Tootfinder

Worlds Next Door: A Candidate Giant Planet Imaged in the Habitable Zone of $\alpha$ Cen A. II. Binary Star Modeling, Planet and Exozodi Search, and Sensitivity Analysis
Aniket Sanghi, Charles Beichman, Dimitri Mawet, William O. Balmer, Nicolas Godoy, Laurent Pueyo, Anthony Boccaletti, Max Sommer, Alexis Bidot, Elodie Choquet, Pierre Kervella, Pierre-Olivier Lagage, Jarron Leisenring, Jorge Llop-Sayson, Michael Ressler, Kevin Wagner, Mark Wyatt

Worlds Next Door: A Candidate Giant Planet Imaged in the Habitable Zone of $α$ Cen A. II. Binary Star Modeling, Planet and Exozodi Search, and Sensitivity Analysis
JWST observed our closest solar twin, $α$ Cen A, with the MIRI coronagraph in F1550C (15.5 $μ$m) at three distinct epochs between August 2024 and April 2025. For the first time with JWST, we demonstrate the application of reference star differential imaging to simultaneously subtract the coronagraphic image of a primary star and the point spread function (PSF) of its binary companion to conduct a deep search for exoplanets and dust emission. We achieve a typical 5$σ$ point source contrast se…

Nearly Full-Sky Low-Multipole CMB Temperature Anisotropy: II. Angular Power Spectra and Likelihood
Hayley C. Nofi, Graeme E. Addison, Charles L. Bennett, Laura Herold, J. L. Weiland
https://arxiv.org/abs/2509.03719

Nearly Full-Sky Low-Multipole CMB Temperature Anisotropy: II. Angular Power Spectra and Likelihood
We present a CMB temperature power spectrum measurement at large angular scales from WMAP and Planck maps that were cleaned of foregrounds using a template-based approach described in a companion paper. We recover essentially the full-sky CMB information at multipoles $\ell<30$ with only 1% of pixels near the Galactic plane masked and no inpainting. Notable features continue to appear: (a) a low quadrupole power compared to the best-fit Planck 2018 $Λ$CDM spectrum at $2.2σ$, (b) a dip in the …

The Type II SN 2025pht in NGC 1637: A Red Supergiant with Carbon-rich Circumstellar Dust as the First JWST Detection of a Supernova Progenitor Star
Charles D. Kilpatrick, Aswin Suresh, Kyle W. Davis, Maria R. Drout, Ryan J. Foley, Alexander Gagliano, Wynn V. Jacobson-Galan, Ravjit Kaur, Kirsty Taggart, Jason Vazquez
https://arxiv.org/abs/2…

The Type II SN 2025pht in NGC 1637: A Red Supergiant with Carbon-rich Circumstellar Dust as the First JWST Detection of a Supernova Progenitor Star
We present follow-up imaging and spectroscopy and pre-explosion imaging of supernova (SN) 2025pht located in NGC 1637 at 12 Mpc. Our spectroscopy shows that SN 2025pht is a Type II SN with broad lines of hydrogen and with minimal line-of-sight extinction inferred from Na I D absorption. NGC 1637 was the target of several epochs of Hubble Space Telescope (HST) and James Webb Space Telescope (JWST) imaging covering the site of SN 2025pht from 31 to 0.7 yr prior to discovery. Using a follow-up HST…

🇺🇦 #NowPlaying on BBCRadio3's #Breakfast
Charles Gounod, Kazuki Yamada & Monte-Carlo Philharmonic Orchestra:
🎵 Symphony No. 1 in D Major, CG 527: II. Allegro moderato
#CharlesGounod #KazukiYamada
https://open.spotify.com/track/793qwXqGDOr5z7Uy2nkPgQ

🇺🇦 #NowPlaying on #BBC6Music's #JamzSupernova
Etienne Charles, Quiana Parler & Quentin E. Baxter:
🎵 Watch Night II (Ring Shout)
#EtienneCharles #QuianaParler #QuentinEBaxter
https://etiennecharles.bandcamp.com/track/watch-night-ii-ring-shout-feat-quiana-parler-quentin-e-baxter