Publications of the Astronomical Society of the Pacific (PASP)

Model consistency check, showing the color-magnitude diagram of known-carbon star candidates. From Munoz etal (2026)

A recent open-access article published in @PASPJournal describes an efficient framework for automatic carbon star detection using machine learning techniques on LAMOST DR9 and Gaia DR3 measurements. iopscience.iop.org/article/10.1...

The normalized probability density of the CMB optical depth τ across the entire data set of 1000 simulations generated for this study. From Farhadi Khouzani etal (2026).

A recent open-access article published in @PASPJournal presents a machine learning-driven analysis of kinetic Sunyaev-Zel'dovich (kSZ) effect maps to predict the Cosmic Microwave Background (CMB) optical depth. iopscience.iop.org/article/10.1...

External view of the H-455 intelligent CMOS mosaic camera. From Chen etal (2026).

A recent article published in @paspjournal.bsky.social presents a performance study of an intelligent astronomical CMOS mosaic camera. iopscience.iop.org/article/10.1...

An example of the spectral line analysis capabilities of CARTA. From Wang etal (2026).

A recent open-access article published in @paspjournal.bsky.social describes CARTA, the Cube Analysis and Rendering Tool for Astronomy. iopscience.iop.org/article/10.1...

Incident flux in S_earth received by planets orbiting M-dwarfs in systems where at least one planet resides in the habitable zone as a function of their host star’s effective temperature. TOI-700 is shown as red-filled stars. Nelson and Becker (2026).

A recent open-access article published in @paspjournal.bsky.social presents an analysis of the dynamical interactions and habitability of the planets in the TOI-700 multi-planet system. iopscience.iop.org/article/10.1...

The 2025 August 19 a stack of 16x60 second exposures of 3I/ATLAS cropped to a field of view of 32.5×21.7 arcmin. From Wesolowski etal (2026).

A recent open-access article published in @paspjournal.bsky.social presents a photometric analysis of the interstellar comet 3I/ATLAS during its pre-perihelion period. iopscience.iop.org/article/10.1...

Sample bolometric light curve measurements analyzed in this study, with fits using semi-analytical models. From Das etal (2026).

A recent open-access article published in @paspjournal.bsky.social presents a light curve analysis of the low-luminosity Type IIP supernovae measured in the Zwicky Transient Facility Census of the Local Universe survey. iopscience.iop.org/article/10.1...

High-resolution UVES spectrum (black) and best-fit (red) of Kappa Velorum. From Rowan, Kraus and Thompson (2026).

A recent open-access article published in @paspjournal.bsky.social describes a recent VLTI/GRAVITY study of Kappa Velorum, one of the brightest stars in the Southern sky, which has allowed for the characterization of its luminous companion. iopscience.iop.org/article/10.1...

Observed stripped-star candidates in the SMC (left) and LMC (right). From Blomberg etal (2026).

A recent open-access article published in @paspjournal.bsky.social describes a forward modeling analysis of the observed population of intermediate-mass stripped stars in the Magellanic Clouds discovered via their UV excess. iopscience.iop.org/article/10.1...

Example light curves for several of the sources analyzed. From El-Badry, Hogg, and Rix (2026).

A recent open-access article published in @paspjournal.bsky.social describes and analyzes the observation that Active Galactic Nuclei (AGN) do not exhibit strictly sinusoidal brightness variations. iopscience.iop.org/article/10.1...

The Solirad (So) as a Convenient Unit for Quoting Astronomical Irradiances for Planetary Insolations and Exoplanetary Instellations The Solirad (So) as a Convenient Unit for Quoting Astronomical Irradiances for Planetary Insolations and Exoplanetary Instellations, Mamajek, Eric E., Wright, Jason T., Tuchow, Noah W., Young, Patrick A., Kenworthy, Matthew A., Gilbert, Emily A.

In a recent open-access article published in @paspjournal.bsky.social the Solirad (So) is proposed and described as a convenient standard unit for quoting astronomical irradiance, simplifying irradiance units used in planetary and exoplanetary studies. iopscience.iop.org/article/10.1...

The R2Pub telescope system. From Song etal (2026).

A recent article published in @paspjournal.bsky.social presents a design overview and performance evaluation of the R2Pub telescope system. iopscience.iop.org/article/10.1...

Two-WFS control improves performance at X in the presence of strong NCP errors. The optimal closed-loop error (in rad rms) for the double IC-HPF scheme (in orange) is lower than that for the single IC (in green) when NCP aberrations are stronger (lower NCP r0). From Sengupta etal (2026).

A recent open-access article published in @paspjournal.bsky.social presents an analysis of control algorithms for dual-wavefront sensor single-conjugate adaptive optics systems. iopscience.iop.org/article/10.1...

Digitized image of astronomical plate BJ8204DA3376001. Left: full plate with angular size 8.1 x 8.1 arcsec. Right: a magnification of the plate’s central area with angular size 25 x 25 arcmin. From Shang etal (2026).

A recent open-access article published in @paspjournal.bsky.social describes the performance of a new astronomical plate digitizer at the Shanghai Astronomical Observatory. iopscience.iop.org/article/10.1...

Schematic view of the full experimental clock comparison setup. From Negusini etal (2026).

In a recent open-access article published in @paspjournal.bsky.social the results from an intercontinental metrological clock comparison using geodetic K-band VLBI measurements is presented. iopscience.iop.org/article/10.1...

The GP method (orange) effectively removes the host galaxy contamination in the nebular-phase spectrum of SN2019eix, where as the spectrum extracted with the classic methods (blue and green) suffers an over-subtraction, which hinders detailed emission line modeling. From Liu and Miller (2026).

A recent open-access article published in @paspjournal.bsky.social presents a novel host galaxy subtraction technique for long-slit spectroscopy measurements of extragalactic transients, implemented in the publicly-available HostSub_GP package. iopscience.iop.org/article/10.1...

Light curve of the microlensing event KMT-2020-BLG-0202. The bottom panel presents the overall light curve, while the two upper panels show the zoomed-in view of the anomaly region and the residuals from the best-fit model (solid curve). From Han etal (2026).

A recent article published in @paspjournal.bsky.social presents the discovery of four cold super-Jupiter exoplanets as revealed by their extended and complex microlensing signals. iopscience.iop.org/article/10.1...

Observed spectra of three targets (gray) compared with synthetic spectra generated using their best-fit stellar parameters (pink; Section 4.1). From Yamaguchi etal (2026).

A recent open-access article published in @paspjournal.bsky.social presents an analysis of the chemical signatures of AGB mass transfer in Gaia White Dwarf star binary companions. iopscience.iop.org/article/10.1...

Volume 1, Issue 1 of PASP.

Happy 137th Birthday to the Astronomical Society of the Pacific (ASP)! Volume 1, Issue 1 of the @paspjournal.bsky.social , published on February 7, 1889, includes the minutes of that inaugural meeting of the 40 original members of the ASP. iopscience.iop.org/article/10.1...

The unsupervised machine learning analysis of FRB 20220912A. The clustering of possible emission mechanisms shown is consistent with previous studies of FRBs. From Hsu etal (2026).

A recent open-access article published in @paspjournal.bsky.social describes the results from an unsupervised machine learning study of the emission mechanisms that produce the repeating fast radio burst source FRB 20220912A. iopscience.iop.org/article/10.1...

The combined extinction curves from PSG (including Ozone and Rayleigh scattering) for all nights is shown as the gray lines. Also shown is the 4 bands indicated both by the entire band, and by the crosses on the line indicating the value at our best estimate of the effective center of the band. It can be seen there is some variance in the PSG estimated scattering over the nights of observation. From Pedersen etal (2026).

A recent open-access article published in @paspjournal.bsky.social describes and analyzes the aerosol monitoring requirements that will allow for millimagnitude photometry at the @vrubinobs.bsky.social . iopscience.iop.org/article/10.1...

Multiwavelength light curves and polarization degree (PD) of OJ 248 at different frequencies during MJD 55500-57000. From Pu etal (2026).

In a recent article published in @paspjournal.bsky.social an analysis of the multi-wavelength flux and polarization variability of the radio quasar OJ 248 during its 2011-2014 outburst is presented. iopscience.iop.org/article/10.1...

Coverage and rate limits for the DN-GPS pilot survey. From Sherman etal (2026).

A recent open-access article published in @paspjournal.bsky.social describes the Not-So-Fast Radio Burst (NSFRB) search pipeline for the Deep Synoptic Array's (DSA-110) radio telescope. iopscience.iop.org/article/10.1...

Photometric measurements of 3I/ATLAS near perihelion. From Zhang & Battams (2026).

In a recent open-access article published in @paspjournal.bsky.social photometric measurements of the interstellar comet 3I/ATLAS during a period of rapid brightening ahead of its perihelion passage are presented and analyzed. iopscience.iop.org/article/10.1...

Permeability of desiccated granular material versus thickness of the layer. From Kossacki etal (2026)

A recent open-access article published in @paspjournal.bsky.social describes new laboratory measurements of vapor pressure between sand-ice agglomerates to better understand degassing in comet analogs. iopscience.iop.org/article/10.1...

The spherical coordinates of the polarization vector S. From van Straten (2026)

A recent open-access tutorial published in @paspjournal.bsky.social provides a review of the mathematical foundations of single-antenna radio astronomical polarimetry. A must-read reference for students interested in astronomical polarimetry. iopscience.iop.org/article/10.1...

Comparative accuracy and F1-score of MSIHP-Net and baseline models for different data sets. From Yang etal (2026).

A recent open-access article published in @paspjournal.bsky.social presents a multiscale deep learning method for identifying Green Pea galaxies. iopscience.iop.org/article/10.1...

Top: sky distribution of WDs, showing the RoboPol sample (orange triangles, Żejmo et al. 2016). High-probability (PWD >0.99) WD candidates with RP magnitude smaller than 17 from the Gaia EDR3 catalog are indicated by blue markers. Bottom: PD (Żejmo et al. 2016) versus Gaia DR3 RP magnitude. Lines represent the MDP curves for LAST-P given various exposure times, as indicated. From Barbosa Martins etal (2026)

A recent open-access article published in @paspjournal.bsky.social presents an analysis of the capabilities of a large field-of-view polarization survey with the Large Array Survey Telescope Polarization Node (LAST-P). iopscience.iop.org/article/10.1...

Transmission and off-band blocking of the NOTCam Z band and the NOTCam Z band in combination with KDP used in this study (a). An optimized Z band coating design utilizing KDP as a short pass filter “glass” is illustrated (b) Optical density of the NOT #237 Zband without KDP (gray), with KDP (black), and an optimized Z band coating (blue). From Viuho etal (2026).

A recent open-access article published in @paspjournal.bsky.social presents an analysis of a monopotassium dihydrogen phosphate (KDP) based filter for telluric emission filtering of near- and short-wave infrared (0.7 to 2.5 micron) ground-based measurements. iopscience.iop.org/article/10.1...