing galaxy at z=0.066: Another elliptical galaxy with a lightweight IMF (2018)
Journal Article
Collier, W. P., Smith, R. J., & Lucey, J. R. (2018). A new strong-lensing galaxy at z=0.066: Another elliptical galaxy with a lightweight IMF. Monthly Notices of the Royal Astronomical Society, 478(2), 1595-1600. https://doi.org/10.1093/mnras/sty1188

We report the discovery of a new low-redshift galaxy-scale gravitational lens, identified from a systematic search of publicly available MUSE observations. The lens galaxy, 2MASXJ04035024-0239275, is a giant elliptical at z = 0.06604 with a velocity... Read More about A new strong-lensing galaxy at z=0.066: Another elliptical galaxy with a lightweight IMF.

Serendipitous discovery of quadruply imaged quasars: two diamonds (2018)
Journal Article
Lucey, J. R., Schechter, P. L., Smith, R. J., & Anguita, T. (2018). Serendipitous discovery of quadruply imaged quasars: two diamonds. Monthly Notices of the Royal Astronomical Society, 476(1), 927-932. https://doi.org/10.1093/mnras/sty243

Gravitationally lensed quasars are powerful and versatile astrophysical tools, but they are challengingly rare. In particular, only ∼25 well-characterized quadruple systems are known to date. To refine the target catalogue for the forthcoming Taipan... Read More about Serendipitous discovery of quadruply imaged quasars: two diamonds.