Search Publications
Extending the Dynamic Range of Galaxy Outflow Scaling Relations: Massive Compact Galaxies with Extreme Outflows
Moustakas, John; Coil, Alison L.; Rudnick, Gregory H. +11 more
We investigate galactic winds in the HizEA galaxies, a collection of 46 late-stage galaxy mergers at z = 0.4-0.8, with stellar masses of $\mathrm{log}({M}_{* }/{M}_{\odot })=10.4\mbox{--}11.5$ , star formation rates (SFRs) of 20-500 M ⊙ yr-1, and ultra-compact (a few 100 pc) central star-forming regions. We measure their gas …
A Mini-Neptune Orbiting the Metal-poor K Dwarf BD+29 2654
Hellier, Coel; Batalha, Natalie M.; Kane, Stephen R. +48 more
We report the discovery and Doppler mass measurement of a 7.4 days 2.3 R ⊕ mini-Neptune around a metal-poor K dwarf BD+29 2654 (TOI-2018). Based on a high-resolution Keck/HIRES spectrum, the Gaia parallax, and multiwavelength photometry from the UV to the mid-infrared, we found that the host star has ${T}_{\mathrm{eff}}={4174}_{-42}^{+3…
Improved radius determinations for the transiting brown dwarf population in the era of Gaia and TESS
Carmichael, Theron W.
I report updates to the substellar mass-radius diagram for 11 transiting brown dwarfs (BDs) and low-mass stars published before the third data release from the Gaia mission (Gaia DR3). I re-analyse these transiting BD systems whose physical parameters were published between 2008 and 2019 and find that when using the parallax measurements from Gaia…
The use of double-mode RR Lyrae stars as robust distance and metallicity indicators
Wang, Shu; Deng, Licai; Chen, Xiaodian +1 more
RR Lyrae stars are one of the primary distance indicators for old stellar populations such as globular clusters, dwarf galaxies and galaxies. Typically, fundamental-mode RR Lyr stars are used for distance measurements, and their accuracy is strongly limited by the dependence of absolute magnitudes on metallicity, in both the optical and infrared b…
MUSE-ALMA Haloes XI: gas flows in the circumgalactic medium
Kacprzak, Glenn G.; Nelson, Dylan; Kulkarni, Varsha P. +12 more
The flow of gas into and out of galaxies leaves traces in the circumgalactic medium which can then be studied using absorption lines towards background quasars. We analyse 27 ${{\log [N({\textrm {H}}\, {\small {I}})/\rm {cm}^{-2}]}} > 18.0$ H I absorbers at z = 0.2 to 1.4 from the MUSE-ALMA Haloes survey with at least one galaxy counterpart wit…
Measuring Galactic dark matter through unsupervised machine learning
Lim, Sung Hak; Buckley, Matthew R.; Shih, David +1 more
Measuring the density profile of dark matter in the Solar neighbourhood has important implications for both dark matter theory and experiment. In this work, we apply autoregressive flows to stars from a realistic simulation of a Milky Way-type galaxy to learn - in an unsupervised way - the stellar phase space density and its derivatives. With thes…
A Massive Hot Jupiter Orbiting a Metal-rich Early M Star Discovered in the TESS Full-frame Images
Latham, David W.; Quinn, Samuel N.; Littlefield, Colin +41 more
Observations and statistical studies have shown that giant planets are rare around M dwarfs compared with Sun-like stars. The formation mechanism of these extreme systems has remained under debate for decades. With the help of the TESS mission and ground-based follow-up observations, we report the discovery of TOI-4201b, the most massive and dense…
The ALMA Frontier Fields Survey. VI. Lensing-corrected 1.1 mm number counts in Abell 2744, MACSJ0416.1-2403, MACSJ1149.5+2223, Abell 370, and Abell S1063
Kneissl, R.; Demarco, R.; Bauer, F. E. +8 more
Context. Probing the faint end of the number counts at millimeter wavelengths is important in order to identify the origin of the extragalactic background light in this regime. Aided by strong gravitational lensing, ALMA observations toward massive galaxy clusters have opened a window to probe this origin, allowing us to resolve sub-milliJansky du…
CARMA-NRO Orion Survey: Unbiased Survey of Dense Cores and Core Mass Functions in Orion A
Sanhueza, Patricio; Nakamura, Fumitaka; Shimajiri, Yoshito +16 more
The mass distribution of dense cores is a potential key to understanding the process of star formation. Applying dendrogram analysis to the CARMA-NRO Orion C18O (J = 1-0) data, we identify 2342 dense cores, about 22% of which have virial ratios smaller than 2 and can be classified as gravitationally bound cores. The derived core mass fu…
The Chemical Enrichment of the Milky Way Disk Evaluated Using Conditional Abundances
Ness, Melissa K.; Ratcliffe, Bridget L.
Chemical abundances of Milky Way disk stars are empirical tracers of its enrichment history. However, they capture joint-information that is valuable to disentangle. In this work, we quantify how individual abundances evolve across the present-day Galactic radius, at fixed supernovae contribution ([Fe/H], [Mg/Fe]). We use 18,135 Apache Point Obser…