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Jeff Mangum

@jeffreygmangum.bsky.social

Astronomer, Editor for Publications of the Astronomical Society of the Pacific (PASP)

21 Followers  |  26 Following  |  12 Posts  |  Joined: 11.12.2024  |  1.92

Latest posts by jeffreygmangum.bsky.social on Bluesky

Thermophysical model fits for (a) NEO Surveyor photometry only, (b) Roman photometry only, and (c) combined NEO Surveyor and Roman photometry.  From Holler etal (2025)

Thermophysical model fits for (a) NEO Surveyor photometry only, (b) Roman photometry only, and (c) combined NEO Surveyor and Roman photometry. From Holler etal (2025)

In a recent article published in @paspjournal.bsky.social an assessment of the capabilities of the @nasaromantelescope.bsky.social as a planetary defense asset is presented. iopscience.iop.org/article/10.1...

30.10.2025 21:09 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
A demonstration of the thermal drift correction system.  From Fuentes etal (2025)

A demonstration of the thermal drift correction system. From Fuentes etal (2025)

In a recent open-access article published in @paspjournal.bsky.social a method for modeling the environmental drift within high-resolution spectrographs to enhance radial velocity precision is presented. iopscience.iop.org/article/10.1...

30.10.2025 21:02 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Examples of synthetic folded lightcurves with varying true-positive rates.  From Chang etal (2025)

Examples of synthetic folded lightcurves with varying true-positive rates. From Chang etal (2025)

A recent article published in @paspjournal.bsky.social presents an analysis of an algorithm for selecting reliable rotation periods of small solar system bodies. iopscience.iop.org/article/10.1...

30.10.2025 20:56 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Mean vertical profiles of temperature (a) and humidity (b) between 2022 November 30, and 2022 December 16. Black and red lines represent the ascent and descent from the Gill station, blue/violet and green/light blue correspond to iMet and TSM weather sensor systems, respectively.  From Medlej etal (2025)

Mean vertical profiles of temperature (a) and humidity (b) between 2022 November 30, and 2022 December 16. Black and red lines represent the ascent and descent from the Gill station, blue/violet and green/light blue correspond to iMet and TSM weather sensor systems, respectively. From Medlej etal (2025)

In a recent open-access article published in @paspjournal.bsky.social a demonstration of the characterization of observatory ground-layer turbulence using an instrumented drone is presented. iopscience.iop.org/article/10.1...

30.10.2025 20:45 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Top: a depiction of the four axisymmetric morphologies used in this study, representing contours of the density cut in the xz-plane. Bottom: volume rendering of the density for a TP1 model.  From King etal (2025).

Top: a depiction of the four axisymmetric morphologies used in this study, representing contours of the density cut in the xz-plane. Bottom: volume rendering of the density for a TP1 model. From King etal (2025).

An open-access article published in @paspjournal.bsky.social presents an analysis of kilonova simulations within an inference pipeline to assess neutron star merger ejecta morphology constrained by @vrubinobs.bsky.social and @nasawebb.extwitter.link measurements. iopscience.iop.org/article/10.1....

30.10.2025 20:35 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
JWST/NIRCam images of Boo I wide binary candidates in the F150W filter.  From Shariat etal (2025).

JWST/NIRCam images of Boo I wide binary candidates in the F150W filter. From Shariat etal (2025).

A recent open-access article published in @paspjournal.bsky.social reports the discovery and characterization of a wide binary population in ultra-faint dwarf galaxy Bootes I using JWST NIRCam imaging, placing limits on primordial black hole dark matter. iopscience.iop.org/article/10.1...

28.10.2025 14:36 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
The next-generation fiber positioner in LAMOST has two rotational axes, driven by independent gear motors. Three positioners form a set with an
electronics board.  From Chen etal (2025).

The next-generation fiber positioner in LAMOST has two rotational axes, driven by independent gear motors. Three positioners form a set with an electronics board. From Chen etal (2025).

A recent article published in @paspjournal.bsky.social describes an integrated collision-aware target assignment and motion planning system for fiber positioners in multi-object spectrographs. iopscience.iop.org/article/10.1...

23.10.2025 16:44 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Schematic diagram of an asymmetric common path coherent dispersion spectrometer.  From Fan, Wei, & Yu (2025).

Schematic diagram of an asymmetric common path coherent dispersion spectrometer. From Fan, Wei, & Yu (2025).

A recent article published in @paspjournal.bsky.social presents an analysis of a high-precision radial velocity retrieval method using an individual narrow spectral line from a coherent-dispersion spectrometer (CODES). iopscience.iop.org/article/10.1...

23.10.2025 16:37 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Candidate 1. Shown is the candidate in SuperCosmos scans of POSS-I red (left) and POSS-II red (right) images (inverted). Transients are marked with blue circles. The candidate with a measured coordinate is marked with a cross (+). Pink circles show defects. Also the gray line crossing the POSS-I field is a scanning defect. Four transients are visible in the POSS-I image, where three follow a straight line. Box size is 10 Γ— 10 arcmin^2.  From Villarroel etal (2025).

Candidate 1. Shown is the candidate in SuperCosmos scans of POSS-I red (left) and POSS-II red (right) images (inverted). Transients are marked with blue circles. The candidate with a measured coordinate is marked with a cross (+). Pink circles show defects. Also the gray line crossing the POSS-I field is a scanning defect. Four transients are visible in the POSS-I image, where three follow a straight line. Box size is 10 Γ— 10 arcmin^2. From Villarroel etal (2025).

A recent open-access article published in @paspjournal.bsky.social presents an analysis of aligned multiple-transient events extracted from the first Palomar Sky Survey photographic plates. iopscience.iop.org/article/10.1...

21.10.2025 18:18 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
ZTF and neoWISE lightcurves for NGC6833.  From Bhattacharjee etal (2025).

ZTF and neoWISE lightcurves for NGC6833. From Bhattacharjee etal (2025).

In a recent open-access article published in @paspjournal.bsky.social an analysis of the variability of central stars of planetary nebulae on timescales from months to years as measured with the Zwicky Transient Facility is presented. iopscience.iop.org/article/10.1...

21.10.2025 18:10 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
The F1-score and number of BSS instances across data sets with different SNRs.  From Lv etal (2025)

The F1-score and number of BSS instances across data sets with different SNRs. From Lv etal (2025)

In a recent article published in @paspjournal.bsky.social an identification algorithm for blue straggler stars based on multiscale dilation and attention mechanisms is presented and analyzed. iopscience.iop.org/article/10.1...

16.10.2025 23:36 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Hourly PWV (a) and temperature (b) distributions at Delingha from ERA5 data (1984–2023), shown as histograms (red) and cumulative curves (blue).  From Lu etal (2025)

Hourly PWV (a) and temperature (b) distributions at Delingha from ERA5 data (1984–2023), shown as histograms (red) and cumulative curves (blue). From Lu etal (2025)

A recent article published in @paspjournal.bsky.social presents an analysis of long-term trends in precipitable water vapor and temperature at the Delingha Observatory. iopscience.iop.org/article/10.1...

16.10.2025 23:28 β€” πŸ‘ 3    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Distributions of orbital period and component masses of WD+MS binaries, with periods between 100 and 1000 days and at distances within 500pc, at different stages in the presented analysis: the full simulated WD+MS binary population, systems that enter the mock NSS catalog, those in the non-class-I sample, and lastly, those in the NCE sample.  From Yamaguchi, El-Badry & Shahaf (2025)

Distributions of orbital period and component masses of WD+MS binaries, with periods between 100 and 1000 days and at distances within 500pc, at different stages in the presented analysis: the full simulated WD+MS binary population, systems that enter the mock NSS catalog, those in the non-class-I sample, and lastly, those in the NCE sample. From Yamaguchi, El-Badry & Shahaf (2025)

A recent open-access article published in @paspjournal.bsky.social evaluates population demographics of White Dwarf binaries with intermediate separations, placing constraints on post-AGB mass transfer through Gaia measurements. iopscience.iop.org/article/10.1...

16.10.2025 23:19 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Left: the star-forming main sequence of the LSB galaxy sample and fitted linear regression (colored circles, solid red line) compared to the comparison sample and best fit (gray circles, solid black line). The standard intrinsic scatter (0.3 dex) is shown as the shaded red area. Right: the distribution of delta-MS or the deviation from the comparison sample star-forming main sequence best fit.  From Christie, Bamby & Young (2025)

Left: the star-forming main sequence of the LSB galaxy sample and fitted linear regression (colored circles, solid red line) compared to the comparison sample and best fit (gray circles, solid black line). The standard intrinsic scatter (0.3 dex) is shown as the shaded red area. Right: the distribution of delta-MS or the deviation from the comparison sample star-forming main sequence best fit. From Christie, Bamby & Young (2025)

A recent open-access article published in @paspjournal.bsky.social utilizes the well-studied Star-forming Main Sequence and integrated Kennicutt–Schmidt Relations to characterize star formation in the low surface brightness regime of galaxies. iopscience.iop.org/article/10.1...

16.10.2025 19:07 β€” πŸ‘ 2    πŸ” 2    πŸ’¬ 0    πŸ“Œ 0
A comparison of the difference between the second integration rate image and the first integration rate image (i.e., subtracting the first from the second after a slope fit to all frames within each integration), before and after an Reset Switch Charge Decay correction.  From Ressler etal (2025)

A comparison of the difference between the second integration rate image and the first integration rate image (i.e., subtracting the first from the second after a slope fit to all frames within each integration), before and after an Reset Switch Charge Decay correction. From Ressler etal (2025)

A recent open-access article published in @paspjournal.bsky.social investigates the reset switch charge decay effect in JWST/MIRI observations. iopscience.iop.org/article/10.1...

14.10.2025 13:55 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Left: Vector point diagram for the sample of stars selected using method M1 (25 pc around center of NAP) with colorbars indicating the corresponding distance in pc.  Middle: Distance histograms for stars within the two kinematic boxes; there are no clear peaks in the distribution. Right: Image of the NAP region in infrared WISE bands 22, 12 and 3.4 ΞΌm mappedtoR,G,B.  From Roychowdhury & Hillenbrand (2025)

Left: Vector point diagram for the sample of stars selected using method M1 (25 pc around center of NAP) with colorbars indicating the corresponding distance in pc. Middle: Distance histograms for stars within the two kinematic boxes; there are no clear peaks in the distribution. Right: Image of the NAP region in infrared WISE bands 22, 12 and 3.4 ΞΌm mappedtoR,G,B. From Roychowdhury & Hillenbrand (2025)

A recent open-access article published in @paspjournal.bsky.social investigates the kinematic association of known FU Orionis stars with the young clusters in the Cygnus region of the Galaxy. iopscience.iop.org/article/10.1...

14.10.2025 13:46 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Targets in all tiers of our catalog plotted in distance vs. luminosity space, with the tiers indicated by color.  From Tuchow etal (2025).

Targets in all tiers of our catalog plotted in distance vs. luminosity space, with the tiers indicated by color. From Tuchow etal (2025).

In a recent article published in @paspjournal.bsky.social a prioritized community list of potential stellar targets for the Habitable Worlds Observatory's (HWO) ExoEarth survey is derived and presented. iopscience.iop.org/article/10.1...

09.10.2025 14:38 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Mass coordinate of the convective zones (gray) and radiative zones (white) for the different starting periods.  From Larsen & MacDonald (2025).

Mass coordinate of the convective zones (gray) and radiative zones (white) for the different starting periods. From Larsen & MacDonald (2025).

A recent article published in @paspjournal.bsky.social presents an analysis of the role that the convective kissing instability plays in cataclysmic variable evolution. iopscience.iop.org/article/10.1...

09.10.2025 14:30 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Distribution of asteroids and dust in the inner solar system.  From Wyatt etal (2025).

Distribution of asteroids and dust in the inner solar system. From Wyatt etal (2025).

A recent open-access topical review published in @paspjournal.bsky.social presents a detailed review of the theory of exozodi sources and dust evolution. iopscience.iop.org/article/10.1...

09.10.2025 12:56 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Light curve for lensing event KMT-2024-BLG-2017.  From Han etal (2025).

Light curve for lensing event KMT-2024-BLG-2017. From Han etal (2025).

In a recent article published in @paspjournal.bsky.social an analysis of three binary-source binary-lens microlensing events from the 2024 OGLE and KMTN measurement campaign is presented. iopscience.iop.org/article/10.1...

07.10.2025 16:27 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Testing result for orbital period and uncertainty evolution of the HD 134987 c planet based on synthetic RVs.  From Li etal (2025).

Testing result for orbital period and uncertainty evolution of the HD 134987 c planet based on synthetic RVs. From Li etal (2025).

In a recent open-access article published in @paspjournal.bsky.social radial velocity strategies for the orbital refinement of exoplanet direct imaging targets are discussed and analyzed. iopscience.iop.org/article/10.1....

07.10.2025 16:18 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Zoomed-in view of multi-band light curves and polarization degree for selected flare events of four blazars.  From Yang & Jiang (2025).

Zoomed-in view of multi-band light curves and polarization degree for selected flare events of four blazars. From Yang & Jiang (2025).

In a recent article published in @paspjournal.bsky.social an analysis of the spectrum and polarization variation on short timescales within four luminous Blazars is presented. iopscience.iop.org/article/10.1...

07.10.2025 16:12 β€” πŸ‘ 2    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Illustration of the temperature structure, dust distribution, and observational constraints in protoplanetary disks from Miotello et al. (2023); Credit: T. Birnstiel.

Illustration of the temperature structure, dust distribution, and observational constraints in protoplanetary disks from Miotello et al. (2023); Credit: T. Birnstiel.

A recent open-access tutorial published in @paspjournal.bsky.social presents an introduction to dust evolution and vertical transport in protoplanetary disks. iopscience.iop.org/article/10.1...

07.10.2025 16:05 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
NIRC2 images (top row), best-fit PRIME PSFs (middle row) and resultant residuals (bottom row).  From Sabhlok etal (2025).

NIRC2 images (top row), best-fit PRIME PSFs (middle row) and resultant residuals (bottom row). From Sabhlok etal (2025).

A recent open-access article published in @paspjournal.bsky.social presents a validation of the on-axis point spread function reconstruction for the Keck adaptive optics system. iopscience.iop.org/article/10.1...

02.10.2025 14:16 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
The observed distribution of donor stars in XRBs.  From Zhang etal (2025).

The observed distribution of donor stars in XRBs. From Zhang etal (2025).

A recent article published in @paspjournal.bsky.social presents a study of the donor star population in x-ray binaries, arguing for the existence of a bimodal distribution. iopscience.iop.org/article/10.1...

02.10.2025 14:09 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Evolutionary tracks of the companion stars (ranging from 30 to 80 MβŠ™) and the primary star (100 MβŠ™) from ZAMS to the WR phase at Galactic metallicity using the MLT++ formalism.  From Mukhija & Kashi (2025).

Evolutionary tracks of the companion stars (ranging from 30 to 80 MβŠ™) and the primary star (100 MβŠ™) from ZAMS to the WR phase at Galactic metallicity using the MLT++ formalism. From Mukhija & Kashi (2025).

In a recent open-access article published in @paspjournal.bsky.social an analysis of the dependency on mass ratio and orbital period of wind accretion in massive binaries experiencing high mass loss rates is presented. iopscience.iop.org/article/10.1...

02.10.2025 14:01 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Examples of large cosmic ray hit morphologies on NIRSpec images.  From Rauscher & Fixsen (2025).

Examples of large cosmic ray hit morphologies on NIRSpec images. From Rauscher & Fixsen (2025).

A recent article published in @paspjournal.bsky.social presents measurements of the JWST Near Infrared Spectrograph (NIRSpec) cosmic ray hit rate, including a prediction for the incidence of NIRSpec cosmic ray encounters through the 2030s. iopscience.iop.org/article/10.1...

30.09.2025 12:54 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Architecture of the QTT Wanxiang digital backend.  From Pei etal (2025)

Architecture of the QTT Wanxiang digital backend. From Pei etal (2025)

A recent article published in @paspjournal.bsky.social describes advances in the design, implementation and verification of the Xinjiang Qitai Radio Telescope (QTT) digital backend system. iopscience.iop.org/article/10.1...

30.09.2025 12:42 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
Image segmentation results from real observational data collected by the Mini-SiTian Array No. 3 telescope at the Xinglong Observatory.  From Chen etal (2025)

Image segmentation results from real observational data collected by the Mini-SiTian Array No. 3 telescope at the Xinglong Observatory. From Chen etal (2025)

In a recent article published in @paspjournal.bsky.social an algorithm which uses a U-Net deep neural network and line segment detector algorithm to identify artificial satellite trails in ground-based photometric imaging is presented and analyzed. iopscience.iop.org/article/10.1...

30.09.2025 12:34 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0
A comparison of the FOV (Ξ©) and light collecting area of the primary mirror (A) highlighting the Γ©tendue (AΞ©) of past, current, and future time-domain surveys.  From Miller etal (2025).

A comparison of the FOV (Ξ©) and light collecting area of the primary mirror (A) highlighting the Γ©tendue (AΞ©) of past, current, and future time-domain surveys. From Miller etal (2025).

A recent open-access article published in @paspjournal.bsky.social describes the La Silla Schmidt Southern Survey (LS4), a wide-field time-domain survey that will be conducted with the 1m ESO Schmidt telescope. iopscience.iop.org/article/10.1....

30.09.2025 12:24 β€” πŸ‘ 1    πŸ” 1    πŸ’¬ 0    πŸ“Œ 0

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