activity
19992026
most citedSpectra and Light Curves of Six Type Ia Supernovae at 0.511 < z < 1.12 and the Union2 Compilation

1.4k citations · 15k across the 106 of their papers we have counts for

collaborators

109 papers

astro-ph.EP2026

Opposition effect of comet 28P/Neujmin observed with Subaru Hyper Suprime-Cam

Takafumi Ootsubo, Hideyo Kawakita, Tadafumi Takata +8

We present an observational study of the nucleus of comet 28P/Neujmin at a heliocentric distance exceeding 10 au, where coma contamination is effectively minimized. Observations we…

astro-ph.IM2026

Gender equality activities in Astronomical Society of Japan

Aya Bamba, Ayumi Asai, Ryohko Ishikawa +6

The female ratio in science field, including astronomy, is still quite low in Japan. We, the Astronomical Society of Japan, are making efforts to equalise the gender balance. In th…

astro-ph.GA2025

A Possible Shutting-Down Event of Mass Accretion in An Active Galactic Nucleus at z~1.8

Tomoki Morokuma, Malte Schramm, Toshihiro Kawaguchi +11

We present the discovery of a large gradual apparent fading event in optical and near-infrared wavelengths in a quasar at z=1.767 by a factor of 20-30 (in optical) over a period of…

astro-ph.HE2025

A Common Origin of Normal Type Ia Supernovae Suggested by the Photometric Diversity

Weiyu Wu, Ji-an Jiang, Dezheng Meng +16

In recent years, with an increasing number of type Ia supernovae (SNe Ia) discovered soon after their explosions, a non-negligible fraction of SNe Ia with early-excess emissions (E…

astro-ph.GA2025★ 2 cited

UNIONS: The Ultraviolet Near-Infrared Optical Northern Survey

Stephen Gwyn, Alan W. McConnachie, Jean-Charles Cuillandre +86

The Ultraviolet Near-Infrared Optical Northern Survey (UNIONS) is a "collaboration of collaborations" that is using the Canada-France-Hawai'i Telescope, the Pan-STARRS telescopes,…

astro-ph.EP2024

The New Horizons Extended Mission Target: Arrokoth Search and Discovery

Marc W. Buie, John R. Spencer, Simon B. Porter +37

Following the Pluto fly-by of the New Horizons spacecraft, the mission provided a unique opportunity to explore the Kuiper Belt in-situ. The possibility existed to fly-by a Kuiper…