- ID:
- ivo://CDS.VizieR/J/AJ/136/2158
- Title:
- CV Boo V-band and radial velocity curves
- Short Name:
- J/AJ/136/2158
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present new V-band differential brightness measurements as well as new radial-velocity measurements of the detached, circular, 0.84-day period, double-lined eclipsing binary system, CV Boo. These data, along with other observations from the literature, are combined to derive improved absolute dimensions of the stars for the purpose of testing various aspects of theoretical modeling.
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- ID:
- ivo://CDS.VizieR/J/MNRAS/488/2175
- Title:
- CVRHS classifications for 719 AMIGA galaxies
- Short Name:
- J/MNRAS/488/2175
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Using images from Sloan Digital Sky Survey Data Release 8, we have re-examined the morphology of 719 galaxies from the Analysis of the interstellar Medium in Isolated GAlaxies (AMIGA) project, a sample consisting of the most isolated galaxies that have yet been identified. The goal is to further improve the classifications of these galaxies by examining them in the context of the Comprehensive de Vaucouleurs revised Hubble-Sandage (CVRHS) system, which includes recognition of features that go beyond the original de Vaucouleurs point of view. Our results confirm previous findings that isolated galaxies are found across the complete revised Hubble sequence, with intermediate to late-type (Sb-Sc) spirals being relatively more common. Elmegreen Arm Classifications are also presented, and show that more than 50\% of the 514 spirals in the sample for which an arm class could be judged are grand design (AC 8,9,12). The visual bar fraction for the sample is ~50%, but only 16% are classified as strongly-barred (SB). The dominant family classification is SA (nonbarred), the dominant inner variety classification is (s) (pure spiral), and the dominant outer variety classification is no outer ring, pseudoring, or lens. The Kolmogorov-Smirnov test is used to check for potential biases in the morphological interpretations, and for any possible relation between rings, bars, and arm classes with local environment and far-infrared excess. The connection between morphology and stellar mass is also examined for a subset of the sample.
- ID:
- ivo://CDS.VizieR/J/MNRAS/488/590
- Title:
- CVRHS classifications for the EFIGI Galaxy Sample
- Short Name:
- J/MNRAS/488/590
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This paper is the third which examines galaxy morphology from the point of view of comprehensive de Vaucouleurs revised Hubble-Sandage (CVRHS) classification, a variation on the original de Vaucouleurs classification volume that accounts for finer details of galactic structure, including lenses, nuclear structures, embedded disks, boxy and disky components, and other features. The classification is applied to the EFIGI sample, a well-defined set of nearby galaxies which were previously examined by Baillard et al. (2011, Cat. J/A+A/532/A74) and de Lapparent et al. (2011A&A...532A..75D). The survey is focussed on statistics of features, and brings attention to exceptional examples of some morphologies, such as skewed bars, blue bar ansae, bar-outer pseudoring misalignment, extremely elongated inner SB rings, outer rings and lenses, and other features that are likely relevant to galactic secular evolution and internal dynamics. The possibility of using these classifications as a training set for automated classification algorithms is also discussed.
- ID:
- ivo://CDS.VizieR/J/MNRAS/471/4027
- Title:
- CVRHS classifications for the GZ2 Ring Sample
- Short Name:
- J/MNRAS/471/4027
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Rings are important and characteristic features of disc-shaped galaxies. This paper is the first in a series that re-visits galactic rings with the goals of further understanding the nature of the features and for examining their role in the secular evolution of galaxy structure. The series begins with a new sample of 3962 galaxies drawn from the Galaxy Zoo 2 citizen science data base, selected because zoo volunteers recognized a ring-shaped pattern in the morphology as seen in Sloan Digital Sky Survey colour images. The galaxies are classified within the framework of the Comprehensive de Vaucouleurs revised Hubble-Sandage system. It is found that zoo volunteers cued on the same kinds of ring-like features that were recognized in the 1995 Catalogue of Southern Ringed Galaxies. This paper presents the full catalogue of morphological classifications, comparisons with other sources of classifications and some histograms designed mainly to highlight the content of the catalogue. The advantages of the sample are its large size and the generally good quality of the images; the main disadvantage is the low physical resolution that limits the detectability of linearly small rings such as nuclear rings. The catalogue includes mainly inner and outer disc rings and lenses. Cataclysmic ('encounter-driven') rings (such as ring and polar ring galaxies) are recognized in less than 1 per cent of the sample.
- ID:
- ivo://CDS.VizieR/J/AJ/142/181
- Title:
- CVs from SDSS. VIII. The final year
- Short Name:
- J/AJ/142/181
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- This paper completes the series of cataclysmic variables (CVs) identified from the Sloan Digital Sky Survey (SDSS) I/II. The coordinates, magnitudes, and spectra of 33 CVs are presented. Among the 33 are eight systems known prior to SDSS (CT Ser, DO Leo, HK Leo, IR Com, V849 Her, V405 Peg, PG1230+226, and HS0943+1404), as well as nine objects recently found through various photometric surveys. Among the systems identified since the SDSS are two polar candidates, two intermediate polar candidates, and one candidate for containing a pulsating white dwarf. Our follow-up data have confirmed a polar candidate from Paper VII and determined tentative periods for three of the newly identified CVs. A complete summary table of the 285 CVs with spectra from SDSS I/II is presented as well as a link to an online table of all known CVs from both photometry and spectroscopy that will continue to be updated as future data appear.
- ID:
- ivo://CDS.VizieR/J/ApJS/233/11
- Title:
- Cyanoacetylene (HC_3_N) infrared spectrum
- Short Name:
- J/ApJS/233/11
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- HC_3_N is a ubiquitous molecule in interstellar environments, from external galaxies to Galactic interstellar clouds, star-forming regions, and planetary atmospheres. Observations of its rotational and vibrational transitions provide important information on the physical and chemical structures of the above environments. We present the most complete global analysis of the spectroscopic data of HC_3_N. We recorded the high-resolution infrared spectrum from 450 to 1350cm^-1^, a region dominated by the intense {nu}_5_ and {nu}_6_ fundamental bands, located at 660 and 500cm^-1^, respectively, and their associated hot bands. Pure rotational transitions in the ground and vibrationally excited states were recorded in the millimeter and submillimeter regions in order to extend the frequency range so far considered in previous investigations. All of the transitions from the literature and from this work involving energy levels lower than 1000cm^-1^ were fitted together to an effective Hamiltonian. Because of the presence of various anharmonic resonances, the Hamiltonian includes a number of interaction constants, in addition to the conventional rotational and vibrational l-type resonance terms. The data set contains about 3400 ro-vibrational lines of 13 bands and some 1500 pure rotational lines belonging to 12 vibrational states. More than 120 spectroscopic constants were determined directly from the fit, without any assumption deduced from theoretical calculations or comparisons with similar molecules. An extensive list of highly accurate rest frequencies was produced to assist astronomical searches and data interpretation. These improved data enabled a refined analysis of the ALMA observations toward Sgr B2(N2).
- ID:
- ivo://CDS.VizieR/J/A+A/638/A3
- Title:
- Cyanoketene (NC-CH=C=O) mm wave spectroscopy
- Short Name:
- J/A+A/638/A3
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Ketene was detected in the interstellar medium (ISM) in 1977. Until now, only one derivative, the ketenyl radical, has been observed in this medium. Due to its large dipole moment value, cynaoketene is one of the best candidates for possible ketene derivative detection. Aims.To date, the measurements of the rotational spectra have been limited to 60GHz. The extrapolation of the prediction in the millimeter wave domain is inaccurate and does not permit an unambiguous detection. The rotational spectra were re-investigated up to 330GHz. Using the new prediction cyanoketene was sought after in a variety of astronomical sources: NGS 63341, SgrB2(N), and ASAI sources. A total of 1594 transitions were newly assigned and fitted together with those from previous studies, reaching quantum numbers up to J=82 and K_a_=24. Watson's asymmetric top Hamiltonian in the I^r^ representation was used for the analysis; both reductions A and S were tested. Logically, the S reduction gave the best results confirming that the molecule is very close to the prolate limit. Cynaoketene was not found in ISM; upper limits to the column density were derived in each source.
- ID:
- ivo://CDS.VizieR/J/A+A/562/A56
- Title:
- Cyanomethyl anion and its deuterated derivatives
- Short Name:
- J/A+A/562/A56
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- It has long been suggested that CH_2_CN^-^ (cyanomethyl anion) might be a carrier of one of the many poorly characterized diffuse interstellar bands. In this paper, our aim is to study various forms (ionic, neutral, and deuterated isotopomer) of CH_2_CN (cyanomethyl radical) in the interstellar medium. The aim of this paper is to predict spectroscopic characteristics of various forms of CH_2_CN and its deuterated derivatives. Moreover, we would like to model the interstellar chemistry for predicting the column densities of such species around dark cloud conditions.
- ID:
- ivo://CDS.VizieR/J/ApJ/724/994
- Title:
- Cyano- to methanol and ammonia observations
- Short Name:
- J/ApJ/724/994
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- As part of an effort to study gas-grain chemical models in star-forming regions as they relate to molecules containing cyanide (-C{\equiv}N) groups, we present here a search for the molecules 2-cyanoethanol (OHCH_2_CH_2_CN) and methoxyacetonitrile (CH_3_OCH_2_CN) in the galactic center region SgrB2. These species are structural isomers of each other and are targeted to investigate the cross-coupling of pathways emanating from the photolysis products of methanol and ammonia with pathways involving cyano-containing molecules. Methanol and ammonia ices are two of the main repositories of the elements C, O, and N in cold clouds and understanding their link to cyanide chemistry could give important insights into prebiotic molecular evolution. Neither species was positively detected, but the upper limits we determined allow comparison to the general patterns gleaned from chemical models. Our results indicate the need for an expansion of the model networks to better deal with cyano-chemistry, in particular with respect to pathways including products of methanol photolysis. In addition to these results, the two main observational routes for detecting new interstellar molecules are discussed.
- ID:
- ivo://CDS.VizieR/J/other/JAD/26.1
- Title:
- CY Aqr CCD photometry 2019-2020 seasons
- Short Name:
- J/other/JAD/26.1
- Date:
- 22 Feb 2022
- Publisher:
- CDS
- Description:
- Based on 28 partial nights of CCD monitoring, we derive 49 new times of maximum light of the SX Phoenicis star CY Aquarii. These times extend the linear ephemeris for a time interval covering the last eight years.