Interstellar detection of the simplest aminocarbyne H<sub>2</sub>NC: an ignored but abundant molecule
نویسندگان
چکیده
We report the first identification in space of H2NC, a high-energy isomer H2CN that has been largely ignored chemical and astrochemical studies. The observation various unidentified lines around 72.2 GHz cold dark cloud L483 motivated search for, successful detection of, additional groups harmonic relation. After an exhaustive high-level ab initio screening possible carriers, we confidently assign to H2NC based on good agreement between astronomical theoretical spectroscopic parameters sound arguments. observed frequencies are used precisely characterize rotational spectrum H2NC. This species is also detected B1-b z=0.89 galaxy front quasar PKS1830-211. derive H2NC/H2CN abundance ratios 1 0.27 toward Neither nor TMC-1, which seriously questions previous this source. suggest ratio behaves as HNC/HCN ratio, with values close one dense clouds below diffuse clouds. reactions N + CH3 C NH3 emerge strong candidates produce interstellar Further studies these two needed evaluate yield Due small number atoms involved, it should be feasible constrain chemistry behind H2CN, just done for HNC HCN, could allow use probe or physical conditions host
منابع مشابه
Discovery of interstellar ketenyl (HCCO), a surprisingly abundant radical.
We have conducted radioastronomical observations of 9 dark clouds with the IRAM 30m telescope. We present the first identification in space of the ketenyl radical (HCCO) toward the starless core Lupus-1A and the molecular cloud L483, and the detection of the related molecules ketene (H2CCO) and acetaldehyde (CH3CHO) in these two sources and 3 additional dark clouds. We also report the detection...
متن کاملan investigation about the relationship between insurance lines and economic growth; the case study of iran
مطالعات قبلی بازار بیمه را به صورت کلی در نظر می گرفتند اما در این مطالعه صنعت بیمه به عنوان متغیر مستفل به بیمه های زندگی و غیر زندگی شکسته شده و هم چنین بیمه های زندگی به رشته های مختلف بیمه ای که در بازار بیمه ایران سهم قابل توجهی دارند تقسیم میشود. با استفاده از روشهای اقتصاد سنجی داده های برای دوره های 48-89 از مراکز ملی داده جمع آوری شد سپس با تخمین مدل خود بازگشتی برداری همراه با تعدادی ...
15 صفحه اولDetection of Acetamide (ch3conh2): the Largest Interstellar Molecule with a Peptide Bond
Acetamide (CH3CONH2) has been detected in emission and absorption toward the star-forming region Sagittarius B2(N) with the 100 m Green Bank Telescope (GBT) by means of four A-species and four E-species rotational transitions. All transitions have energy levels less than 10 K. The Sgr B2(N) cloud is known to have a cold halo with clumps of gas at several different velocities. Absorption feature...
متن کاملDetection of a branched alkyl molecule in the interstellar medium: iso-propyl cyanide.
The largest noncyclic molecules detected in the interstellar medium (ISM) are organic with a straight-chain carbon backbone. We report an interstellar detection of a branched alkyl molecule, iso-propyl cyanide (i-C3H7CN), with an abundance 0.4 times that of its straight-chain structural isomer. This detection suggests that branched carbon-chain molecules may be generally abundant in the ISM. Ou...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Astronomy and Astrophysics
سال: 2021
ISSN: ['0004-6361', '1432-0746']
DOI: https://doi.org/10.1051/0004-6361/202141491