A5030328141- Astrophysics and Star Formation Studies
- Molecular Spectroscopy and Structure
- Atmospheric Ozone and Climate
- Stellar, planetary, and galactic studies
- Advanced Chemical Physics Studies
- Astro and Planetary Science
- Spectroscopy and Laser Applications
- Astronomical Observations and Instrumentation
- Astronomy and Astrophysical Research
- Atomic and Molecular Physics
- Galaxies: Formation, Evolution, Phenomena
- Various Chemistry Research Topics
- Atomic and Subatomic Physics Research
- SAS software applications and methods
- Atmospheric chemistry and aerosols
- Advanced Combustion Engine Technologies
- Astrophysics and Cosmic Phenomena
- Inorganic Fluorides and Related Compounds
- Gamma-ray bursts and supernovae
- Fullerene Chemistry and Applications
- Chemical Reactions and Mechanisms
- Radio Astronomy Observations and Technology
- Catalytic Processes in Materials Science
- Advanced Chemical Sensor Technologies
- Scientific Research and Discoveries
Spanish National Observatory
2021-2024
Yebes Observatory
2021-2024
Instituto de Física Fundamental
2018-2021
National Yang Ming Chiao Tung University
2021
Instituto de Ciencia de Materiales de Madrid
2016-2018
Osservatorio astronomico di Bologna
2010-2018
Istituto di Radioastronomia di Bologna
2014-2016
National Institute for Astrophysics
2015
National Radio Astronomy Observatory
2010-2014
Centro de Astrobiología
2009-2011
We present Atacama Large Millimeter/submillimeter Array (ALMA) observations from the 2014 Long Baseline Campaign in dust continuum and spectral line emission HL Tau region. The images at wavelengths of 2.9, 1.3, 0.87 mm have unprecedented angular resolutions 0 075 (10 AU) to 025 (3.5 AU), revealing an astonishing level detail circumstellar disk surrounding young solar analog Tau, with a pattern bright dark rings observed all wavelengths. By fitting ellipses most distinct rings, we measure...
We report on the discovery of methoxy radical (CH3O) toward cold and dense core B1-b based observation, with IRAM 30 m radio telescope, several lines at 3 2 mm wavelengths. Besides this new molecular species we also detection many arising from methyl mercaptan (CH3SH), formic acid (HCOOH), propynal (HCCCHO), acetaldehyde (CH3CHO), dimethyl ether (CH3OCH3), formate (CH3OCOH), formyl (HCO). The column density all these is ≃1012 cm−2, corresponding to abundances ≃10−11. similarity in for...
We report the detection for first time in space of three new pure hydrocarbon cycles TMC-1:
We report the detection, for first time in space, of a new non-functionalised hydrocarbon cycle direction TMC-1: o -C 6 H 4 (ortho-benzyne). derive column density this (5.0 ± 1.0) × 10 11 cm −2 . The abundance species is around 30 times lower than that cyclopentadiene and indene. compare benzyne with other pure hydrocarbons, cycles or chains, find it could be formed from neutral-radical reactions such as C 2 + CH CHCCH 5 , possibly through 3 CCH Hence, rich content observed TMC-1 arise...
We present the first astronomical detection of a diatomic negative ion, cyanide anion CN-, as well quantum mechanical calculations excitation this through collisions with para-H2. CN- is identified observation J = 2-1 and 3-2 rotational transitions in C-star envelope IRC +10216 IRAM 30-m telescope. The U-shaped line profiles indicate that like large C6H-, formed outer regions envelope. Chemical model suggest species forms from reaction carbon anions N atoms, rather than radiative attachment...
A major goal of the Atacama Large Millimeter/submillimeter Array (ALMA) is to make accurate images with resolutions tens milliarcseconds, which at submillimeter (submm) wavelengths requires baselines up ~15 km. To develop and test this capability, a Long Baseline Campaign (LBC) was carried out from September late November 2014, culminating in end-to-end observations, calibrations, imaging selected Science Verification (SV) targets. This paper presents an overview campaign its main results,...
We present a comprehensive analysis of broadband spectral line survey the Orion Kleinmann–Low nebula (Orion KL), one most chemically rich regions in Galaxy, using HIFI instrument on board Herschel Space Observatory. This spans frequency range from 480 to 1907 GHz at resolution 1.1 MHz. These observations thus encompass largest coverage ever obtained toward this high-mass star-forming region submillimeter with high and include frequencies >1 THz, where Earth's atmosphere prevents ground. In...
We present the first ~7.5'×11.5' velocity-resolved (~0.2 km s-1) map of [C ii] 158 μm line toward Orion molecular cloud 1 (OMC 1) taken with Herschel/HIFI instrument. In combination far-infrared (FIR) photometric images and maps H41α hydrogen recombination CO J=2-1 lines, this data set provides an unprecedented view intricate small-scale kinematics ionized/PDR/molecular gas interfaces radiative feedback from massive stars. The main contribution to luminosity (~85 %) is extended,...
Evidence is mounting that the small bodies of our Solar System, such as comets and asteroids, have at least partially inherited their chemical composition from first phases System formation. It then appears molecular complexity these most likely related to earliest stages star therefore important characterize understand how evolution changes with solar-type protostellar evolution. We present here Large Program "Astrochemical Surveys At IRAM" (ASAI). Its goal carry out unbiased millimeter...
The detection of complex organic molecules (COMs) toward cold sources such as pre-stellar cores (with T<10 K), has challenged our understanding the formation processes COMs in interstellar medium. Recent modelling on COM chemistry at low temperatures provided new insight into these predicting that depends strongly parameters visual extinction and level CO freeze out. We report deep observations two positions L1544 core: dense, highly-extinguished continuum peak with Av>=30 mag within inner...
We present initial results of very high resolution Atacama Large Millimeter/submillimeter Array (ALMA) observations the z = 3.042 gravitationally lensed submillimeter galaxy HATLAS J090311.6+003906 (SDP.81). These were carried out using a extended configuration as part Science Verification for 2014 ALMA Long Baseline Campaign, with baselines up to ∼15 km. continuum imaging at 151, 236, and 290 GHz unprecedented angular resolutions fine 23 mas, corresponding an unmagnified spatial scale ∼180...
An exhaustive chemical characterization of dense cores is mandatory to our understanding composition changes from a starless protostellar stage. However, only few sources have had their molecular characterized in detail. Here we present
GEMS is an IRAM 30m Large Program whose aim determining the elemental depletions and ionization fraction in a set of prototypical star-forming regions. This paper presents first results from dark cloud TMC 1. Extensive millimeter observations have been carried out with telescope (3 mm 2 mm) 40m Yebes (1.3 cm 7 to determine fractional abundances CO, HCO
We report the detection of sulfur-bearing species NCS, HCCS, H
We present the first identification in interstellar space of propargyl radical (CH
We report the detection of two isomers ethynyl cyclopentadiene ( c -C 5 H CCH), namely 1- and 2-ethynyl-1,3-cyclopentadiene, in direction TMC-1. derive column densities (1.4 ± 0.2) × 10 12 cm −2 (2.0 0.4) , respectively, for these derivatives, which imply that they are about ten times less abundant than cyclopentadiene. also tentative benzene (C 6 we estimate a density (2.5 . derived abundances corresponding cyano derivatives found values significantly lower previously reported. The...
We report the detection in TMC-1 of protonated form C3S. The discovery cation HC3S+ was carried through observation four harmonically related lines Q band using Yebes 40m radiotelescope, and is supported by accurate ab initio calculations laboratory measurements its rotational spectrum. derive a column density N(HC3S+) = (2.0 +/- 0.5)e11 cm-2, which translates to an abundance ratio C3S/HC3S+ 65 20. This comparable CS/HCS+ (35 8) factor about ten larger than C3O/HC3O+ previously found same...
We report the detection of fulvenallene ($c$-C$_5$H$_4$CCH$_2$) in direction TMC-1 with QUIJOTE line survey. Thirty rotational transitions $K_a$=0,1,2,3 and $J$=9-15 were detected. The best temperature fitting data is 9\,K a derived column density (2.7$\pm$0.3)$\times$10$^{12}$ cm$^{-2}$, which only factor 4.4 below that its potential precursor cyclopentadiene ($c$-C$_5$H$_6$), 1.4--1.9 times higher than ethynyl derivatives cyclopentadiene. searched for fulvene ($c$-C$_5$H$_4$CH$_2$), CH$_2$...
We report on the discovery of C 7 N − anion towards starless core TMC-1 and carbon-rich evolved star IRC +10216. used data QUIJOTE ( Q -band Ultrasensitive Inspection Journey to Obscure Environment) line survey found six lines in perfect harmonic frequency relation from J = 27 26 up 32 31. The can be reproduced with a rotational constant distortion B 582.68490 ± 0.00024 MHz D 4.01 0.13 Hz, respectively. standard deviation fit is 4 kHz. Towards +10216, we identify 17 43 42; their frequencies...
We found four series of harmonically related lines in IRC +10216 with the Yebes 40 m and IRAM 30 telescopes. The first corresponds to a molecule rotational constant, B , 1448.5994±0.0013 MHz distortion D 63.45±1.15 Hz covers upper quantum numbers from J u = 11 up 33 (B1449). second is fitted 1446.9380±0.0098 91±23 17 (B1447). third 598.7495±0.0011 6.13±0.43 26 41 (B599). Finally, frequencies last can be reproduced 594.3176±0.0026 4.92±1.16 (B594). large values point toward metal-bearing...
We present the first detection of HCNS (thiofulminic acid) in space with QUIJOTE line survey direction TMC-1. performed a complete study isomers CHNS and CHNO, including NCO NCS. The derived column densities for HCNS, HNCS, HSCN are (9.0+/-0.5)e9, (3.2+/-0.1)e11, (8.3+/-0.4)e11 cm-2, respectively. HNCS/HSCN abundance ratio is 0.38. ratios HNCO/HNCS, HCNO/HCNS, HOCN/HSCN, NCO/NCS 34+/-4, 8.3+/-0.7, 0.18+/-0.03, 0.78+/-0.07, These cannot be correctly reproduced by our gas-phase chemical...
We report on the first detection in space of fulminic acid, HCNO. This isomer HNCO has been observed three starless cores, B1, L1544, and L183, low-mass star-forming region L1527 with a measured abundance ratio HNCO/HCNO between 40 70. However, HCNO was not detected toward direction cyanopolyyne peak TMC-1 or Orion Hot Core region. The derived these cases is greater than 350 1000 Orion, respectively. find that CH2 + NO → H key reaction for formation acid. A value 5.5 × 10−12 cm3 s−1...
We report the discovery of propylene (also called propene, CH2CHCH 3) with IRAM 30 m radio telescope toward dark cloud TMC-1. Propylene is most saturated hydrocarbon ever detected in space through astronomical techniques. In spite its weak dipole moment, six doublets (A and E species) plus another line from A species have been observed main-beam temperatures above 20 mK. The derived total column density 4 × 1013 cm-2, which corresponds to an abundance relative H2 10-9, i.e., comparable that...
Cyanogen (NCCN) is the simplest member of series dicyanopolyynes. It has been hypothesized that this family molecules can be important constituents interstellar and circumstellar media, although lack a permanent electric dipole moment prevents its detection through radioastronomical techniques. Here we present first solid evidence presence cyanogen in clouds protonated form toward cold dark TMC-1 L483. Protonated (NCCNH+) identified J=5-4 J=10-9 rotational transitions using 40m...