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The Mass-Metallicity Relation at Cosmic Noon in Overdense Environments: First Results from the MAMMOTH-Grism HST Slitless Spectroscopic Survey
Teplitz, Harry I.; Fan, Xiaohui; Cai, Zheng +9 more
The MAMMOTH-Grism slitless spectroscopic survey is a Hubble Space Telescope (HST) cycle 28 medium program, which is obtaining 45 orbits of WFC3/IR grism spectroscopy in the density peak regions of three massive galaxy protoclusters at z = 2-3 discovered using the MAMMOTH technique. We introduce this survey by presenting the first measurement of th…
Self-absorption in [C II], 12CO, and H I in RCW120. Building up a geometrical and physical model of the region
Schneider, N.; Zavagno, A.; Stutzki, J. +19 more
Aims: Revealing the 3D dynamics of H II region bubbles and their associated molecular clouds and H I envelopes is important for developing an understanding of the longstanding problem as to how stellar feedback affects the density structure and kinematics of the different phases of the interstellar medium.
Methods: We employed observatio…
Combined APOGEE-GALAH stellar catalogues using the Cannon
Lewis, Geraint F.; Wittenmyer, Robert A.; Buder, Sven +21 more
APOGEE and GALAH are two high resolution multi-object spectroscopic surveys that provide fundamental stellar parameters and multiple elemental abundance estimates for about half a million stars in the Milky Way. Both surveys observe in different wavelength regimes and use different data reduction pipelines leading to significant offsets and trends…
Observing Ram Pressure at Work in Intermediate Redshift Clusters with MUSE: The Case of Abell 2744 and Abell 370
Richard, Johan; Fritz, Jacopo; Vulcani, Benedetta +11 more
Ram pressure stripping has been proven to be effective in shaping galaxy properties in dense environments at low redshift. The availability of Multi Unit Spectroscopic Explorer (MUSE) observations of a sample of distant (z ~ 0.3-0.5) clusters has allowed one to search for galaxies subject to this phenomenon at significant lookback times. In this p…
Ninety-seven Eclipsing Quadruple Star Candidates Discovered in TESS Full-frame Images
Kostov, Veselin B.; Powell, Brian P.; Rappaport, Saul A. +17 more
We present a catalog of 97 uniformly vetted candidates for quadruple star systems. The candidates were identified in TESS full-frame image data from sectors 1-42 through a combination of machine-learning techniques and visual examination, with major contributions from a dedicated group of citizen scientists. All targets exhibit two sets of eclipse…
A population synthesis fitting of the Gaia resolved white dwarf binary population within 100 pc
Solano, E.; Rebassa-Mansergas, A.; Torres, S. +2 more
The Gaia mission has provided an unprecedented wealth of information about the white dwarf population of our Galaxy. In particular, our studies show that the sample up to 100 pc from the Sun can be considered as practically complete. This fact allows us to estimate a precise fraction of double-degenerate (1.18 ± 0.10 per cent) and white dwarf plus…
The messy death of a multiple star system and the resulting planetary nebula as observed by JWST
Ventura, Paolo; Amram, Philippe; Mendes de Oliveira, Claudia +66 more
Planetary nebulae—the ejected envelopes of red giant stars—provide us with a history of the last, mass-losing phases of 90% of stars initially more massive than the Sun. Here we analyse images of the planetary nebula NGC 3132 from the James Webb Space Telescope (JWST) Early Release Observations. A structured, extended hydrogen halo surrounding an …
The Host Galaxy and Rapidly Evolving Broad-line Region in the Changing-look Active Galactic Nucleus 1ES 1927+654
Ho, Luis C.; Ricci, Claudio; Trakhtenbrot, Benny +4 more
Changing-look active galactic nuclei (AGNs) present an important laboratory to understand the origin and physical properties of the broad-line region (BLR). We investigate follow-up optical spectroscopy spanning ~500 days after the outburst of the changing-look AGN 1ES 1927+654. The emission lines displayed dramatic, systematic variations in inten…
High-Resolution Spectral and Anisotropy Characteristics of Solar Protons During the GLE N∘73 on 28 October 2021 Derived with Neutron-Monitor Data Analysis
Vainio, Rami; Riihonen, Esa; Mishev, Alexander L. +4 more
The first ground-level enhancement of the current Solar Cycle 25 occurred on 28 October 2021. It was observed by several space-borne and ground-based instruments, specifically neutron monitors. A moderate count-rate increase over the background was observed by high-altitude polar stations on the South Pole and Dome C stations at the Antarctic plat…
Stellar feedback in M 83 as observed with MUSE. II. Analysis of the H II region population: Ionisation budget and pre-SN feedback
Della Bruna, Lorenza; Robert, Carmelle; Amram, Philippe +11 more
Context. Energy and momentum injected by young, massive stars into the surrounding gas play an important role in regulating further star formation and in determining the galaxy's global properties. Before supernovae begin to explode, stellar feedback consists of two main processes: radiation pressure and photoionisation.
Aims: We study pre-su…