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rasjournals.bsky.social
RAS Journals
@rasjournals.bsky.social
660 followers 510 following 990 posts
Official account for Monthly Notices of the Royal Astronomical Society (MNRAS), Geophysical Journal International (GJI) and RAS Techniques and Instruments (RASTI). See also https://academic.oup.com/rasjournals
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royalastrosoc.bsky.social
Our journal RAS Techniques and Instruments (RASTI) has launched a new special issue entitled 'Habitable World Observatory Mission Concept Development Software, Tools, and Methodologies' – and is inviting submissions related to the topic.

Find out more at: academic.oup.com/rasti/pages/...
February 1, 2026 at 2:15 PM
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academic.oup.com
Student authors may be considered for the #RASTI Student Prize when submitting to RAS Techniques and Instruments.

Submit your research: oxford.ly/4qGkSwu
@rasjournals.bsky.social
RASTI Student Prize: celebrating student research excellence
January 31, 2026 at 1:30 PM
rasjournals.bsky.social
Published in #MNRAS: "REBELS-IFU: evidence for metal-rich massive galaxies at z ∼ 6−8", Rowland et al. This is Fig. 1: please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com
Three-colour composite images of each of the 12 REBELS galaxies targeted in the Cycle 1 JWST program analysed in this work. Please see the paper for the full caption.
January 30, 2026 at 9:35 AM
rasjournals.bsky.social
Published in #GJI Geophysical Journal International: "Moho topography beneath the northern Manila subduction using differential evolution algorithm", Yu et al. This is Fig. 12: please visit academic.oup.com/gji/article/... to read the paper. @royalastrosoc.bsky.social @academic.oup.com
Moho topography in the NMS. The yellow dashed line is Continental–Oceanic boundary from A. Briais et al. (1993), the white dashed line is Continental–Oceanic boundary from S.K. Hsu et al. (2004), the black dashed line is the boundary of the continental shelf, the black solid line is MT, the red solid line is RT. The three solid white lines AB, CD and EF are extracted profiles, subsequently employed to illustrate the Moho topography at different latitudes.
January 30, 2026 at 9:29 AM
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cosmos4u.bsky.social
A phoenix rises from the ashes - WOH G64 is still a red supergiant, for now: academic.oup.com/mnras/articl... -> Keele-led team reveals massive star WOH G64 is still a red supergiant: www.keele.ac.uk/about/news/2...
A phoenix rises from the ashes: WOH G64 is still a red supergiant, for now
ABSTRACT. For a long time, WOH G64 was known as the most extreme red supergiant outside our Galaxy. However, in a matter of years it has faded, its pulsati
academic.oup.com
January 30, 2026 at 4:55 AM
rasjournals.bsky.social
Published in #MNRAS: "Time-delay and lens galaxy redshift in the doubly imaged quasar PS J2305+3714", Burkhonov et al. This is Fig. 1: please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com
The central region of a typical 300-s exposure. This particular frame was taken on the night of 2018-07-06 under 0.96 arcsec seeing. The two quasar images are labelled A and B.
January 29, 2026 at 9:03 AM
rasjournals.bsky.social
Published in #GJI Geophysical Journal International: "Seafloor topography predicted from SWOT gravity data by deep neural network in the northwestern Pacific Ocean", Liu et al. Please visit academic.oup.com/gji/article/... to read the paper. @royalastrosoc.bsky.social @academic.oup.com
Spatial distribution of shipborne sounding depth points. The blue lines indicate single-beam control points, while the red points depict single-beam validation points.
January 29, 2026 at 8:53 AM
rasjournals.bsky.social
Published in #RASTI RAS Techniques & Instruments: "Modelling of turbulence induced quasi-static aberrations at extremely large telescope scales", Gill et al. This is Fig. 2: please visit academic.oup.com/rasti/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com
Power-law gradients as wind direction rotates from –90 through 90 degrees. Top: radial order 2. Middle: azimuthal pair ⁠± 10. Bottom: azimuthal pair ⁠± 1.
January 29, 2026 at 8:48 AM
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royalastrosoc.bsky.social
The Royal Astronomical Society is gravely concerned at the drastic cuts to support for UK astronomy outlined by the Science and Technology Facilities Council.

Read our statement 👉 ras.ac.uk/news-and-pre...
Proposed budget cuts a catastrophe for UK astronomy
The Royal Astronomical Society (RAS) is gravely concerned at the drastic cuts to support for UK astronomy outlined by the Science and Technology Facilities Council (...
ras.ac.uk
January 28, 2026 at 9:07 PM
rasjournals.bsky.social
Published in #MNRAS: "Structure formation under inelastic two-component dark matter: halo statistics and matter power spectra in the high-z universe", Low et al. This is Fig. 2: please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com
Halo formation within the 2cDM model. Each image shows the particle density via a histogram in the most dense slice of the z coordinate. Please see the paper for the full caption.
January 28, 2026 at 8:36 AM
rasjournals.bsky.social
Published in #GJI Geophysical Journal International: "Subsurface structure across the Tacoma Basin, Washington State, using trans-dimensional Bayesian inversion of fundamental mode spatial autocorrelation data", Pachhai et al. academic.oup.com/gji/article/... @royalastrosoc.bsky.social
(Left) Google map of the study with site locations indicated by red triangles. Inset: map with study area indicated by red box. The blue triangles represent the sites with smaller arrays and red triangles represent the sites with larger arrays. (Right) The geology of the study region (simplified from T.J. Lapen 2000) with colour coded V_8_(30) values (obtained from the inversion of SPAC curves) for all the site locations. The triangles with black outlines represent the larger array sites while those with blue outlines represent the smaller array sites. The geologic units for each site locations are shown in Table 1.
January 28, 2026 at 8:29 AM
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royalastrosoc.bsky.social
We're delighted to announce that Dr Stefano Lorito has been appointed Deputy Editor-in-Chief of @rasjournals.bsky.social's Geophysical Journal International.

Read more at: ras.ac.uk/news-and-pre...
Dr Stefano Lorito.
January 27, 2026 at 10:00 AM
rasjournals.bsky.social
Published in #MNRAS: "A phoenix rises from the ashes: WOH G64 is still a red supergiant, for now", van Loon & Ohnaka. This is Fig. 2: please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com
Grand total of nine SALT spectra of WOH G64, representative of the spectral appearance during the period November 2024–December 2025. Spectra below 620 nm and beyond 748 nm have been smoothed with a two-pixel Gaussian kernel except in the large inset (where TiO transitions are identified).
January 27, 2026 at 9:29 AM
rasjournals.bsky.social
Published in #GJI Geophysical Journal International: "Optimized experimental design strategies for ERT monitoring of transient flow processes", Menzel et al. This is Fig. 2: please visit academic.oup.com/gji/article/... to read the paper. @royalastrosoc.bsky.social @academic.oup.com
Overview of the general OED strategies for (a) the data-driven approach and (b) the model-driven approach.
January 27, 2026 at 9:15 AM
rasjournals.bsky.social
Published in #MNRAS: "Towards measuring astrophysical third-order correlation functions with the H.E.S.S. optical intensity interferometer", Zmija et al. This is Fig. 8: please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com
Laboratory set-up to measure third-order correlations of the pseudo-thermal light source.
January 26, 2026 at 10:08 AM
rasjournals.bsky.social
Published in #GJI Geophysical Journal International: "Determining small earthquake focal mechanisms using 360° S-wave polarization: insights from dense seismic arrays", Han & Kim. This is Fig. 1: please visit academic.oup.com/gji/article/... to read the paper. @royalastrosoc.bsky.social
Measuring the S-wave polarization. Please see the paper for the full caption.
January 26, 2026 at 9:43 AM
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jrincayc.bsky.social
Interesting to see strangelets (Example: clusters of
Λ⁰ (itself made of an up, down, and strange quark)) as a possible dark matter candidate. Interesting: "At high temperatures, neutrinos are absorbed by that external layer and cannot reach the strangelets."
academic.oup.com/mnras/articl...
Strange quark matter as dark matter: 40 yr later, a reappraisal
ABSTRACT. Forty years ago Witten suggested that dark matter could be composed of macroscopic clusters of strange quark matter. This idea was very popular f
academic.oup.com
January 25, 2026 at 5:33 PM
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inseismoland.bsky.social
In our new Geophysical Journal International paper, Vikas Kurapati, Gregor Hillers, Lukas Krenz, Michael Bader and I, bring the ITM concept from physics into the realm of numerical 3D elastic seismic wave propagation.

academic.oup.com/gji/advance-...
Numerical wavefield simulations with instantaneous time mirror in a 3D elastic medium
Summary. We simulate an instantaneous time mirror (ITM), i.e., a rapid short duration change in elastic material properties, using numerical experiments in
academic.oup.com
January 24, 2026 at 6:08 AM
rasjournals.bsky.social
Published in #MNRAS: "Can GRB 250702B be explained as the tidal disruption of a white dwarf by an intermediate mass black hole? Yes" Eyles-Ferris et al. Please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com
The long term X-ray light curve of GRB 250702B compared to all 177 1-sigma traces from our MCMC fit using a WD-IMBH model (blue solid lines). The vertical grey lines mark the times of the Fermi triggers. Note the first plotted WXT point is excluded from our fitting.
January 23, 2026 at 9:59 AM
rasjournals.bsky.social
Published in #GJI Geophysical Journal International: "Downscaling FWI images for reducing structural uncertainty", Ruggiero et al. This is Fig. 1: please visit academic.oup.com/gji/article/... to read the paper. @royalastrosoc.bsky.social @academic.oup.com
Overview of the proposed methodology. Downscaling is cast into a Bayesian framework where information coming from the observed data, a smooth effective medium derived from HFWI, is combined with prior knowledge on the small-scale elastic and structural properties to retrieve the posterior distribution of all possible small-scale models that fit the data set.
January 23, 2026 at 9:27 AM
rasjournals.bsky.social
Published in #MNRAS: "Simulations of collision and sloshing in the galaxy group NGC 5098/5096", Albuquerque et al. This is Fig. 9: for the caption & to read the paper please visit academic.oup.com/mnras/articl... @royalastrosoc.bsky.social @academic.oup.com
The top-left panel shows our best-fitting model for the NGC 5098/5096 system, while the top-right panel presents a GALFIT-based model of both dark matter haloes. The bottom panels compare the two: on the left, the residual map obtained by subtracting our best-fitting scenario from the GALFIT model; on the right, the g-band residual image after subtracting the stellar light models, highlighting the ICL within the white contours, adapted from Paper I.
January 22, 2026 at 9:05 AM
rasjournals.bsky.social
Published in #GJI: "Estimating an airborne dipole source using 3-D wavefield simulations and seismic receivers on the ground", McPherson et al. This is Fig. 1: please visit academic.oup.com/gji/article/... to read the paper.
Cross-sections of 3-D fluid-solid models in this study, along with source and receiver locations. The X-Z cross-sections are vertically exaggerated in order to better display the topography in (b) and (c). Source locations are listed in Table 2 for sources F1, F2, F3, and F4. Please see the paper for the full caption.
January 22, 2026 at 8:49 AM
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drnereide.bsky.social
🧵
When we look at this LOFAR radio map overlaid on Pan-STARRS optical light, it almost feels like we’re seeing the supermassive black hole in J1007+3540, right at this giant radio galaxy’s center, awaken in real time.

Paper in MNRAS➡️ academic.oup.com/mnras/articl...

🔭 🧪 #cosmology #science

1/9
LOFAR DR2 image of J1007+3540 superimposed over a soft optical background from Pan-STARRS. You see a bright compact spot right in the middle—that’s the inner jet lighting up again—surrounded by fainter, sprawling lobes and a long wispy tail stretching off at the bottom. The whole thing looks like a huge, uneven radio structure emerging from a small galaxy dot in the center.
January 21, 2026 at 4:52 PM
rasjournals.bsky.social
Published in "Constraints on sunspot group lifetimes from far-side Sun-as-a-star helioseismology with BiSON", Chaplin et al. This is Fig. 1: please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com
Schematic flow chart covering the key steps in the simulations of sunspot group areas (see text for details of each step).
January 21, 2026 at 9:45 AM
rasjournals.bsky.social
Published in #GJI Geophysical Journal International: "Which is better: deep-learning or manual seismic arrival-time picking?", Cianetti et al. This is Fig. 1: please visit academic.oup.com/gji/article/... to read the paper. @royalastrosoc.bsky.social @academic.oup.com
(a) Map of the central Apennines area indicated by the blue rectangle in the inset. Seismic stations used in the analysis are shown as triangles coloured according to network codes: IV, the permanent Italian Seismic Network (Istituto Nazionale di Geofisica e Vulcanologia INGV2005); MN, Mediterranean Very Broadband Seismographic Network (MedNet Project Partner Institutions 1990), XO, INGV EMERSITO Seismic Network, 2016 Central Italy (EMERSITO Working Group 2018); 8P, INGV SISMIKO working group (S. Marzorati et al. 2023). Purple dots are the 84 991 earthquakes detected and located by BSI in the time period 2016 August 15–2017 August 31. Yellow stars are the three main shocks of the central Apennines seismic sequence. (b) Zoom in the area delimited by the red rectangle where 13 984 selected BSI earthquakes occurred between 2016 October 20 and November 30. The epicentres are represented as circles whose size is proportional to earthquake magnitude and colour indicates depth. Black crosses are the nodes of the tomographic grid that are inside the area selected. Additional nodes extend outside this area. Solid and dashed black lines show the thrust and normal fault traces, respectively, extracted and simplified after L. Scognamiglio et al. (2018).
January 21, 2026 at 9:38 AM