Takashi Shimonishi

Survival of Molecular Complexity under Recent Supernova Feedback: Detection of Hot Cores in RX J1713.7−3946

Takashi Shimonishi, Hidetoshi Sano, Kenji Furuya, Yoko Oya

Abstract Protostellar cores located near supernova remnants (SNRs) are considered potential analogs of the birth environment of the solar system. However, the extent to which supernovae influence their chemical evolution remains unclear. We report the first detection of hot molecular cores in …

jp (code pays fourni par la source)

GREX-PLUS Science Book v2

PLUS Science Team, Shunsuke Baba, Sirio Belli, Pietro Benotto et autres

GREX-PLUS (Galaxy Reionization EXplorer and PLanetary Universe Spectrometer) is a mission candidate for a JAXA strategic L-class mission to be launched in the 2030s. Its primary science goals are two-fold: galaxy formation and evolution, and planetary system formation and evolution. The GREX-PLUS …

us, it, jp, gb, de, be, tw, dk (code pays fourni par la source)

Digging into the Chemical Complexity in the Outer Galaxy: A Hot Molecular Core in Sh 2-283

Toki Ikeda, Takashi Shimonishi, Hiroyuki Kaneko, Kenji Furuya et autres

Abstract The outer Galaxy (Galactocentric distance ≳13.5 kpc) serves as an excellent laboratory for investigating the chemical complexity in low-metallicity environments. Here we present the chemical analyses for the outer Galactic hot core Sh 2-283-1a SMM1 ( D GC = 15.7 kpc …

jp, us (code pays fourni par la source)

Magellanic Outflow and Chemistry Survey (MAGOS): Hot Cores in the LMC

Takashi Shimonishi, Kei Tanaka, Yichen Zhang, Kenji Furuya et autres

Abstract The Large Magellanic Cloud (LMC) provides a key laboratory for exploring the diversity of star formation and interstellar chemistry under subsolar metallicity conditions. We present the results of a hot core survey toward 30 massive protostellar objects in the LMC using …

Binding energy distributions of alcohols, thiols, and their precursors on interstellar water ice surfaces

A. Roy, Ankan Das, Milan Sil, Prasanta Gorai et autres

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Binding energy distributions of alcohols, thiols, and their precursors on interstellar water ice surfaces

A. Roy, Ankan Das, Milan Sil, Prasanta Gorai et autres

Binding energy (BE) is a critical parameter in astrochemical modeling, governing the retention of species on interstellar dust grains and their subsequent chemical evolution. However, conventional models often rely on single-valued BEs, overlooking the intrinsic distribution arising from diverse adsorption sites. In …

Simulating the spatial distributions of gas- and ice-phase molecules in galaxies: a new method and preliminary results

Kenji Bekki, Kenji Furuya, Takashi Shimonishi

ABSTRACT Recent observations have revealed significant variations in the abundances of gas- and ice-phase molecules in galaxies with different luminosities and types. In order to discuss the physical origins of these variations, we incorporate gas- and dust-phase interstellar chemistry into galaxy-scale simulations …

au, jp (code pays fourni par la source)

The Detection of Spatially Resolved Protostellar Outflows and Episodic Jets in the Outer Galaxy

Takashi Shimonishi, Natsuko Izumi, Hiroyuki Kaneko, Satoko Takahashi et autres

Abstract We present the first detection of spatially resolved protostellar outflows and jets in the outer Galaxy. We observed five star-forming regions in the outer Galaxy (Sh 2-283 and NOMF05-16/19/23/63; galactocentric distance = 15.7–17.4 kpc) with the Atacama Large Millimeter/submillimeter Array. Toward …

The detection of spatially resolved protosteller outflows and episodic jets in the outer Galaxy

Takashi Shimonishi, Natsuko Izumi, Hiroyuki Kaneko, Satoko Takahashi et autres

We present the first detection of spatially resolved protostellar outflows and jets in the outer Galaxy. We observed five star-forming regions in the outer Galaxy (Sh 2--283, NOMF05-16/19/23/63; galactocentric distance = 15.7--17.4 kpc) with the Atacama Large Millimeter/submillimeter Array (ALMA). Towards Sh …

Cospatial ice mapping of H2O with CO2 and CO across a molecular cloud with JWST/NIRCam

Z. L. Smith, H. J. Dickinson, H. J. Fraser, M. K. McClure et autres

Abstract In the coldest regions of molecular clouds, carbon and oxygen are incorporated into icy dust grains. Despite its outsized role in star and planet formation, sequential formation of ice is poorly constrained. Infrared spectroscopy probes ice chemistry, but previous telescopes observed …

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Searching for missing interstellar oxygen in the far-infrared

Takashi Onaka, Itsuki Sakon, Takashi Shimonishi, Mitsuhiko Honda

The study of interstellar elemental depletion poses an important problem in interstellar matter that at least a quarter of the total oxygen (∼160 ppm relative to hydrogen) is not accounted for in any known form of oxygen in the translucent or dense …

jp (code pays fourni par la source)

ALMA Observations of Peculiar Embedded Icy Objects

Takashi Shimonishi, Takashi Onaka, Itsuki Sakon

Abstract We report the results of molecular line observations with the Atacama Large Millimeter/submillimeter Array (ALMA) toward two peculiar icy objects, which were discovered serendipitously by infrared spectroscopic survey of the Galactic plane with the AKARI satellite. Previous infrared observations have reported …