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astro-ph.SR2026

SN 2021pfs: A Type Ia Supernova Likely Affected by Progenitor Metallicity, as Revealed by Comparison with Its Twin Counterpart

Abdusamatjan Iskandar, Xiaofeng Wang, Ali Esamdin +16

We present extensive photometric and spectroscopic observations of the normal type Ia supernovae (SNe Ia) 2021pfs, which occurred in the Seyfert 2 galaxy NGC 5427 at a redshift 0.0…

astro-ph.SR2026

The Carbon Giant Population Revealed by Gaia DR3

Benjamin R. Roulston, Paul J. Green

Classical carbon stars (atmospheric C/O >1) are asymptotic giant branch (AGB) stars that become carbon-rich through third dredge-up during the thermally pulsing AGB phase. However,…

astro-ph.SR2026

Magnetic fields in Massive Star-Forming Regions (MagMaR). VIII. Magnetic field overrun by gravity in GGD 27's accretion streamers

M. Fernández-López, J. A. López-Vázquez, J. M. Girart +20

Context. Accretion streamers connected to protostellar disks and/or envelopes are thought to transport material across several thousand of au. Whether the motions of the gas compri…

astro-ph.SR2026

A millimeter Survey for Disks around Herbig Be Stars

David J. Wilner, Joshua Bennett Lovell, Sean M. Andrews +3

We present a survey of 24 Herbig Be stars (young stellar objects M) within 3 kpc at 1.3~millimeters using the Submillimeter Array at about resolution to identi…

astro-ph.SR2026

On the Nature of Candle-Flame-Shaped Solar Flares and Sub-Alfvénic Supra-Arcade Plasma Downflows

Ivan Oparin, Sabastian Fernandes, Bin Chen +4

Certain solar flares exhibit a distinctive candle-flame or cusp-shaped feature above the bright flare arcade visible in extreme ultraviolet (EUV) and X-ray channels sensitive to hi…

astro-ph.SR2026★ 1 cited

A Probabilistic Calibration Procedure for the CORSAIR Polarimeter

Alan Hsu, Jenna Samra, Steven Tomczyk +1

We present a novel Bayesian model and a corresponding robust, probabilistic calibration procedure for the CORSAIR polarimeter that can be applied to other polarimeters. Our calibra…

astro-ph.SR2026

OH/IR stars in the inner Galactic bulge: I. Colour, CO line, and stellar light curve characteristics

H. Olofsson, T. Khouri, S. Muller +11

Stars on the asymptotic giant branch (AGB) play important roles in a number of astronomical contexts. To quantify these roles, it is necessary to establish the mass-loss characteri…

astro-ph.SR2026

Pushing the Limit of Asteroseismic Detection for Cool Dwarfs using TESS and Deep Learning

Waly M Z Karim, Rocio Kiman, Derek Buzasi +6

Asteroseismology provides a powerful probe of stellar interiors by detecting stellar oscillations, including solar-like oscillations, which are stochastically excited by near-surfa…

astro-ph.SR2026

A Parameterized YSO Accretion Disk Model with Increasing Accretion Rate: Predicted Outburst Lightcurves

Gautam Das, Lynne A. Hillenbrand, Adolfo S. Carvalho

A sub-class among Young Stellar Objects (YSOs), known as FU Ori type stars, undergo sudden rises in luminosity by several orders of magnitude on timescales of a few months to a few…

astro-ph.SR2026

Energy Evolution from the Chromosphere to the Heliosphere in the 2021 October 28 Solar Eruption

Katharine K. Reeves, Daniel B. Seaton, Cynthia Cattell +20

We perform a detailed study of the energetics for a well-observed solar eruption and flare that occurred on 28 October 2021. This event included a GOES class X1.0 flare, a global E…

astro-ph.SR2026

A Minute-Cadence Deep Bulge Survey: First Data Release of DREAMS

Hongjing Yang, Weicheng Zang, Francisco Valdes +31

The DECam Rogue Earths and Mars Survey (DREAMS), a NOIRLab survey program, has been conducting a three-year survey covering a 5 deg area in the Galactic bulge (roughly spanning…

astro-ph.SR2026★ 1 cited

Multi-Viewpoint Observation of a Failed Prominence Eruption on the Sun

Tingyu Gou, Katharine K. Reeves, Peter R. Young +5

Solar eruptions are sudden ejections of coronal mass and magnetic fields accompanied by intense energy release. The eruptive structure does not always erupt successfully, but somet…

astro-ph.SR2026★ 1 cited

Dynamical masses of young stellar objects with the VLBA: DYNAMO-VLBA: Radio binary stars in Orion

Sergio A. Dzib, Jazmín Ordóñez-Toro, Laurent Loinard +9

We present results from a multi-epoch Very Long Baseline Array (VLBA) survey conducted as part of the DYNAMO-VLBA project, aimed at measuring the dynamical masses of young stellar…

astro-ph.SR2026

Detection of a weak magnetic field in the Balmer emission line white dwarf WDJ1653-1001

Abbigail Elms, Stefano Bagnulo, Pier-Emmanuel Tremblay +8

The small DAHe and DAe spectral classes comprise isolated, hydrogen-dominated atmosphere white dwarfs that exhibit variable photometric flux and Balmer line emission. These mysteri…

astro-ph.SR2026

Unveiling Dominant Toroidal Magnetic Fields in a Protostellar Outflow

Tao-Chung Ching, Zhi-Yun Li, Qizhou Zhang +6

Magnetic fields play a fundamental role in the formation of protostellar winds. In the magneto-centrifugal models, poloidal magnetic fields launch winds from accretion disks, and f…

astro-ph.SR2026

Two Be or Not Two Be: A New Companion detection for HD 52244 using HST/FGS

Keefe J. Kamp, Saida M. Caballero-Nieves, Edmund P. Nelan +3

In this paper we present a newly detected companion to the Be star, HD 52244 (B2IVnpe), using the Fine Guidance Sensors (FGSs) on the Hubble Space Telescope (HST). In fall 2021, HS…

astro-ph.SR2026

Anti-Solar Differential Rotation May Have Revived Magnetic Braking in the Subgiant 31 Aquilae

Travis S. Metcalfe, Jennifer L. van Saders, Thomas R. Ayres +16

Recent observations have shown that sufficiently slow rotation disrupts the organization of large-scale magnetic field in older main-sequence stars, leading to weakened magnetic br…

astro-ph.SR2026

Benchmarking pre-main sequence stellar evolutionary tracks using disk-based dynamical stellar masses

Luigi Zallio, Miguel Vioque, Sean M. Andrews +14

Stellar masses are a fundamental property to understand models of pre-main sequence evolution, but their values derived from Hertzsprung-Russell (HR) diagrams are strongly model de…

astro-ph.SR2026

Long-term Spectroscopic Survey of the Hyades Cluster: The Binary Population

Guillermo Torres, Robert P. Stefanik, David W. Latham

We report the results of a radial velocity monitoring program in the Hyades region, carried out at the Center for Astrophysics over a period of more than 45 yr. Nearly 12,000 spect…

astro-ph.SR2026★ 4 cited

Dynamical masses of YSOs with the VLBA: DYNAMO VLBA: Trigonometric parallaxes and proper motions of YSOs in Orion

Sergio A. Dzib, Jazmín Ordóñez-Toro, Laurent Loinard +9

We present results from a multi-epoch Very Long Baseline Array (VLBA) survey of compact radio sources in the Orion complex, conducted within both the DYNAMO-VLBA and the GOBELINS p…

astro-ph.SR2026

An eclipsing 8.56 minute orbital period mass-transferring binary

Emma T. Chickles, Joheen Chakraborty, Kevin B. Burdge +34

We report the discovery of ATLAS J101342.5-451656.8 (hereafter ATLAS J1013-4516), an 8.56 minute orbital period mass transferring AM Canum Venaticorum binary with mean Gaia magnitu…

astro-ph.SR2026★ 5 cited

Digging into the Interior of Hot Cores with ALMA (DIHCA). VII. Disk candidates around high-mass stars and evidence of anisotropic infall

Fernando A. Olguin, Patricio Sanhueza, Yoko Oya +19

We study the kinematics of condensations in 30 fields forming high-mass stars with ALMA at a high-resolution of ~0.08'' on average (~230 au). The presence of disks is important for…

astro-ph.SR2026

Dissecting the dust distribution and polarization around two B213 young stellar objects with ALMA

Asako Sato, Anaëlle Maury, Josep M. Girart +4

The earliest stages of disk formation and dust evolution during the protostellar phase remain poorly constrained. Millimeter dust emission and its polarization provide key insights…

astro-ph.SR2026★ 1 cited

Magneto-Archeology of White Dwarfs. Revisiting the fossil field scenario with observational constraints during the red giant branch

Lukas Einramhof, Lisa Bugnet, Leila Magdalena Calcaferro +2

The detection of strong, large-scale magnetic fields at the surface of only the oldest population of white dwarfs might point towards a hidden internal magnetic field slowly rising…