Zobrazeno 1 - 10
of 212
pro vyhledávání: '"Kenji FURUYA"'
Autor:
Rana Ghosh, Ankan Das, Prasanta Gorai, Suman Kumar Mondal, Kenji Furuya, Kei E. I. Tanaka, Takashi Shimonishi
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
SO and SO2 are two potential candidates to trace the different evolutionary phases of the low-mass star-formation process. Here, we report observations of SO and SO2 along with their isotopologues, 34SO and 34SO2, respectively, in four distinct phase
Externí odkaz:
https://doaj.org/article/296083f36dbb4722b20a195169d099ca
Autor:
Tomohiro C. Yoshida, Hideko Nomura, Charles J. Law, Richard Teague, Yuhito Shibaike, Kenji Furuya, Takashi Tsukagoshi
Publikováno v:
The Astrophysical Journal Letters, Vol 971, Iss 1, p L15 (2024)
Gas giant planets are formed by gas accretion onto planetary cores in protoplanetary disks. However, direct evidence of this process is still lacking, limiting our understanding of planetary formation processes. During mass accretion, planet-driven o
Externí odkaz:
https://doaj.org/article/ffda36524f42432a853cadabf2b7daac
Autor:
Kenji Furuya, Takashi Shimonishi
Publikováno v:
The Astrophysical Journal Letters, Vol 968, Iss 2, p L19 (2024)
Understanding in which chemical forms phosphorus exists in star- and planet-forming regions and how phosphorus is delivered to planets are of great interest from the viewpoint of the origin of life on Earth. Phosphine (PH _3 ) is thought to be a key
Externí odkaz:
https://doaj.org/article/061ea4eb656d40ac9880dd7b548945b7
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 2, p 250 (2024)
Sulfur dioxide (SO _2 ) is a sulfur-containing molecule expected to exist as a solid in the interstellar medium. In this study, we have performed laboratory experiments and computational studies on the surface reactions of solid SO _2 with hydrogen a
Externí odkaz:
https://doaj.org/article/5599432f3af745d89316b647b19235da
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 25 (2024)
X-rays have significant impacts on cold, weakly ionized protoplanetary disks by increasing the ionization rate and driving chemical reactions. Stellar flares are explosions that emit intense X-rays and are the unique source of hard X-rays with an ene
Externí odkaz:
https://doaj.org/article/5b9c72b054ae45e3b885d146c98c3386
Autor:
Kenji Furuya
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 115 (2024)
One of the most serious limitations of current astrochemical models with the rate equation (RE) approach is that only a single type of binding site is considered in grain surface chemistry, although laboratory and quantum chemical studies have found
Externí odkaz:
https://doaj.org/article/7bc2d856467d4f579c62b81fecfdd916
Autor:
Yoshihide Yamato, Yuri Aikawa, Viviana V. Guzmán, Kenji Furuya, Shota Notsu, Gianni Cataldi, Karin I. Öberg, Chunhua Qi, Charles J. Law, Jane Huang, Richard Teague, Romane Le Gal
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 83 (2024)
Characterizing the chemistry of complex organic molecules (COMs) at the epoch of planet formation provides insights into the chemical evolution of the interstellar medium (ISM) and the origin of organic materials in our solar system. We report a dete
Externí odkaz:
https://doaj.org/article/206d4c59b2254ab598434a1f8b6eb310
Autor:
Kenji Furuya, Takashi Tsukagoshi, Chunhua Qi, Hideko Nomura, L. Ilsedore Cleeves, Seokho Lee, Tomohiro C. Yoshida
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 1, p 73 (2024)
Externí odkaz:
https://doaj.org/article/b08de6e035de4b259f66fb9901429f6d
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 55 (2024)
Recent high-resolution and sensitivity Atacama Large Millimeter/submillimeter Array observations have unveiled the carbon isotope ratios ( ^12 C/ ^13 C) of complex organic molecules (COMs) in a low-mass protostellar source. To understand the ^12 C/ ^
Externí odkaz:
https://doaj.org/article/9e62a2e2db684bad95ad1704417e41f6
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 1, p 41 (2024)
Carbon isotope fractionation of CO has been reported in the disk around TW Hya, where elemental carbon is more abundant than elemental oxygen ([C/O] _elem > 1). We investigated the effects of the [C/O] _elem ratio on carbon fractionation using astroc
Externí odkaz:
https://doaj.org/article/56dedad729994272bbedde1dbb88177b