Search Publications
Resolved Lyman-α properties of a luminous Lyman-break galaxy in a large ionized bubble at z = 6.53
Sobral, David; Cantalupo, Sebastiano; Darvish, Behnam +5 more
The observed properties of the Lyman-α (Ly α) emission line are a powerful probe of neutral gas in and around galaxies. We present spatially resolved Ly α spectroscopy with VLT/MUSE targeting VR7, a UV-luminous galaxy at z = 6.532 with moderate Ly α equivalent width (EW0 ≈ 38 Å). These data are combined with deep resolved [CII]158&…
Detailed Iron-peak Element Abundances in Three Very Metal-poor Stars
Roederer, Ian U.; Sneden, Christopher; Cowan, John J. +4 more
We have obtained new detailed abundances of the Fe-group elements Sc through Zn (Z = 21-30) in three very metal-poor ([Fe/H] ≈ -3) stars: BD+03o740, BD-13o3442, and CD-33o1173. High-resolution ultraviolet Hubble Space Telescope/Space Telescope Imaging Spectrograph spectra in the wavelength range 2300-3050 Å were ga…
Temperature and chemical species distributions in the middle atmosphere observed during Titan's late northern spring to early summer
Seignovert, B.; Teanby, N. A.; Flasar, F. M. +12 more
We present a study of the seasonal evolution of Titan's thermal field and distributions of haze, C2H2, C2H4, C2H6, CH3C2H, C3H8, C4H2, C6H6, HCN, and HC3N from March 2015 (Ls
Long-term Orbital Evolution of Galactic Satellites and the Effects on Their Star Formation Histories
Chiba, Masashi; Miyoshi, Takahiro
We investigate the orbital motions of dwarf spheroidal galaxies (dSphs) in the halo of the Milky Way (MW) to understand their possible effects on the diversity of the star formation histories seen in these MW satellites. In this work, we explicitly consider a time-varying gravitational potential due to the growth of the MW's dark halo mass to calc…
The GALAH survey: temporal chemical enrichment of the galactic disc
Lewis, Geraint F.; Ting, Yuan-Sen; Casey, Andrew R. +22 more
We present isochrone ages and initial bulk metallicities ([Fe/H]_{bulk}, by accounting for diffusion) of 163 722 stars from the GALAH Data Release 2, mainly composed of main-sequence turn-off stars and subgiants (7000 K> T_{ eff}> 4000 K and log g>3 dex). The local age-metallicity relationship (AMR) is nearly flat but with significant sca…
IRAM 30-m-EMIR redshift search of z = 3-4 lensed dusty starbursts selected from the HerBS sample
Pérez-Fournon, I.; Ivison, R. J.; Clements, D. L. +15 more
Using the Eight MIxer Receiver (EMIR) instrument on the Institut de RadioAstronomie Millimétrique (IRAM) 30-m telescope, we conducted a spectroscopic redshift search of seven zphot ∼ 4 submillimetre bright galaxies selected from the Herschel Bright Sources sample with fluxes at 500 µm greater than 80 mJy. For four sources, we obta…
TESS Reveals HD 118203 b to be a Transiting Planet
Vanderburg, Andrew; Latham, David W.; Kane, Stephen R. +34 more
The exoplanet HD 118203 b, orbiting a bright (V = 8.05) host star, was discovered using the radial velocity method by da Silva et al., but was not previously known to transit. Transiting Exoplanet Survey Satellite (TESS) photometry has revealed that this planet transits its host star. Nine planetary transits were observed by TESS, allowing us to m…
TOI-132 b: A short-period planet in the Neptune desert transiting a V = 11.3 G-type star★
Vanderburg, Andrew; Latham, David W.; Law, Nicholas M. +49 more
The Neptune desert is a feature seen in the radius-period plane, whereby a notable dearth of short period, Neptune-like planets is found. Here, we report the Transiting Exoplanet Survey Satellite (TESS) discovery of a new short-period planet in the Neptune desert, orbiting the G-type dwarf TYC 8003-1117-1 (TOI-132). TESS photometry shows transit-l…
A model for redistributing heat over the surface of irradiated spider companions
Clark, C. J.; Breton, R. P.; Kennedy, M. R. +2 more
Spider pulsars are binary systems containing an energetic millisecond pulsar that intensely irradiates a closely orbiting low-mass companion. Modelling their companion's optical light curves is essential to the study of the orbital properties of the binary, including the determination of the pulsar mass, characterizing the pulsar wind, and the sta…
The spin-orbit alignment of visual binaries
Albrecht, S.; Justesen, A. B.
Context. The angle between the stellar spin-axis and the orbital plane of a stellar or planetary companion has important implications for the formation and evolution of such systems. A study by Hale (1994, AJ, 107, 306) found that binaries with separations a ≲ 30 au are preferentially aligned while binaries on wider orbits are frequently misaligne…