Search Publications
Survey of Surveys. I. The largest compilation of radial velocities for the Galaxy
Rainer, M.; Marinoni, S.; Randich, S. +8 more
Context. In the present-day panorama of large spectroscopic surveys, the amount, diversity, and complexity of the available data continuously increase. The overarching goal of studying the formation and evolution of our Galaxy is hampered by the heterogeneity of instruments, selection functions, analysis methods, and measured quantities.
Aims…
Scanning Disk Rings and Winds in CO at 0.01-10 au: A High-resolution M-band Spectroscopy Survey with IRTF-iSHELL
Banzatti, Andrea; Bosman, Arthur D.; Pontoppidan, Klaus M. +11 more
We present an overview and first results from a M-band spectroscopic survey of planet-forming disks performed with iSHELL on the Infrared Telescope Facility, using two slits that provide resolving power R ≈ 60,000-92,000 (5-3.3 km s-1). iSHELL provides a nearly complete coverage at 4.52-5.24 µm in one shot, covering >50 lines f…
A SPHERE survey of self-shadowed planet-forming disks
Pinte, C.; Ménard, F.; Avenhaus, H. +20 more
To date, nearly two hundred planet-forming disks have been imaged at high resolution. Our propensity to study bright and extended objects does, however, bias our view of the disk demography. In this work, we aim to help alleviate this bias by analyzing fifteen disks targeted with VLT/SPHERE that look faint in scattered light. Sources were selected…
CLEAR: Emission-line Ratios at Cosmic High Noon
Papovich, Casey; Finkelstein, Steven L.; Cleri, Nikko J. +10 more
We use Hubble Space Telescope Wide Field Camera 3 G102 and G141 grism spectroscopy to measure rest-frame optical emission-line ratios of 533 galaxies at z ~ 1.5 in the CANDELS Lyα Emission at Reionization survey. We compare [O III]/Hβ versus [S II]/(Hα + [N II]) as an "unVO87" diagram for 461 galaxies and [O III]/Hβ versus [Ne III]/[O II] as an "O…
Automated galaxy-galaxy strong lens modelling: No lens left behind
Massey, Richard; Robertson, Andrew; Tam, Sut-Ieng +9 more
The distribution of dark and luminous matter can be mapped around galaxies that gravitationally lens background objects into arcs or Einstein rings. New surveys will soon observe hundreds of thousands of galaxy lenses and current labour-intensive analysis methods will not scale up to this challenge. We develop an automatic Bayesian method, which w…
Primordial black holes in nonminimal derivative coupling inflation with quartic potential and reheating consideration
Karami, Kayoomars; Heydari, Soma
We investigate the generation of primordial black holes (PBHs) with the aid of gravitationally increased friction mechanism originated from the nonminimal field derivative coupling (NMDC) to gravity framework, with the quartic potential. Applying the coupling parameter as a two-parted function of inflaton field and fine-tuning of five parameter as…
Molecules with ALMA at Planet-forming Scales (MAPS): A Circumplanetary Disk Candidate in Molecular-line Emission in the AS 209 Disk
Zhang, Ke; Wilner, David J.; Ménard, François +29 more
We report the discovery of a circumplanetary disk (CPD) candidate embedded in the circumstellar disk of the T Tauri star AS 209 at a radial distance of about 200 au (on-sky separation of 1.″4 from the star at a position angle of 161°), isolated via 13CO J = 2-1 emission. This is the first instance of CPD detection via gaseous emission c…
The Stellar Halo of the Galaxy is Tilted and Doubly Broken
Conroy, Charlie; Ting, Yuan-Sen; Johnson, Benjamin D. +7 more
Modern Galactic surveys have revealed an ancient merger that dominates the stellar halo of our galaxy (Gaia-Sausage-Enceladus, GSE). Using chemical abundances and kinematics from the H3 Survey, we identify 5559 halo stars from this merger in the radial range r Gal = 6-60kpc. We forward model the full selection function of H3 to infer th…
Mapping the Galactic Metallicity Gradient with Open Clusters: The State-of-the-Art and Future Challenges
Cunha, Katia; Spina, Lorenzo; Magrini, Laura
In this paper, we make use of data collected for open cluster members by high-resolution spectroscopic surveys and programmes (i.e., APOGEE, Gaia-ESO, GALAH, OCCASO, and SPA). These data have been homogenised and then analysed as a whole. The resulting catalogue contains [Fe/H] and orbital parameters for 251 Galactic open clusters. The slope of th…
Anomalous Flux in the Cosmic Optical Background Detected with New Horizons Observations
Buratti, Bonnie J.; Singer, Kelsi N.; Schenk, Paul M. +27 more
We used New Horizons LORRI images to measure the optical-band (0.4 ≲ λ ≲ 0.9µm) sky brightness within a high-galactic-latitude field selected to have reduced diffuse scattered light from the Milky Way galaxy (DGL), as inferred from the IRIS all-sky 100 µm map. We also selected the field to significantly reduce the scattered light from …