288 citations · 5.1k across the 106 of their papers we have counts for
20 papers · 1 filter
Isotopomer-Specific Carbon Isotope Ratio of Complex Organic Molecules in Star-Forming Cores
Ryota Ichimura, Hideko Nomura, Kenji Furuya +2
The recent observation of complex organic molecules (COMs) in interstellar ices by the James Webb Space Telescope (JWST), along with previous gas-phase detections, underscores the…
Formation of unsaturated carbon chains through carbon chemisorption on solid CO
Masashi Tsuge, Germán Molpeceres, Ryota Ichimura +3
The interaction of carbon atoms with solid carbon monoxide (CO) is a fundamental process in astrochemistry, influencing the formation of complex organic molecules in interstellar e…
Q-band Line Survey Observations toward a Carbon-chain-rich Clump in the Serpens South Region
Kotomi Taniguchi, Fumitaka Nakamura, Sheng-Yuan Liu +17
We have conducted Q-band (30 GHz 50 GHz) line survey observations toward a carbon-chain emission peak in the Serpens South cluster-forming region with the extended Q-band (eQ)…
Molecular Formation in Low-Metallicity Hot Cores
Yara Sobhy, Hideko Nomura, Tetsuo Yamamoto +1
The chemical complexity in low-metallicity hot cores has been confirmed by observations. We investigate the effect of varying physical parameters, such as temperature, density and…
Multiple chemical tracers finally unveil the intricate NGC\,1333 IRAS\,4A outflow system. FAUST XVI
Layal Chahine, Cecilia Ceccarelli, Marta De Simone +54
The exploration of outflows in protobinary systems presents a challenging yet crucial endeavour, offering valuable insights into the dynamic interplay between protostars and their…
Carbon isotope chemistry in protoplanetary disks: Effects of C/O ratios
Seokho Lee, Hideko Nomura, Kenji Furuya
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]> 1). We investigate…
Hot methanol in the [BHB2007] 11 protobinary system: hot corino versus shock origin? : FAUST V
C. Vastel, F. Alves, C. Ceccarelli +63
Methanol is a ubiquitous species commonly found in the molecular interstellar medium. It is also a crucial seed species for the building-up of the chemical complexity in star formi…
FAUST III. Misaligned rotations of the envelope, outflow, and disks in the multiple protostellar system of VLA 16232417
Satoshi Ohashi, Claudio Codella, Nami Sakai +69
We report a study of the low-mass Class-0 multiple system VLA 1623AB in the Ophiuchus star-forming region, using HCO (), CS (), and CCH () lines as…
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…
X-ray induced chemistry of water and related molecules in low-mass protostellar envelopes
Shota Notsu, Ewine F. van Dishoeck, Catherine Walsh +2
Recent water line observations toward several low-mass protostars suggest low water gas fractional abundances in the inner warm envelopes. Water destruction by X-rays has been prop…
ALMA view of the Ophiuchi A PDR with a 360-au beam: the [CI] emission originates from the plane-parallel PDR and extended gas
Mitsuyoshi Yamagishi, Yoshito Shimajiri, Kazuki Tokuda +5
We present the results of data analysis of the [CI] (-) emission from the Ophiuchi A photon-dominated region (PDR) obtained in the ALMA ACA stand-alone mo…
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…
ALMA observations of layered structures due to CO selective dissociation in the Ophiuchi A plane-parallel PDR
M. Yamagishi, C. Hara, R. Kawabe +7
We analyze CO(=2-1), CO(=2-1), CO (=2-1), and 1.3 mm continuum maps of the Ophiuchi A photo-dissociation region (PDR) obtained with ALMA. Layered…
ALMA Observations of the Submillimeter Dense Molecular Gas Tracers in the Luminous Type-1 Active Nucleus of NGC 7469
Takuma Izumi, Kotaro Kohno, Susanne Aalto +30
We present ALMA Cycle 1 observations of the central kpc region of the luminous type-1 Seyfert galaxy NGC 7469 with unprecedented high resolution (0.5 0.4 = 165 pc $\…
Physical and chemical structure of planet-forming disks probed by millimeter observations and modeling
Anne Dutrey, Dmitry Semenov, Edwige Chapillon +10
Protoplanetary disks composed of dust and gas are ubiquitous around young stars and are commonly recognized as nurseries of planetary systems. Their lifetime, appearance, and struc…
Water in Protoplanetary Disks: Deuteration and Turbulent Mixing
Kenji Furuya, Yuri Aikawa, Hideko Nomura +2
We investigate water and deuterated water chemistry in turbulent protoplanetary disks. Chemical rate equations are solved with the diffusion term, mimicking turbulent mixing in ver…
Chemical Processes in Protoplanetary Disks II. On the importance of photochemistry and X-ray ionization
Catherine Walsh, Hideko Nomura, T. J. Millar +1
We investigate the impact of photochemistry and X-ray ionization on the molecular composition of, and ionization fraction in, a protoplanetary disk surrounding a typical T Tauri st…
Chemical Processes in Protoplanetary Disks
Catherine Walsh, T. J. Millar, Hideko Nomura
We have developed a high resolution combined physical and chemical model of a protoplanetary disk surrounding a typical T Tauri star. Our aims were to use our model to calculate th…
The Solar Nebula on Fire: A Solution to the Carbon Deficit in the Inner Solar System
Jeong-Eun Lee, Edwin A. Bergin, Hideko Nomura
Despite a surface dominated by carbon-based life, the bulk composition of the Earth is dramatically carbon poor when compared to the material available at formation. Bulk carbon de…