288 citations · 2.9k across the 59 of their papers we have counts for
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The Automated Reaction-Pathway Search reveals the Energetically Favorable Synthesis of Interstellar CH3OCH3 and HCOOCH3
Yu Komatsu, Kenji Furuya
Recent astronomical observations have shown that interstellar complex organic molecules (COMs) exist even in cold environments (10 K), while various interstellar COMs have co…
Cosmic-ray-driven enhancement of the C/CO abundance ratio in W51C
Mitsuyoshi Yamagishi, Kenji Furuya, Hidetoshi Sano +5
We examine spatial variations of the C/CO abundance ratio () in the vicinity of the -ray supernova remnant W51C, based on [CI] (-), C…
Processing of hydroxylamine, NH2OH, an important prebiotic precursor, on interstellar ices
Gerán Molpeceres, Víctor. M. Rivilla, Kenji Furuya +3
Hydroxylamine, NH2OH, is one of the already detected interstellar molecules with the highest prebiotic potential. Yet, the abundance of this molecule found by astronomical observat…
The Detection of Hot Molecular Cores in the Small Magellanic Cloud
Takashi Shimonishi, Kei E. I. Tanaka, Yichen Zhang +1
We report the first detection of hot molecular cores in the Small Magellanic Cloud, a nearby dwarf galaxy with 0.2 solar metallicity. We observed two high-mass young stellar object…
Reaction dynamics on amorphous solid water surfaces using interatomic machine learned potentials. Microscopic energy partition revealed from the P + H -> PH reaction
Germán Molpeceres, Viktor Zaverkin, Kenji Furuya +2
Energy redistribution after a chemical reaction is one of the few mechanisms to explain the diffusion and desorption of molecules which require more energy than the thermal energy…
The first interferometric measurements of NHD/NH ratio in hot corinos
Yoshihide Yamato, Kenji Furuya, Yuri Aikawa +4
The nitrogen chemical evolution during star and planet formation is still not fully understood. Ammonia (NH) is a key specie in the understanding of the molecular evolution in…
Diffusion activation energy and desorption activation energy for astrochemically relevant species on water ice show no clear relation
Kenji Furuya, Tetsuya Hama, Yasuhiro Oba +3
The activation energy for desorption (Edes) and that for surface diffusion (Esd) of adsorbed molecules on dust grains are two of the most important parameters for the chemistry in…
Quantifying the chemical desorption of HS and PH from amorphous water ice surfaces
Kenji Furuya, Yasuhiro Oba, Takashi Shimonishi
Nonthermal desorption of molecules from icy grain surfaces is required to explain molecular line observations in the cold gas of star-forming regions. Chemical desorption is one of…
The ALMA Survey of 70 m Dark High-mass Clumps in Early Stages (ASHES). V. Deuterated Molecules in the 70 m dark IRDC G14.492-00.139
Takeshi Sakai, Patricio Sanhueza, Kenji Furuya +14
We have observed the 70 m dark infrared dark cloud (IRDC) G14.492-00.139 in the ND =3--2, DCO =3--2, DCN =3--2, and CO =2--1 lines, using the Atac…
The detection of a hot molecular core in the extreme outer Galaxy
Takashi Shimonishi, Natsuko Izumi, Kenji Furuya +1
Interstellar chemistry in low metallicity environments is crucial to understand chemical processes in the past metal-poor universe. Recent studies of interstellar molecules in near…
Molecules with ALMA at Planet-forming Scales (MAPS) IV: Emission Surfaces and Vertical Distribution of Molecules
Charles J. Law, Richard Teague, Ryan A. Loomis +32
The Molecules with ALMA at Planet-forming Scales (MAPS) Large Program provides a unique opportunity to study the vertical distribution of gas, chemistry, and temperature in the pro…
Molecules with ALMA at Planet-forming Scales (MAPS) XII: Inferring the C/O and S/H ratios in Protoplanetary Disks with Sulfur Molecules
Romane Le Gal, Karin I. Öberg, Richard Teague +24
Sulfur-bearing molecules play an important role in prebiotic chemistry and planet habitability. They are also proposed probes of chemical ages, elemental C/O ratio, and grain chemi…
Transmission Electron Microscopy Study of the Morphology of Ices Composed of H2O, CO2, and CO on Refractory Grains
Akira Kouchi, Masashi Tsuge, Tetsuya Hama +15
It has been implicitly assumed that ices on grains in molecular clouds and proto planetary disks are formed by homogeneous layers regardless of their composition or crystallinity.…
Is there any linkage between interstellar aldehyde and alcohol?
Suman Kumar Mondal, Prasanta Gorai, Milan Sil +8
It is speculated that there might be some linkage between interstellar aldehydes and their corresponding alcohols. Here, an observational study and astrochemical modeling are coupl…
Chemical complexity of phosphorous bearing species in various regions of the Interstellar medium
Milan Sil, Satyam Srivastav, Bratati Bhat +10
Phosphorus related species are not known to be as omnipresent in space as hydrogen, carbon, nitrogen, oxygen, and sulfur-bearing species. Astronomers spotted very few P-bearing mol…
Modeling chemistry during star formation: Water deuteration in dynamic star-forming regions
S. S. Jensen, J. K. Jørgensen, K. Furuya +2
Recent observations of the HDO/HO ratio toward protostars in isolated and clustered environments show an apparent dichotomy, where isolated sources show higher D/H ratios than…
Rapid ortho-to-para nuclear spin conversion of H2 on a silicate dust surface
Masashi Tsuge, Toshinobu Namiyoshi, Kenji Furuya +3
The H2 molecule has two nuclear spin isomers, the so-called ortho and para isomers. Nuclear spin conversion (NSC) between these states is forbidden in the gas phase. The energy dif…
Modeling Nitrogen Fractionation in the Protoplanetary Disk around TW Hya: Model Constraints on Grain Population and Carbon-to-Oxygen Elemental Abundance Ratio
Seokho Lee, Hideko Nomura, Kenji Furuya +1
Observations conducted using the Atacama Large Millimeter/submillimeter Array on the protoplanetary disk around TW Hya show the nitrogen fractionation of HCN molecules in HC…
H ortho-para spin conversion on inhomogeneous grain surfaces
Kenji Furuya, Yuri Aikawa, Tetsuya Hama +1
We investigate the evolution of the ortho-to-para ratio of overall (gas + ice) H via the nuclear spin conversion on grain surfaces coated with water ice under physical conditio…
Depletion of 15N in the center of L1544: Early transition from atomic to molecular nitrogen?
Kenji Furuya, Yoshimasa Watanabe, Takeshi Sakai +2
We performed sensitive observations of the N15ND+(1-0) and 15NND+(1-0) lines toward the prestellar core L1544 using the IRAM 30m telescope. The lines are not detected down to 3 sig…
Linking interstellar and cometary O: a deep search for OO in the solar-type protostar IRAS 16293--2422
Vianney Taquet, Ewine F. van Dishoeck, Matthew Swayne +15
Recent measurements carried out at comet 67P/C-G with the probe revealed that molecular oxygen, O, is the fourth most abundant molecule in comets. Models show t…
ALMA Observations of the IRDC Clump G34.43+00.24 MM3: Complex Organic and Deuterated Molecules
Takeshi Sakai, Takahiro Yanagida, Kenji Furuya +6
We have observed complex organic molecules (COMs) and deuterated species toward a hot core/corino (HC) associated with the infrared dark cloud (IRDC) clump G34.43+00.24 MM3 with th…
Depletion of heavy nitrogen in the cold gas of star-forming regions
Kenji Furuya, Yuri Aikawa
We investigate nitrogen isotope fractionation in forming and evolving molecular clouds using gas-ice astrochemical simulations. We find that the bulk gas can become depleted in hea…
Tracing the atomic nitrogen abundance in star-forming regions with ammonia deuteration
Kenji Furuya, Magnus V. Persson
Partitioning of elemental nitrogen in star-forming regions is not well constrained. Most nitrogen is expected to be partitioned among atomic nitrogen, molecular nitrogen (N2), and…