32 citations · 139 across the 17 of their papers we have counts for
17 papers
The SPHEREx Image and Spectrophotometry Processing Pipeline
Rachel Akeson, Gregory P. Dubois-Felsmann, Brendan P. Crill +41
In this paper, we describe the SPHEREx image and spectrophotometry data processing pipeline, an infrastructure and software system designed to produce calibrated spectral images an…
Extreme Negative Polarisation of New Interstellar Comet 3I/ATLAS
Zuri Gray, Stefano Bagnulo, Galin Borisov +13
We present the first polarimetric observations of the third discovered interstellar object, 3I/ATLAS (C/2025 N1), obtained pre-perihelion with FORS2/VLT, ALFOSC/NOT, and FoReRo2/RC…
The pre-perihelion evolution of the activity of comet C/2017 K2 (PANSTARRS) during the water ice-line crossover
Yuna G. Kwon, Stefano Bagnulo, Johannes Markkanen +4
Comets, relics from the early solar system, consist of dust and ice. The ice sublimates as comets approach the Sun, ejecting dust from their nuclei seen as activity. Different vola…
Imaging Polarimetry of Comet 67P/Churyumov-Gerasimenko: Homogeneous Distribution of Polarisation and its Implications
Zuri Gray, Stefano Bagnulo, Hermann Boehnhardt +8
Comet 67P/Churyumov-Gerasimenko (67P) become observable for the first time in 2021 since the Rosetta rendezvous in 2014--16. Here, we present pre-perihelion polarimetric measuremen…
Optical spectropolarimetry of large C-complex asteroids: polarimetric evidence for heterogeneous surface compositions
Yuna G. Kwon, Stefano Bagnulo, Alberto Cellino
This study presents the first optical spectropolarimetric study of large C-complex asteroids. A total of 64 C-complex asteroids of different subclasses are analyzed using archival…
Coma environment of comet C/2017 K2 around the water ice sublimation boundary observed with VLT/MUSE
Yuna G. Kwon, Cyrielle Opitom, Manuela Lippi
We report a new imaging spectroscopic observation of Oort-cloud comet C/2017 K2 (hereafter K2) on its way to perihelion at 2.53 au, around a heliocentric distance where H2O ice beg…
On the dust of tailless Oort-cloud comet C/2020 T2 (Palomar)
Yuna Grace Kwon, Joseph R. Masiero, Johannes Markkanen
We report our new analysis of Oort-cloud comet C/2020 T2 (Palomar) (T2) observed at 2.06 au from the Sun (phase angle of 28.5 deg) about two weeks before perihelion. T2 lacks a sig…
Probing the surface environment of large T-type asteroids
Yuna G. Kwon, Sunao Hasegawa, Sonia Fornasier +2
We probed the surface environment of large (80 km in diameter) T-type asteroids, a taxonomic type relatively ill-constrained as an independent group, and discussed their place o…
Polarimetric Properties of the Near--Sun Asteroid (155140) 2005 UD in Comparison with Other Asteroids and Meteoritic Samples
Masateru Ishiguro, Yoonsoo P. Bach, Jooyeon Geem +26
The investigation of asteroids near the Sun is important for understanding the final evolutionary stage of primitive solar system objects. A near-Sun asteroid, (155140) 2005 UD, ha…
A polarimetric study of asteroids in comet-like orbits
Jooyeon Geem, Masateru Ishiguro, Yoonsoo P. Bach +16
Context. Asteroids in comet-like orbits (ACOs) consist of asteroids and dormant comets. Due to their similar appearance, it is challenging to distinguish dormant comets from ACOs v…
VLT spectropolarimetry of comet 67P: Dust environment around the end of its intense Southern summer
Yuna Kwon, Stefano Bagnulo, Johannes Markkanen +5
We report our new spectropolarimetric observations for 67P dust over 4,000--9,000 Angstrom using the ESO/Very Large Telescope in January--March 2016 (phase angle ranging 26--…
An Update of the Correlation between Polarimetric and Thermal Properties of Cometary Dust
Yuna G. Kwon, Ludmilla Kolokolova, Jessica Agarwal +1
We present a possible correlation between the properties of scattered and thermal radiation from dust and the principal dust characteristics responsible for this relationship. To t…
Near-Infrared Polarimetric Study of Near-Earth Object 252P/LINEAR: An Implication of Scattered Light from the Evolved Dust Particles
Y. G. Kwon, M. Ishiguro, J. Kwon +7
Aims. We aim to constrain the size and porosity of ejected dust particles from comet 252P/LINEAR and their evolution near the perihelion via near-infrared multiband polarimetry. A…
Optical and Near-Infrared Polarimetry of Non-Periodic Comet C/2013 US10 (Catalina)
Y. G. Kwon, M. Ishiguro, D. Kuroda +12
We present an optical and near-infrared (hereafter NIR) polarimetric study of a comet C/2013 US10 (Catalina) observed on UT 2015 December 17-18 at phase angles of =52.1 deg - 53…
2014-2015 Multiple Outbursts of 15P/Finlay
Masateru Ishiguro, Daisuke Kuroda, Hidekazu Hanayama +21
Multiple outbursts of a Jupiter-family comet, 15P/Finlay, occurred from late 2014 to early 2015. We conducted an observation of the comet after the first outburst and subsequently…
Monitoring Observations of the Jupiter-Family Comet 17P/Holmes during 2014 Perihelion Passage
Yuna Grace Kwon, Masateru Ishiguro, Hidekazu Hanayama +15
We performed a monitoring observation of a Jupiter-Family comet, 17P/Holmes, during its 2014 perihelion passage to investigate its secular change in activity. The comet has drawn t…
Detection of Remnant Dust Cloud Associated with the 2007 Outburst of 17P/Holmes
Masateru Ishiguro, Yuki Sarugaku, Daisuke Kuroda +11
This paper reports a new optical observation of 17P/Holmes one orbital period after the historical outburst event in 2007. We detected not only a common dust tail near the nucleus,…