RAS Journals

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Official account for Monthly Notices of the Royal Astronomical Society (MNRAS), Geophysical Journal International (GJI) and RAS Techniques and Instruments (RASTI). See also

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RAS Journals@rasjournals· 28d

Published in #GJI Geophysical Journal International: "New archeomagnetic secular variation data from Central Europe for the Early Medieval Ages", Ségué-Passama et al. This is Fig. 1: please visit academic.oup.com/gji/article/... to read the paper. @royalastrosoc.bsky.social

Locations of new archeomagnetic sites from this study and archeomagnetic sites associated with archeointensity taken from HISTMAG database (P. Arneitz et al. 2017), updated with GEOMAGIA50.v3.4 data until 2020 (M.C. Brown et al. 2015) for ages between 300 and 1300 AD. Please see the paper for the full caption.

RAS Journals@rasjournals· 28d

Published in #RASTI RAS Techniques & Instruments: "The gravitational-wave optical transient observer (GOTO) data pipeline and workflow for transient discovery", Lyman et al. This is Fig. 1: please visit academic.oup.com/rasti/articl... to read the paper. @royalastrosoc.bsky.social

A schematic showing the data flow and software implementation of the GOTO transient discovery workflow. Full details are given in the respective sections. Succinctly, data acquired and written by the GOTO mounts to a local file system at the respective observatory (see M. J. Dyer 2020). A RAWTRANSFER service (Section 4.1) at each site monitors these local file systems, packages the new FITS files as they are created and transfers them to a large capacity file system at the University of Warwick, writing the details of the transfer to a record in the transfer data base, also held in Warwick. The insertion of the record emits a NOTIFY signal which tells the Airflow (Section 4.2) scheduler that a new raw insertion DAG (Section 4.2.1) should be scheduled to process the file. The tasks of the KADMILOS pipeline (e.g. Section 4.5) are performed by a cluster of Celery workers, scheduled by Airflow to follow the respective DAG’s logic. As part of these tasks, the workers write processed data and results to a central filesystem and data base. These central data resources are pulled by the GOTO marshall (Section 5), where additional metadata such as contextual information is fetched, and source associations are made. The result source data is then visualized, vetted, and reported by collaboration members via a webserver.

RAS Journals@rasjournals· 29d

Published in #MNRAS: "Understanding eccentric temperate giants: an in-depth study of the architecture and stellar obliquity of the TOI-2134 system", Rescigno et al. This is Fig. 11: please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social

The TOI-2134 system structure. The star is placed at the centre as an orange star. The orbit of planet b is shown in blue, and that of planet c in red. The empirical habitable zone is shown as the light green shaded region, while the narrow habitable zone is overplotted in darker green.

RAS Journals@rasjournals· 29d

Published in #GJI Geophysical Journal International: "The GNSS velocity field of central Greece and the Peloponnese", Briole et al. This is Fig. 1: please visit academic.oup.com/gji/advance-... to read the paper. @royalastrosoc.bsky.social

Locations of the points surveyed during the various GNSS campaigns. Blue squares indicate permanent stations, green circles indicate pillars of the Hellenic Military Geographical Service (HMGS) and red triangles indicate markers. Small crosses indicate pillars surveyed only once, for which velocities are not determined. Reference marks and off-centre auxiliary points are not plotted. Brown labels indicate terrestrial regions, whilst blue ones indicate marine or lacustrine regions. Major city names are plotted in black. The underlying grey dashed quarter-degree grid corresponds to the 1:50 000 scale geographical maps of the region, whose codes are used for the first two digits of the HMGS pillar codes. Based on columns C, E, F, I of Supplementary Table 1.

RAS Journals@rasjournals· 29d

Published in #RASTI RAS Techniques & Instruments: "Big data analyses of neutron monitor measurements: an example with the correlation between Forbush decreases, geomagnetic storms, and other space–weather variables", by Ogbonnaya Okike. academic.oup.com/rasti/articl... @royalastrosoc.bsky.social

Top panel: 42 yr of continuous time-series data measured by the neutron monitor at Lomnicky Stit Observatory. Middle panel: The F10.7 solar index. Bottom panel: The D_(st) index. Taken from I. Krsvardai et al. (2025). The blue, yellow, and green curves, respectively on CR data, F10.7, and D_(st) are least-squares polynomial fit. They reflect longer periodic variability in each data.

RAS Journals@rasjournals· Jul 13

Last week, Alice Power, our newly promoted Deputy Head of Publishing at RAS Journals, attended SPIE spie.org/conferences-... on behalf of RAS Journals to promote in particular RAS Techniques and Instruments (#RASTI). It was good to see all the visitors at the stand. @royalastrosoc.bsky.social

RAS Journals@rasjournals· Jul 13

Published in #MNRAS: "Asteroseismic ages for 17 000 stars in Kepler, K2, and TESS", Willett et al. This is Fig. 1: please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social

Location of stars in our samples in Galactic coordinates. Green, blue, and orange points show stars with reliable ages from Kepler, K2, and TESS, respectively. Plese see the paper for the full caption.

RAS Journals@rasjournals· Jul 13

Published in #GJI Geophysical Journal International: "Seismic attenuation tomography traces fluid pathways in the northern Chile subduction zone", Castro-Melgar et al. This is Fig. 1: please visit academic.oup.com/gji/article/... to read the paper. @royalastrosoc.bsky.social

Overview of the seismic data used in this study. Map showing the distribution of seismic stations (triangles) across northern Chile (21°–23°S). The number of utilized waveforms at each station is indicated by the accompanying scale. The background represents topographic elevation. Volcano symbols indicate the volcanic arc. Dashed lines mark the locations of the A–A′, B–B′ and C–C′ profiles used for the tomographic cross-sections shown in Fig. 7.

RAS Journals@rasjournals· Jul 8

Published in #MNRAS: "Tracing the very early disruption of the Sagittarius dwarf galaxy in the distant Milky Way halo", Bayer et al. This is Fig. 4: please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com

Galactocentric, Cartesian X–Z plot of the Sagittarius stream. We contextualized the group of four RGB stars within the broader framework of the Sagittarius stream and its predicted distant spur features in the Galactocentric north and south directions, as delineated in the simulation by E. Vasiliev et al. (2021). This simulation also tracks the escape time of each particle from its host galaxy, as depicted in the colour scheme. We also include the set of blue horizontal branch stars (octagons) that were identified in the distant, northern spur in M. Bayer et al. (2025).

RAS Journals@rasjournals· Jul 8

Published in #GJI Geophysical Journal International: "Spectral-element simulation of the earthquake–tsunami coupling and bathymetry effects on oceanic wavefields", Hou et al. This is Fig. 1: please visit academic.oup.com/gji/article/... to read the paper @royalastrosoc.bsky.social @academic.oup.com

Diagram of earthquake-triggered tsunamis. (a) Historical earthquake-triggered tsunami events since the 1890s. (b) The progress of the earthquake-triggered tsunami generation.

RAS Journals@rasjournals· Jul 7

Published in #MNRAS: "Ages of the resolved stellar populations inside the JWST/MIRI bubbles in NGC 628", Ck et al. This is Fig. 1: please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com

JWST/MIRI F770W image of NGC 628 covering a field of view of ⁠6 arcmin x 2 arcmin. The cyan ellipses indicate bubbles, along with their identification numbers. The red-filled circles indicate supergiants (SGs) selected using the CMD in NIRCam filters F115W and F200W. The largest of the bubbles (bubble #0 at the top-left) has a radius of 815 pc. The north-east compass is shown at the bottom-right corner to guide the orientation of the RA–DEC tick marks.

RAS Journals@rasjournals· Jul 7

Published in #GJI Geophysical Journal International: "Deep carbon cycling in subduction zones: 2. Moderate thermal parameter favours carbonate dissolution", Wang et al. This is Fig. 1: please visit academic.oup.com/gji/article/... to read the paper. @royalastrosoc.bsky.social @academic.oup.com

Global comparison of dissolved CO2 outflux with subduction-zone thermal parameters and slab dehydration flux, as well as the conceptual illustrations of carbonate dissolution in subduction zones. Please see the paper for the full caption.

RAS Journals@rasjournals· Jul 6

Published in #MNRAS: "Getting to know the star clusters in NGC 1569: Bayesian inference of stellar cluster properties in a dwarf starburst galaxy", Björgvinsson et al. This is Fig. 1: please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com

HST composite image of NGC 1569; red: F658N filter (Halpha+ [N II]), green: F606W filter, light blue: F502N filter ([O III]), and dark blue: F487N filter (H⁠). The three rectangles show our three KCWI positions. The KCWI data cover 54 arcsec (⁠≈800 pc) across the major axis and 48 arcsec (⁠≈700 pc) across the minor axis. The inlay in the bottom right shows a three-colour image constructed from our KCWI data using our three broad-bands as RGB, (red: KCWI 4601, green: KCWI 4101, blue: KCWI 3600). See also fig. 1 in M. J. Hamel-Bravo et al. (2024).

RAS Journals@rasjournals· Jul 6

Published in #GJI Geophysical Journal International: "Re-entry and burn up of Starlink-2382 satellite: estimating trajectory and ablation coefficient from acoustic and coupled seismic waves", Eickhoff et al. Please visit academic.oup.com/gji/article/... to read the paper. @royalastrosoc.bsky.social

(a) Map of the target region in Central Europe. Red triangles indicate seismic stations, while blue inverted triangles denote infrasound stations from which data were retrieved. The inset map illustrates the geographical location of the target region within Europe. (b) Three trajectories are given, derived from human observations in blue (IMO 2024), the meteor observation camera network FRIPON (2024) in yellow, and satellite TLE data in purple (E.A. Satcat 2024). The inset map indicates the position within Europe. Larger cities for orientation are Paris (P), Bern (B), Milano (Mi), Innsbruck (I), Munich (M) and Venice (V).

RAS Journals@rasjournals· Jul 3

Published in #MNRAS: "Dust and coma radicals in C/2024 E1 (Wierzchos): evolution of the activity", Mariblanca-Escalona et al. This is Fig. 1: please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com

R-band intensity map of comet E1 obtained on September 19, 2025. Please see the paper for the full caption.

RAS Journals@rasjournals· Jul 3

Published in #GJI Geophysical Journal International: "High hydraulic diffusivities revealed from in situ measurements in the Delaware Basin: implications for Coulomb stressing and induced seismicity", Bolton et al. Visit academic.oup.com/gji/article/... to read the paper. @royalastrosoc.bsky.social

(A) Map view of earthquakes from the public TexNet catalogue. Relocated earthquakes are plotted as circles and are colour coded by time; the absolute locations are shown with light green squares. Please read the paper for the full caption.

RAS Journals@rasjournals· Jul 3

Today is the last day of the RAS @royalastrosoc.bsky.social and OUP @academic.oup.com presence at EAS 2026 @eas-meeting.bsky.social . Drop by our stands today to learn more about publishing in our journals. We look forward to seeing you at NAM in Birmingham July 20-24.

RAS Journals@rasjournals· Jul 2

Published in #GJI Geophysical Journal International: "High-speed train elastic full waveform inversion over viaducts: new source implementation and resulting near-surface multiparameter resolution", He et al. Please visit academic.oup.com/gji/article/... to read the paper @royalastrosoc.bsky.social

Schematic illustration of an HST moving on a viaduct comparing three source models. Please see the paper for the full caption.

RAS Journals@rasjournals· Jul 2

Alice Power will be representing RAS Journals and in particular our journal RAS Techniques and Instruments #RASTI at the SPIE conference spie.org/conferences-... 5-10 July. Speak to her to learn more about the journal! @royalastrosoc.bsky.social @academic.oup.com

RAS Journals@rasjournals· Jul 1

Joop Schaye, a #MNRAS Scientific Editor, dropped by the RAS stand at EAS 2026. @royalastrosoc.bsky.social @eas-meeting.bsky.social

RAS Journals@rasjournals· Jul 1

The RAS Techniques & Instruments article "A brief review of contrastive learning applied to astrophysics" by Huertas-Company et al, is proving very popular in conversation at @eas-meeting.bsky.social , #RASTI deputy editor-in-chief Anna Scaife reports. Read it here: academic.oup.com/rasti/articl...

Figure 6.Application of contrastive learning for similarity search of galaxy images with similar morphological features. The leftmost image shows a galaxy candidate and the others are similar image candidates based on the representations. Figure adapted from Stein et al. (2021).

RAS Journals@rasjournals· Jul 1

Left to right, RAS Journals Head of Publishing Liz Baker and RASTI Deputy Editor in Chief Anna Scaife at the RAS stand at EAS 2026. @royalastrosoc.bsky.social @eas-meeting.bsky.social

RAS Journals@rasjournals· Jul 1

Published in #MNRAS: "Cold versus hot gas accretion and angular momentum in FIRE simulations: from halo to galaxy scales", Sultan et al. This is Fig. 1: please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com

Gas temperature maps for two representative FIRE haloes in the analysis set: m12i (top) and m13A4 (bottom). Please see the paper for the full caption.

RAS Journals@rasjournals· Jul 1

Published in #GJI: "Estimating ocean tidal loading and sea level variability in the northern Adriatic using GNSS positioning, tide gauges and GNSS reflectometry", Fantoni et al. This is Fig. 1: please visit academic.oup.com/gji/article/... to read the paper. @royalastrosoc.bsky.social

Map of the study area showing the spatial distribution of the selected GNSS and tide gauge stations along the Adriatic region. Circles indicate the observed GNSS stations, squares indicate the fiducial GNSS network stations, and triangles indicate the tide gauge stations.

RAS Journals@rasjournals· Jun 30

Published in #MNRAS: "Discovery of a nebula associated with a high proper motion sdB star", Ortiz et al. This is Fig. 4: please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com

RGB composite colour picture-centred of TYC 3315 with WISE W1 in red, TST Halpha + [N II] in green, and GALEX FUV in blue. The FoV is ⁠10 arcmin x 10 arcmin, and north is up, east to the left.

RAS Journals@rasjournals· Jun 30

Published in #GJI Geophysical Journal International: "Wave patterns in a shear zone undergoing flash heating in earthquake-like discrete element models", Taboada et al. This is Fig. 1: please visit academic.oup.com/gji/article/... to read the paper. @royalastrosoc.bsky.social @academic.oup.com

Computational model and contact laws for cohesive granular materials. Please see the paper for the full caption.

RAS Journals@rasjournals· Jun 29

Published in #MNRAS: "COSMOS-Web: star formation along the early Hubble sequence and the evolution of dust over the redshift range 0‌‌‌‌ <‌ z < 12", Eales et al. This is Fig. 1: please visit academic.oup.com/mnras/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com

RAS Journals@rasjournals· Jun 29

Published in #GJI Geophysical Journal International: "Enigmatic doublets at the 410-km discontinuity evidence for drip tectonics?", Kind et al. This is Fig. 1: please visit academic.oup.com/gji/article/... to read the paper. @royalastrosoc.bsky.social @academic.oup.com

(a) Simplified tectonic map of the study area. STZ: Sorgenfrei-Tornquist Zone, TESZ: Trans-European Suture Zone, THOR: Thor Suture, VF: Variscan Front (eastern part from S. Mazur et al. 2020), EL: Elbe Line, RS: Rheic Suture, STS: Saxo-Thuringian Suture, AF: Alpine Front, AP: Apenninic Front, AS: Alpine Suture, TIB: Trans-Scandinavian Igneous Belt, BM: Bohemian Massif, MC: Massif Central, VR: Vrancea earthquake zone, RM: Rhenish Massif, Ei: Eifel volcanic fields, EEP: East European Platform. (b) Map of all teleseismic events used. (c) Map of seismic stations used. (d) Piercing points of S-to-P converted teleseismic waves at 410 km depth for all seismic traces available.

RAS Journals@rasjournals· Jun 29

Published in #RASTI RAS Techniques & Instruments: "Dynamic range beyond bit depth of a CMOS image sensor using interleaved row readout", Ghosh et al. This is Fig. 1: please visit academic.oup.com/rasti/articl... to read the paper. @royalastrosoc.bsky.social @academic.oup.com

The experimental setup used for the CIS120 investigation in the laboratory is shown. The left image shows the front side of the camera, while the right image displays the back side.

RAS Journals@rasjournals· Jun 29

RAS Journals and @royalastrosoc.bsky.social are at the EAS. Come and visit our stand! Pictured left to right, Marieta Valdivia Lafort and Pam Rowden.