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Nested dust shells around the Wolf-Rayet binary WR 140 observed with JWST
Hamaguchi, Kenji; Corcoran, Michael F.; Morris, Mark R. +29 more
Massive colliding-wind binaries that host a Wolf-Rayet (WR) star present a potentially important source of dust and chemical enrichment in the interstellar medium. However, the chemical composition and survival of dust formed from such systems is not well understood. The carbon-rich Wolf-Rayet binary WR 140 presents an ideal astrophysical laborato…
Accretion mode versus radio morphology in the LOFAR Deep Fields
Bondi, M.; Prandoni, I.; Shimwell, T. W. +17 more
Radio-loud active galaxies have two accretion modes [radiatively inefficient (RI) and radiatively efficient (RE)], with distinct optical and infrared signatures, and two jet dynamical behaviours, which in arcsec- to arcmin-resolution radio surveys manifest primarily as centre- or edge-brightened structures [Fanaroff-Riley (FR) class I and II]. The…
Constraints on dark matter self-interaction from the internal density profiles of X-COP galaxy clusters
Pointecouteau, E.; Eckert, D.; Ettori, S. +4 more
The fundamental properties of the postulated dark matter (DM) affect the internal structure of gravitationally bound structures. In the cold dark matter paradigm, DM particles interact only via gravity. Their distribution is well represented by an Einasto profile with shape parameter α ≈ 0.18 in the smallest dwarf galaxies or the most massive gala…
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…