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During the process of star formation, the dense gas undergoes significant chemical evolution leading to the emergence of a rich variety of molecules associated with hot cores and hot corinos. However, the physical and chemical conditions…

Astrophysics of Galaxies · Physics 2024-06-19 Laure Bouscasse , Timea Csengeri , Friedrich Wyrowski , K. M. Menten , S. Bontemps

Complex Organic Molecules (COMs) have been found toward low-mass protostars but the origins of the COM emission are still unclear. It can be associated with, for example, hot corinos, outflows, and/or accretion shock/disk atmosphere. We…

Recent astrochemical models and experiments have explained that complex organic molecules (COMs; molecules composed of six or more atoms) are produced on the dust grain mantles in cold and dense gas in prestellar cores. However, the…

Astrophysics of Galaxies · Physics 2022-11-16 Giseon Baek , Jeong-Eun Lee , Tomoya Hirota , Kee-Tae Kim , Mi Kyoung Kim

The high abundances of Complex Organic Molecules (COMs) with respect to methanol, the most abundant COM, detected towards low-mass protostars, tend to be underpredicted by astrochemical models. This discrepancy might come from the large…

Solar and Stellar Astrophysics · Physics 2015-05-20 Vianney Taquet , Ana López-Sepulcre , Cecilia Ceccarelli , Roberto Neri , Claudine Kahane , Steven B. Charnley

During star formation, the dense gas undergoes significant chemical evolution leading to the emergence of a rich variety of molecules associated with hot cores and hot corinos. The physical and chemical conditions are poorly constrained;…

Astrophysics of Galaxies · Physics 2022-06-08 L. Bouscasse , T. Csengeri , A. Belloche , F. Wyrowski , S. Bontemps , R. Güsten , K. M. Menten

Complex organic molecules (COMs) have been observed to be abundant in the gas phase toward protostars. Deep line surveys have been carried out only for a limited number of well-known high-mass star forming regions using the Atacama Large…

Complex organic molecules (COMs) have been detected in a variety of environments, including cold prestellar cores. Given the low temperature of these objects, these last detections challenge existing models. We report here new observations…

Solar and Stellar Astrophysics · Physics 2015-06-23 Charlotte Vastel , Cecilia Ceccarelli , Bertrand Lefloch , Raphael Bachiller

G31.41+0.31 is a well known chemically rich hot molecular core (HMC). Using Band 3 observations of Atacama Large Millimeter Array (ALMA), we have analyzed the chemical and physical properties of the source. We have identified methyl…

Complex organic molecules (COMs) are thought to form on icy dust grains in the earliest phase of star formation. The evolution of these COMs from the youngest Class 0/I protostellar phases toward the more evolved Class II phase is still not…

Interstellar complex organic molecules (COMs) in solar-like young stellar objects (YSOs), particularly within protostellar disks, are of significant interest due to their potential connection to prebiotic chemistry in emerging planetary…

The detection of complex organic molecules (COMs) toward dense, collapsing prestellar cores has sparked interest in the fields of astrochemistry and astrobiology, yet the mechanisms for COM formation are still debated. It was originally…

Astrophysics of Galaxies · Physics 2023-04-05 Samantha Scibelli , Yancy Shirley

The presence of complex organic molecules (COMs) in the interstellar medium (ISM) is of great interest since it may link to the origin and prevalence of life in the universe. Aiming to investigate the occurrence of COMs and their possible…

We report the first extragalactic detection of the complex organic molecules (COMs) dimethyl ether (CH$_3$OCH$_3$) and methyl formate (CH$_3$OCHO) with the Atacama Large Millimeter/submillimeter Array (ALMA). These COMs together with their…

We report on a systematic search for oxygen-bearing Complex Organic Molecules (COMs) in the Solar-like protostellar shock region L1157-B1, as part of the IRAM Large Program "Astrochemical Surveys At IRAM" (ASAI). Several COMs are…

Astrophysics of Galaxies · Physics 2017-05-31 B. Lefloch , C. Ceccarelli , C. Codella , C. Favre , L. Podio , C. Vastel , S. Viti , R. Bachiller

Complex organic molecules (COMs) in protoplanetary disks are key to understanding the origin of volatiles in comets in our solar system, yet the chemistry of COMs in protoplanetary disks remains poorly understood. Here we present Atacama…

Earth and Planetary Astrophysics · Physics 2023-12-05 Yoshihide Yamato , Shota Notsu , Yuri Aikawa , Yuki Okoda , Hideko Nomura , Nami Sakai

The destiny of complex organic molecules (COMs) in star-forming regions is interlinked with various evolutionary phases. Therefore, identifying these species in diversified environments of identical star-forming regions would help to…

We report the detection of four new hot corino sources, G211.47-19.27S, G208.68-19.20N1, G210.49-19.79W and G192.12-11.10 from a survey study of Planck Galactic Cold Clumps in the Orion Molecular Cloud Complex with the Atacama Compact Array…

We present the spectra of Complex Organic Molecules (COMs) detected in HOPS 373SW with the Atacama Large Millimeter/submillimeter Array (ALMA). HOPS 373SW, which is a component of a protostellar binary with a separation of 1500 au, has been…

Solar and Stellar Astrophysics · Physics 2023-06-30 Jeong-Eun Lee , Giseon Baek , Seokho Lee , Jae-Hong Jeong , Chul-Hwan Kim , Yuri Aikawa , Gregory J. Herczeg , Doug Johnstone , John J. Tobin

Complex organic molecules (COMs) have been detected in a few Class 0 protostars but their origin is not well understood. Going beyond studies of individual objects, we want to investigate the origin of COMs in young protostars on a…

The physical and chemical conditions in Class 0/I protostars are fundamental in unlocking the protostellar accretion process and its impact on planet formation. The aim is to determine which physical components are traced by different…

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