| 1. |
- Hsiao, Tiger Yu-Yang, et al.
(författare)
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JWST Reveals a Possible z similar to 11 Galaxy Merger in Triply Lensed MACS0647-JD
- 2023
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Ingår i: Astrophysical Journal Letters. - : American Astronomical Society. - 2041-8205 .- 2041-8213. ; 949:2
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Tidskriftsartikel (refereegranskat)abstract
- MACS0647-JD is a triply lensed z similar to 11 galaxy originally discovered with the Hubble Space Telescope. The three lensed images are magnified by factors of similar to 8, 5, and 2 to AB mag 25.1, 25.6, and 26.6 at 3.5 mu m. The brightest is over a magnitude brighter than other galaxies recently discovered at similar redshifts z > 10 with JWST. Here, we report new JWST imaging that clearly resolves MACS0647-JD as having two components that are either merging galaxies or stellar complexes within a single galaxy. The brighter larger component "A" is intrinsically very blue (ss similar to-2.6 +/- 0.1), likely due to very recent star formation and no dust, and is spatially extended with an effective radius similar to 70 +/- 24 pc. The smaller component "B" (r similar to 20-+ 58 pc) appears redder (ss similar to-2 +/- 0.2), likely because it is older (100-200 Myr) with mild dust extinction (AV similar to 0.1 mag). With an estimated stellar mass ratio of roughly 2:1 and physical projected separation similar to 400 pc, we may be witnessing a galaxy merger 430 million years after the Big Bang. We identify galaxies with similar colors in a high-redshift simulation, finding their star formation histories to be dissimilar, which is also suggested by the spectral energy distribution fitting, suggesting they formed further apart. We also identify a candidate companion galaxy "C" similar to 3 kpc away, likely destined to merge with A and B. Upcoming JWST Near Infrared Spectrograph observations planned for 2023 January will deliver spectroscopic redshifts and more physical properties for these tiny magnified distant galaxies observed in the early universe.
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| 2. |
- Péroux, C., et al.
(författare)
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MUSE-ALMA haloes VII : survey science goals & design, data processing and final catalogues
- 2022
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Ingår i: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 516:4, s. 5618-5636
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Tidskriftsartikel (refereegranskat)abstract
- The gas cycling in the circumgalactic regions of galaxies is known to be multi-phase. The MUSE–ALMA Haloes survey gathers a large multi-wavelength observational sample of absorption and emission data with the goal to significantly advance our understanding of the physical properties of such CGM gas. A key component of the MUSE–ALMA Haloes survey is the multi-facility observational campaign conducted with VLT/MUSE, ALMA, and HST. MUSE–ALMA Haloes targets comprise 19 VLT/MUSE IFS quasar fields, including 32 zabs <0.85 strong absorbers with measured N(H I) ≥1018 cm−2 from UV-spectroscopy. We additionally use a new complementary HST medium program to characterize the stellar content of the galaxies through a 40-orbit three-band UVIS and IR WFC3 imaging. Beyond the absorber-selected targets, we detect 3658 sources all fields combined, including 703 objects with spectroscopic redshifts. This galaxy-selected sample constitutes the main focus of the current paper. We have secured millimeter ALMA observations of some of the fields to probe the molecular gas properties of these objects. Here, we present the overall survey science goals, target selection, observational strategy, data processing and source identification of the full sample. Furthermore, we provide catalogues of magnitude measurements for all objects detected in VLT/MUSE, ALMA, and HST broad-band images and associated spectroscopic redshifts derived from VLT/MUSE observations. Together, this data set provides robust characterization of the neutral atomic gas, molecular gas and stars in the same objects resulting in the baryon census of condensed matter in complex galaxy structures.
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| 3. |
- Alceste, F, et al.
(författare)
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Holding yourself captive: Perceptions of custody during interviews and interrogations
- 2018
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Ingår i: Journal of Applied Research in Memory and Cognition. - : American Psychological Association (APA). - 2211-3681 .- 2211-369X. ; 7:3, s. 387-397
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Tidskriftsartikel (refereegranskat)abstract
- Police custody activates important legal safeguards. To determine custody, courts examine objective conditions and ask whether a “reasonable person” would feel free to leave while being questioned. In Study 1, student participants were either interviewed or interrogated about a staged theft they believed to be real. Interviews and interrogations embodied specific factors considered noncustodial or custodial, respectively. Observers then watched videos of these sessions. Participants in interviews did not feel significantly freer to leave than those in interrogations, though observers did make this distinction. In Study 2, some participants were explicitly pre-advised of their freedom to leave. The advisement induced participants to report they were free to leave as an objective matter but did not significantly affect their subjective feelings of freedom. In both studies, the actor–observer divergence vanished when observers imagined themselves from the actor's perspective. These results challenge legal assumptions about custody and suggest lines of future research.
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| 4. |
- Augustin, Ramona, et al.
(författare)
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MUSE-ALMA Haloes X : the stellar masses of gas-rich absorbing galaxies
- 2024
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Ingår i: Monthly notices of the Royal Astronomical Society. - 0035-8711 .- 1365-2966. ; 528:4, s. 6159-6166
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Tidskriftsartikel (refereegranskat)abstract
- The physical processes by which gas is accreted onto galaxies, transformed into stars, and then expelled from galaxies are of paramount importance to galaxy evolution studies. Observationally constraining each of these baryonic components in the same system, however, is challenging. Furthermore, simulations indicate that the stellar mass of galaxies is a key factor influencing CGM properties. Indeed, absorption lines detected against background quasars offer the most compelling way to study the cold gas in the circumgalactic medium (CGM). The MUSE-ALMA Haloes survey is composed of quasar fields covered with VLT/MUSE observations, comprising 32 H I absorbers at 0.2 < z < 1.4 and 79 associated galaxies, with available or upcoming molecular gas measurements from ALMA. We use a dedicated 40-orbit HST UVIS and IR WFC3 broad-band imaging campaign to characterize the stellar content of these galaxies. By fitting their spectral energy distribution, we establish they probe a wide range of stellar masses: 8.1 < log (M∗/M⊙) < 12.4. Given their star formation rates, most of these objects lie on the main sequence of galaxies. We also confirm a previously reported anticorrelation between the stellar masses and CGM hydrogen column density N (H I), indicating an evolutionary trend where higher mass galaxies are less likely to host large amounts of H I gas in their immediate vicinity up to 120 kpc. Together with other studies from the MUSE-ALMA Haloes survey, these data provide stellar masses of absorber hosts, a key component of galaxy formation and evolution, and observational constraints on the relation between galaxies and their surrounding medium.
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| 5. |
- Kassin, S, et al.
(författare)
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On the general acceptance of confessions research: Opinions of the scientific community
- 2018
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Ingår i: American Psychologist. - : American Psychological Association (APA). - 0003-066X .- 1935-990X. ; 73:1, s. 63-80
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Tidskriftsartikel (refereegranskat)abstract
- Eighty-seven experts on the psychology of confessions—many of whom were highly published, many with courtroom experience—were surveyed online about their opinions on 30 propositions of relevance to deception detection, police interrogations, confessions, and relevant general principles of psychology. As indicated by an agreement rate of at least 80%, there was a strong consensus that several findings are sufficiently reliable to present in court. This list includes but is not limited to the proposition that the risk of false confessions is increased not only by explicit threats and promises but by 2 common interrogation tactics—namely, the false evidence ploy and minimization tactics that imply leniency by offering sympathy and moral justification. Experts also strongly agreed that the risk of undue influence is higher among adolescents, individuals with compliant or suggestible personalities, and those with intellectual impairments or diagnosed psychological disorders. Additional findings indicated that experts set a high standard before judging a proposition to be sufficiently reliable for court—and an even higher standard on the question “Would you testify?” Regarding their role as scientific experts, virtually all respondents stated that their primary objective was to educate the jury and that juries are more competent at evaluating confession evidence with assistance from an expert than without. These results should assist trial courts and expert witnesses in determining what aspects of the science are generally accepted and suitable for presentation in court.
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