A5019275966- Astrophysics and Star Formation Studies
- Molecular Spectroscopy and Structure
- Stellar, planetary, and galactic studies
- Atmospheric Ozone and Climate
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Advanced Chemical Physics Studies
- Astronomical Observations and Instrumentation
- Spectroscopy and Laser Applications
- Atomic and Molecular Physics
- Chemical Reactions and Mechanisms
- Boron Compounds in Chemistry
- Origins and Evolution of Life
- Space Exploration and Technology
- Atmospheric chemistry and aerosols
- Energetic Materials and Combustion
- Nuclear physics research studies
- Calibration and Measurement Techniques
- Astronomical and nuclear sciences
- Gamma-ray bursts and supernovae
Centro de Astrobiología
2022-2024
Universidad Complutense de Madrid
2020-2022
Research Center on Earth Sciences
2021-2022
Abstract We present the first detection of ( Z )-1,2-ethenediol, (CHOH) 2 , enol form glycolaldehyde, in interstellar medium toward G+0.693−0.027 molecular cloud located Galactic Center. have derived a column density (1.8 ± 0.1) × 10 13 cm −2 which translates into abundance with respect to hydrogen 1.3 −10 . The ratio between glycolaldehyde and )-1,2-ethenediol is ∼5.2. discuss several viable formation routes through chemical reactions from precursors such as HCO, H CO, CHOH, or CH CHOH....
Abstract Following the discovery of dimethyl sulfide (DMS; CH 3 SCH ) signatures in comet 67P/Churyumov–Gerasimenko, we report first detection this organosulfur species interstellar medium during exploration an ultradeep molecular line survey performed toward Galactic center cloud G+0.693-0.027 with Yebes 40 m and IRAM 30 telescopes. We derive a column density N = (2.6 ± 0.3) × 10 13 cm −2 , yielding fractional abundance relative to H 2 ∼1.9 −10 . This implies that DMS is factor ∼1.6 times...
We determined effective temperatures, surface gravities, and metallicities for a sample of 343 M dwarfs observed with CARMENES, the double-channel, high-resolution spectrograph installed at 3.5 m telescope Calar Alto Observatory. employed S TE P AR YN , Bayesian spectral synthesis implementation particularly designed to infer stellar atmospheric parameters late-type stars following Markov chain Monte Carlo approach. made use BT-Settl model atmospheres radiative transfer code turbospectrum...
We report the first detection of phosphorus monoxide ion (PO + ) in interstellar medium. Our unbiased and very sensitive spectral survey toward G+0.693–0.027 molecular cloud covers four different rotational transitions this molecule, two which ( J = 1–0 2–1) appear free contamination from other species. The fit performed, assuming local thermodynamic equilibrium conditions, yields a column density N =(6.0 ± 0.7) × 10 11 cm −2 . resulting abundance with respect to hydrogen is 4.5 –12 PO...
Abstract We report the first detection in interstellar medium (ISM) of a C 2 H 5 O N isomer: syn -glycolamide (NH C(O)CH OH). The exquisite sensitivity at sub-mK levels an ultradeep spectral survey carried out with Yebes 40 m and IRAM 30 telescopes toward G+0.693–0.027 molecular cloud has allowed us to unambiguously identify multiple transitions this species. derived column density (7.4 ± 0.7) × 10 12 cm −2 , which implies abundance respect 5.5 −11 . other isomers, including higher-energy...
Abstract We report the first detection in interstellar medium of N -cyanomethanimine (H 2 CNCN), stable dimer HCN highest energy and most complex organic molecule identified space containing prebiotically relevant NCN backbone. have a plethora -type rotational transitions with 3 ≤ J up 11 K that belong to this species toward Galactic center G+0.693-0.027 molecular cloud, only source showing three cyanomethanimine isomers (including Z - E -isomers C -cyanomethanimine, HNCHCN). derived total...
Abstract We present the first detection in space of O-protonated carbonyl sulfide (HOCS + ), midst an ultradeep molecular line survey toward G+0.693-0.027 cloud. From observation all K a = 0 transitions ranging from J lo 2 to 13 HOCS covered by our survey, we derive column density N (9 ± 2) × 10 12 cm −2 , translating into fractional abundance relative H ∼7 −11 . Conversely, S-protonated HSCO isomer remains undetected, and upper limit its with respect ≤3 factor ≥2.3 less abundant than obtain...
We present the first detection in space of thionylimide (HNSO) toward Galactic Center molecular cloud G+0.693-0.027, thanks to superb sensitivity an ultradeep line survey carried out with Yebes 40$\,$m and IRAM 30$\,$m telescopes. This molecule is species detected interstellar medium containing, simultaneously, N, S O. have identified numerous $K$$_a$ = 0, 1 2 transitions belonging HNSO covering from $J$$_{\rm up}$ 10, including several completely unblended features. derive a column density...
Abstract A quarter century after the detection of last interstellar carboxylic acid, acetic acid (CH 3 COOH), we report discovery a new one, cis-trans form carbonic (HOCOOH), toward Galactic center molecular cloud G+0.693–0.027. HOCOOH stands as first molecule containing three oxygen atoms and third detected so far in medium. Albeit limited available laboratory measurements (up to 65 GHz), have also directly identified several pairs unblended lines astronomical data (between 75 120 which...
ABSTRACT Most stars, including the Sun, are born in rich stellar clusters containing massive stars. Therefore, study of chemical reservoir star-forming regions is crucial to understand basic ingredients available at dawn planetary systems. We present a detailed molecular inventory hot core G31.41+0.31 from project GUAPOS (G31.41+0.31 Unbiased ALMA sPectral Observational Survey). analyse 34 species for first time plus 20 analysed previous works, oxygen, nitrogen, sulfur, phosphorus, and...
Following the discovery of dimethyl sulfide (CH$_3$SCH$_3$, DMS) signatures in comet 67P/Churyumov-Gerasimenko, we report first detection this organosulfur species interstellar medium, during exploration an ultradeep molecular line survey performed toward Galactic Center cloud G+0.693-0.027 with Yebes 40$\,$m and IRAM 30$\,$m telescopes. We derive a column density $N$ = (2.6 $\pm$ 0.3)$\times$10$^{13}$ cm$^{-2}$, yielding fractional abundance relative to H$_2$ $\sim$1.9$\times$10$^{-10}$....
Context. The G31.41+0.31 Unbiased ALMA sPectral Observational Survey (GUAPOS) project targets the hot molecular core (HMC) (G31) to reveal complex chemistry of one most chemically rich high-mass star-forming regions outside Galactic center (GC). Aims. In third paper we present a study nine O-bearing (CH 3 OH, 13 CH 18 OH , CHO, OCH COCH C 2 H 5 aGg′-(CH OH) and gGg′-(CH ) six N-bearing CN, CN) organic molecules toward G31. aim this work is characterize abundances in G31 compare them with...
It is clearly established that the Sun has an 11-year cycle caused by its internal magnetic field. This also observed in a sample of M dwarfs. In framework exoplanet detection or atmospheric characterisation exoplanets, activity status host star plays crucial role, and inactive states are preferable for such studies. means it important to know cycles these stars. We study systematic long-term variability 211 dwarfs with CARMENES, high-resolution optical near-infrared spectrograph at Calar...
Abstract We report the first detection of metal-bearing molecules sodium sulfide and magnesium tentative calcium monoxide in interstellar medium toward Galactic center molecular cloud G+0.693-0.027. The derived column densities are (5.0 ± 1.1) × 10 cm −2 , (6.0 0.6) (2.0 0.5) respectively. This translates into fractional abundances with respect to H 2 (3.7 1.0) −13 (4.4 0.8) (1.5 0.4) have also searched for other Na-, Mg-, Ca-bearing species this source but none them been detected thus we...
In this study, abundances of the neutron-capture elements Rb, Sr, and Zr are derived, for first time, in a sample nearby M dwarfs. We focus on stars metallicity range -0.5<[Fe/H]<+0.3, an interval poorly explored Rb previous analyses. To do we use high-resolution, high-signal-to-noise-ratio, optical near-infrared spectra 57 dwarfs observed with CARMENES. The resulting [Sr/Fe] [Zr/Fe] ratios most almost constant at about solar value, identical to those found GK same metallicity. However, find...
There are several strong K I lines found in the spectra of M dwarfs, among them doublet near 7700 AA and another 12 500 AA. We study these optical near-infrared doublets a sample 324 observed with CARMENES, high-resolution spectrograph at Calar Alto, investigate how well can be used as photospheric chromospheric diagnostics. Both have dominant component inactive stars tracers effective temperature gravity. For variability studies using doublet, we concentrate on red line because this is less...
We present the first detection in space of O-protonated carbonyl sulfide (\ch{HOCS+}), midst an ultradeep molecular line survey toward G+0.693-0.027 cloud. From observation all $K$$_a$ = 0 transitions ranging from $J$$_{lo}$ 2 to 13 \ch{HOCS+} covered by our survey, we derive a column density $N$ (9 $\pm$ 2)$\times$10$^{12}$ cm$^{-2}$, translating into fractional abundance relative H$_2$ $\sim$7$\times$10$^{-11}$. Conversely, S-protonated \ch{HSCO+} isomer remains undetected, and upper limit...
We report the first detection of metal-bearing molecules sodium sulfide (NaS) and magnesium (MgS) tentative calcium monoxide (CaO) in interstellar medium (ISM) towards Galactic Center molecular cloud G+0.693-0.027. The derived column densities are (5.0+-1.1) x $10^{10}$ cm$^{-2}$, (6.0+-0.6) (2.0+-0.5) respectively. This translates into fractional abundances with respect to H$_2$ (3.7+-1.0) $10^{-13}$, (4.4+-0.8) (1.5+-0.4) have also searched for other Na-, Mg- Ca-bearing species this source...
Context. The astrochemistry of the important biogenic element phosphorus (P) is still poorly understood, but observational evidence indicates that P-bearing molecules are likely associated with shocks. Aims. We study and some shock tracers towards one chemically richest hot molecular cores, G31.41+0.31, in framework project “G31.41+0.31 Unbiased ALMA sPectral Observational Survey” (GUAPOS), which being carried out Atacama Large Millimeter Array (ALMA). Methods. observed PN, PO, SO, SO 2 ,...
We report on the high-resolution spectroscopic observations of two planetary transits hot Jupiter KELT-7b ($M_{\rm p}$ $=$ 1.28 $\pm$ 0.17 M$_{\rm Jup}$, $T_{\rm eq}$ 2028 K) observed with High Optical Resolution Spectrograph (HORuS) mounted 10.4-m Gran Telescopio Canarias (GTC). A new set stellar parameters are obtained for rapidly rotating parent star from analysis spectra. Using newly derived mass and radius, transit data Transiting Exoplanet Survey Satellite (TESS) together HORuS...
We report the first detection in interstellar medium of $N$-cyanomethanimine (H$_2$CNCN), stable dimer HCN highest energy, and most complex organic molecule identified space containing prebiotically relevant NCN backbone. have a plethora $a$-type rotational transitions with 3 $\leq J_\text{up} \leq$ 11 $K_\text{a} 2 that belong to this species towards Galactic Center G+0.693-0.027 molecular cloud, only source showing three cyanomethanimine isomers (including $Z$- $E$- $C$-cyanomethanimine,...
Abstract We present the first detection in space of thionylimide (HNSO) toward Galactic center molecular cloud G + 0.693-0.027, thanks to superb sensitivity an ultradeep line survey carried out with Yebes 40 m and IRAM 30 telescopes. This molecule is species detected interstellar medium containing, simultaneously, N, S, O. have identified numerous K a = 0, 1, 2 transitions belonging HNSO covering from J up =10, including several completely unblended features. derive column density N (8 ±...
The production of silicon monoxide (SiO) can be considered as a fingerprint shock interaction. In this work, we use high-sensitivity observations the SiO (2-1) and H$^{13}$CO$^{+}$ (1-0) emission to investigate broad narrow toward 146 massive star-forming regions in ATOMS survey. We detected 136 distinguished components across extension 118 sources (including 58 UC $H_{II}$ regions) with an average angular resolution 2.5$^{\prime}$$^{\prime}$. derived luminosity ($L_{SiO}$) whole sample...
Abstract The production of silicon monoxide (SiO) can be considered as a fingerprint shock interaction. In this work, we use high-sensitivity observations the SiO (2-1) and H13CO+ (1-0) emission to investigate broad narrow toward 146 massive star-forming regions in ATOMS survey. We detected 136 distinguished components across extension 118 sources (including 58 UC H ii regions) with an average angular resolution 2.5′ ′. derived luminosity ($L_\mbox{SiO}$) whole sample shows that majority...
Most stars, including the Sun, are born in rich stellar clusters containing massive stars. Therefore, study of chemical reservoir star-forming regions is crucial to understand basic ingredients available at dawn planetary systems. We present a detailed molecular inventory hot core G31.41+0.31 from project GUAPOS (G31.41+0.31 Unbiased ALMA sPectral Observational Survey). analyze 34 species for first time plus 20 analyzed previous works, oxygen, nitrogen, sulfur, phosphorus, and chlorine...