Search Publications
The wide-field, multiplexed, spectroscopic facility WEAVE: Survey design, overview, and simulated implementation
Costantin, Luca; Miralda-Escudé, Jordi; Naylor, Tim +212 more
WEAVE, the new wide-field, massively multiplexed spectroscopic survey facility for the William Herschel Telescope, saw first light in late 2022. WEAVE comprises a new 2-deg field-of-view prime-focus corrector system, a nearly 1000-multiplex fibre positioner, 20 individually deployable 'mini' integral field units (IFUs), and a single large IFU. The…
JWST PRIMER: a new multifield determination of the evolving galaxy UV luminosity function at redshifts z ≃ 9 - 15
Bowler, R. A. A.; Cullen, F.; McLure, R. J. +18 more
We present a new determination of the evolving galaxy ultraviolet (UV) luminosity function (LF) over the redshift range
Galaxy build-up in the first 1.5 Gyr of cosmic history: insights from the stellar mass function at z 4-9 from JWST NIRCam observations
Pérez-González, Pablo G.; Santini, Paola; Dickinson, Mark +28 more
Combining the public JWST/NIRCam imaging programs CEERS, PRIMER, and JADES, spanning a total area of $\sim 500\, {\rm arcmin}^2$, we obtain a sample of $\gt $30 000 galaxies at $z_{\rm phot}\sim 4\!-\!9$ that allows us to perform a complete, rest-optical-selected census of the galaxy population at $z\gt 3$. Comparing the stellar mass $M_*$ and the…
EPOCHS VI: the size and shape evolution of galaxies since z 8 with JWST Observations
Conselice, C. J.; Adams, N. J.; Li, Q. +8 more
We present the results of a size and structural analysis of 1395 galaxies at 0.5 ≤ z ≲ 8 with stellar masses log (M*/M⊙)> 9.5 within the James Webb Space Telescope Public CEERS field that overlaps with the Hubble Space Telescope Cosmic Assembly Near-infrared Deep Extragalactic Legacy Survey EGS observations. We use GALFIT …
The dark matter profile of the Milky Way inferred from its circular velocity curve
Frebel, Anna; Eilers, Anna-Christina; Necib, Lina +1 more
In this paper, we construct the circular velocity curve of the Milky Way out to ~30 kpc, providing an updated model of the dark matter density profile. We derive precise parallaxes for 120 309 stars with a data-driven model, using APOGEE DR17 spectra combined with GaiaDR3, 2MASS, and WISE photometry. At outer galactic radii up to 30 kpc, we find a…
In-situ versus accreted Milky Way globular clusters: a new classification method and implications for cluster formation
Belokurov, Vasily; Kravtsov, Andrey
We present a new scheme for the classification of the in-situ and accreted globular clusters (GCs). The scheme uses total energy E and z-component of the orbital angular momentum and is calibrated using the [Al/Fe] abundance ratio. We demonstrate that this classification results in two GC populations with distinct spatial, kinematic, and chemical …
There is no place like home - finding birth radii of stars in the Milky Way
Steinmetz, Matthias; Buck, Tobias; Freeman, Ken C. +6 more
Stars move away from their birthplaces over time via a process known as radial migration, which blurs chemo-kinematic relations used for reconstructing the Milky Way (MW) formation history. To understand the true time evolution of the MW, one needs to take into account the effects of this process. We show that stellar birth radii can be derived di…
The 40 pc sample of white dwarfs from Gaia
Gänsicke, B. T.; Tremblay, P. -E.; Hollands, M. A. +14 more
We present a comprehensive overview of a volume-complete sample of white dwarfs located within 40 pc of the Sun, a significant proportion of which were detected in Gaia Data Release 3 (DR3). Our DR3 sample contains 1076 spectroscopically confirmed white dwarfs, with just five candidates within the volume remaining unconfirmed (> 99 per cent spe…
Strong constraints on the gravitational law from Gaia DR3 wide binaries
Mieske, Steffen; Famaey, Benoit; Ibata, Rodrigo +4 more
We test Milgromian dynamics (MOND) using wide binary stars (WBs) with separations of 2-30 kAU. Locally, the WB orbital velocity in MOND should exceed the Newtonian prediction by $\approx 20~{{\ \rm per\ cent}}$ at asymptotically large separations given the Galactic external field effect (EFE). We investigate this with a detailed statistical analys…
Chasing the impact of the Gaia-Sausage-Enceladus merger on the formation of the Milky Way thick disc
Ting, Yuan-Sen; Grand, Robert J. J.; Fragkoudi, Francesca +8 more
We employ our Bayesian Machine Learning framework BINGO (Bayesian INference for Galactic archaeOlogy) to obtain high-quality stellar age estimates for 68 360 red giant and red clump stars present in the 17th data release of the Sloan Digital Sky Survey, the APOGEE-2 high-resolution spectroscopic survey. By examining the denoised age-met…