- ID:
- ivo://CDS.VizieR/J/A+A/636/A33
- Title:
- Glutaronitrile rotational spectroscopy
- Short Name:
- J/A+A/636/A33
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Nitriles constitute almost 15% of the molecules observed in the interstellar medium (ISM), surprisingly only two dinitriles have been detected in the ISM so far. The lack of astronomical detections for dinitriles may be partly explained by the absence of laboratory rotational spectroscopic data. Our goal is the investigation of the rotational spectrum of glutaronitrile, NC-CH_2_-CH_2_-CH_2_-CN, in order to allow its possible detection in the ISM. The rotational spectra of glutaronitrile was measured using two different experimental setups. A Fourier transform microwave spectrometer was employed to observe the supersonic jet rotational spectrum of glutaronitrile between 6 and 20GHz. In addition the mmW spectrum was observed in the frequency range 72-116.5GHz using a broadband millimeter-wave spectrometer based on radio astronomy receivers with fast Fourier transform backends. The spectral searches were supported by high-level ab initio calculations. A total of 111 rotational transitions with maximum values of J and Ka quantum numbers 54 and 18, respectively, were measured for the gg conformer of glutaronitrile. The analysis allowed us to accurately determine the rotational, nuclear quadrupole coupling, quartic and sextic centrifugal distortion constants. These rotational parameters were employed to search for glutaronitrile in the cold and warm molecular clouds Orion KL, Sgr B2(N), B1-b and TMC-1, using the spectral surveys captured by IRAM 30m at 3mm. Glutaronitrile was not detected and the upper limits column densities are derived. Those are a factor of 1.5 and 5 lower than those obtained for the total column densities of the analogous succionitrile in Orion KL and Sgr B2, respectively.
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Search Results
- ID:
- ivo://CDS.VizieR/J/A+A/599/A121
- Title:
- Glycolaldehyde in Perseus young solar analogs
- Short Name:
- J/A+A/599/A121
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The earliest evolutionary stages of low-mass protostars are characterised by the so-called hot-corino stage, when the newly born star heats the surrounding material and enrich the gas chemically. Studying this evolutionary phase of solar protostars may help understand the evolution of prebiotic complex molecules in the development of planetary systems. In this paper we focus on the occurrence of glycolaldehyde (HCOCH_2_OH) in young solar analogs by performing the first homogeneous and unbiased study of this molecule in the Class 0 protostars of the nearby Perseus star forming region. We obtained sub-arcsec angular resolution maps at 1.3mm and 1.4mm of glycolaldehyde emission lines using the IRAM Plateau de Bure (PdB) interferometer in the framework of the CALYPSO IRAM large program.
- ID:
- ivo://CDS.VizieR/J/A+A/639/A135
- Title:
- Glycolamide rotational transitions
- Short Name:
- J/A+A/639/A135
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Glycolamide is a glycine isomer and also one of the simplest derivatives of acetamide (one hydrogen atom replaced with a hydroxyl group), which is a known interstellar molecule. In this context, the aim of our work is to provide direct experimental frequencies of the ground vibrational state of glycolamide in the centimeter-, millimeter- and submillimeter wavelength regions in order to enable its identification in the interstellar medium. We employed a battery of state-of-the-art rotational spectroscopic techniques in the frequency and time domain to measure its frequencies. We used the spectral line survey named EMoCA (Exploring Molecular Complexity with ALMA) that was performed toward the star forming region Sgr B2(N) with ALMA to search for glycolamide in space. We also searched for glycolamide toward Sgr B2(N) with the Effelsberg radio telescope. The astronomical spectra were analyzed under the local thermodynamic equilibrium approximation.We used the gas-grain chemical kinetics mode MAGICKAL to interpret the results of the astronomical observations. About 1500 transitions have been newly assigned up to 460GHz to the most stable conformer, and a precise set of spectroscopic constants was determined. Spectral features of glycolamide were then searched for in the prominent hot molecular core Sgr B2(N2). We report the non-detection of glycolamide toward this source with an abundance at least six and five times lower than that of acetamide and glycolaldehyde, respectively. Our astrochemical model suggests that glycolamide may be present in this source at a level just below the upper limit derived from the EMoCA survey. We could also not detect the molecule in the region s extended molecular envelope probed with the Effelsberg telescope. We find an upper limit to its column density that is similar to the column densities obtained earlier for acetamide and glycolaldehyde with theGreen Bank Telescope.
7484. GMAP
- ID:
- ivo://padc.obspm.planeto/gmap/q/epn_core
- Title:
- GMAP
- Short Name:
- gmap.epn_core
- Date:
- 12 Apr 2024 14:41:38
- Publisher:
- Paris Astronomical Data Centre - Constructor University
- Description:
- GMap provides planetary geological maps of different Solar System bodies, developed by an open community, reviewed by scientists. GMap inherits its data model from Planmap, most of the maps provide morphological information, some provide stratigraphic or compositional information too. Each original data packages provided is a collection of vector, raster, and, in some cases, 3D models. In this EPN-TAP service, the data records (`granule_uid`) refer to each of the data files in the whole of GMAP archive, grouped by (`granule_gid`) the data package --map-- they compose.
7485. GMAP
- ID:
- ivo://jacobsuni/gmap/q/epn_core
- Title:
- GMAP
- Short Name:
- gmap.epn_core
- Date:
- 02 Jan 2024 10:01:56
- Publisher:
- JacobsUni EPN node
- Description:
- GMap provides planetary geological maps of different Solar System bodies, developed by an open community, reviewed by scientists. GMap inherits data model from Planmap, most of the maps provide morphological information, some maps provide stratigraphic or compositional information too. Each original data packages provided is a collection of vector, raster, and, in some cases, 3D models. In this EPN/TAP service, the data records (`granule_uid`) refer to each of the data files in the whole of GMAP archive, grouped by (`granule_gid`) the data package --map-- they compose.
7486. GMASS photometry
- ID:
- ivo://CDS.VizieR/J/A+A/549/A63
- Title:
- GMASS photometry
- Short Name:
- J/A+A/549/A63
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We designed a spectroscopic observing campaign of a sample of both massive, quiescent and star-forming galaxies at z>1.4, called Galaxy Mass Assembly ultra-deep Spectroscopic Survey (GMASS). To determine redshifts and physical properties, such as metallicity, dust content, dynamical masses, and star formation history, we performed ultra-deep spectroscopy with the red-sensitive optical spectrograph FORS2 at the VLT. Our sample consists of objects, within the CDFS/GOODS area, detected at 4.5 micron, to be sensitive to stellar mass rather than star formation intensity. The spectroscopic targets were selected with a photometric redshift constraint (z>1.4) and magnitude constraints (B(AB)<26, I(AB)<26.5), which should ensure that these are faint, distant, and fairly massive galaxies. Up to 30 hours of spectroscopy of 174 spectroscopic targets and 70 additional objects enabled us to determine 210 redshifts, of which 145 are at z>1.4. We publicly release the redshifts and reduced spectra.
- ID:
- ivo://CDS.VizieR/J/ApJS/191/254
- Title:
- GMBCG galaxy cluster catalog from SDSS DR7
- Short Name:
- J/ApJS/191/254
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a large catalog of optically selected galaxy clusters from the application of a new Gaussian Mixture Brightest Cluster Galaxy (GMBCG) algorithm to SDSS Data Release 7 data. The algorithm detects clusters by identifying the red-sequence plus brightest cluster galaxy (BCG) feature, which is unique for galaxy clusters and does not exist among field galaxies. Red-sequence clustering in color space is detected using an Error Corrected Gaussian Mixture Model. We run GMBCG on 8240 deg^2^ of photometric data from SDSS DR7 to assemble the largest ever optical galaxy cluster catalog, consisting of over 55,000 rich clusters across the redshift range from 0.1<z<0.55. We present Monte Carlo tests of completeness and purity and perform cross-matching with X-ray clusters and with the maxBCG sample at low redshift. These tests indicate high completeness and purity across the full redshift range for clusters with 15 or more members.
- ID:
- ivo://CDS.VizieR/J/MNRAS/418/1994
- Title:
- GM 2-4 H_2_ emission-line objects
- Short Name:
- J/MNRAS/418/1994
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a multi-wavelength study of the region towards the GM 2-4 nebula and the nearby source IRAS 05373+2340. Our near-infrared H_2_ 1-0 S(1) line observations reveal various shock-excited features which are part of several bipolar outflows. We identify candidates for the driving sources of the outflows from a comparison of the multi-waveband archival data sets and spectral energy distribution (SED) modelling. The SED spectral slope ({alpha}^IRAC^) for all the protostars in the field was then compared with the visual extinction map. This comparison suggests that star formation progresses from north-east to south-west across this region.
7489. G29.37+0.1 610MHz image
- ID:
- ivo://CDS.VizieR/J/A+A/602/A31
- Title:
- G29.37+0.1 610MHz image
- Short Name:
- J/A+A/602/A31
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We report on the first detailed multiwavelength study of the radio source G29.37+0.1, which is an as-yet-unclassified object linked to the very-high-energy gamma-emitting source HESS J1844-030. The origin of the multiwavelength emission toward G29.37+0.1 has not been clarified so far, leaving open the question about the physical relationship between these sources. Using observations carried out with the Giant Metrewave Radio Telescope (GMRT), we performed high-quality full-synthesis imaging at 610MHz of the field containing G29.37+0.1. The obtained data, combined with observations at 1400MHz from the MAGPIS were used to investigate in detail the properties of its radio emission. Additionally, we reprocessed archival data obtained with the XMM-Newton and Chandra observatories in order to get a multiwavelength view of this unusual source. The radio source G29.37+0.1 mainly consists of a bright twisted structure, named the S-shaped feature. The high sensitivity of the new GMRT observations allowed the identification of potential lobes, jets and a nuclear central region in the S-shaped morphology of G29.37+0.1. We also highlight the detection of diffuse and low surface brightness emission enveloping the brightest emitting regions. The brightest emission in G29.37+0.1 has a radio synchrotron spectral index alpha=0.59+/-0.09. Variations in the spectral behaviour are observed across the whole radio source with the flattest spectral features in the central nuclear and jets components (alpha~0.3). These results lead us to conclude that the brightest radio emission from G29.37+0.1 likely represents a newly recognized radio galaxy. The identification of optical and infrared counterparts to the emission arising from the core of G29.37+0.1 strengthens our interpretation of an extragalactic origin of the radio emission. We performed several tests to explain the physical mechanism responsible for the observed X-ray emission, which appears overlapping the northeastern part of the radio emission. Our spectral analysis demonstrated that a non-thermal origin for the X-ray emission compatible with a pulsar wind nebula is quite possible. The analysis of the spatial distribution of the CO gas revealed the presence of a complex of molecular clouds located in projection adjacent to the radio halo emission and probably interacting with it. We propose that the faint halo represents a composite supernova remnant with a pulsar powered component given by the diffuse X-ray emission superimposed along the line of sight to the radio galaxy. Further broadband observations of HESS J1844-030 are needed to disentangle its origin, although its shape and position suggest an extragalactic origin connected to G29.37+0.1.
- ID:
- ivo://CDS.VizieR/J/A+A/569/A110
- Title:
- GMOS-IFU spectroscopy of dwarf galaxy HS 2236+1344
- Short Name:
- J/A+A/569/A110
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- The main goal of this study is to carry out a spatially resolved investigation of the warm interstellar medium (ISM) in the extremely metal-poor blue compact dwarf galaxy HS 2236+1344. Special emphasis is laid on the analysis of the spatial distribution of chemical abundances, emission-line ratios and kinematics of the ISM, and to the recent star-forming activity in this galaxy.
