- ID:
- ivo://CDS.VizieR/J/A+A/400/1043
- Title:
- Spectroscopic atlas of Deneb 3826-5212{AA}
- Short Name:
- J/A+A/400/1043
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a spectroscopic atlas of Deneb (A2 Iae) obtained with the long camera of the 1.22-m telescope of the Dominion Astrophysical Observatory using Reticon and CCD detectors. For {lambda}{lambda}3826-5212 the inverse dispersion is 2.4{AA}/mm with a resolution 0.072{AA}. At the continuum the mean signal-to-noise ratio is 1030. The wavelengths in the laboratory frame, the equivalent widths, and the identifications of the various spectral features are given. This atlas should provide useful guidance for studies of other stars with similar spectral types. The stellar and synthetic spectra with their corresponding line identifications can be examined at http://www.brandonu.ca/physics/gulliver/atlases.html .
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- ID:
- ivo://CDS.VizieR/J/A+A/425/263
- Title:
- Spectroscopic atlas of HD175640
- Short Name:
- J/A+A/425/263
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a high resolution spectral atlas of the HgMn star HD 175640 covering the 3040-10000{AA} region. UVES spectra observed with 90000-110000 resolving power and signal to noise ratio ranging from 200 to 400 are compared with a synthetic spectrum computed with the SYNTHE code (Kurucz, 1993, CD-ROM, No. 18). The model atmosphere is an ATLAS12 model (Kurucz, 1997, in The 3rd Conf. on Faint Blue Stars, ed. Philip, Liebert & Saffer (Schenectady: L. Davis Press), 33) with parameters Teff=12000K,logg=3.95, vturb=0km/s. The stellar individual abundances in ATLAS12 were derived from an iterative procedure. The starting atomic line lists downloaded from the Kurucz website have been improved and extended by examining different sources in the literature and by comparing the computed profiles with the observed spectrum. The high quality of the data allowed us to study the isotopic and hyperfine structure for several lines of Mn II, Ga II, Ba II, Pt II, Hg I, and Hg II. Numerous weak emission lines from Cr II and Ti II have been identified in the red part of the spectrum, starting at about 5847{AA}. Two emission lines of C I (mult. 10, mult. 9) have been observed for the first time. All Cr II and Ti II emission lines originate from the high excitation states (Elow>89000cm^-1^ for Cr II and Elow>62000cm^-1^ for Ti II) with large transition probabilities (loggf>-1.00). The synthetic spectrum superimposed on the observed spectrum are available at http://wwwuser.oat.ts.astro.it/castelli/stars.html . An extended discussion on each identified ion and related atomic data is available both in the quoted website and in an electronic Appendix to the paper.
- ID:
- ivo://CDS.VizieR/J/A+A/413/285
- Title:
- Spectroscopic atlas of o Per 3826-4882{AA}
- Short Name:
- J/A+A/413/285
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a spectroscopic atlas of the sharp-lined, hot metallic-line star o Pegasi (A1 IV) based on spectrograms obtained with the long camera of the 1.22-m telescope of the Dominion Astrophysical Observatory using a Reticon detector. For 3826-4882 the inverse dispersion is 2.4{AA}/mm with a resolution of 0.072{AA}. At the continuum the mean signal-to-noise ratio is 800. The wavelengths in the laboratory frame, the equivalent widths, and the identifications of the various spectral features are given. The stellar and synthetic spectra with their corresponding line identifications can be examined at http://www.brandonu.ca/physics/gulliver/atlases.html .
- ID:
- ivo://CDS.VizieR/J/AJ/137/3743
- Title:
- Spectroscopic binary orbits in NGC 188
- Short Name:
- J/AJ/137/3743
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present 98 spectroscopic binary orbits resulting from our ongoing radial velocity survey of the old (7Gyr) open cluster NGC 188.
- ID:
- ivo://CDS.VizieR/J/ApJ/821/8
- Title:
- Spectroscopic binary population of ONC and NGC2264
- Short Name:
- J/ApJ/821/8
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We examine the spectroscopic binary population for two massive nearby regions of clustered star formation, the Orion Nebula Cluster (ONC) and NGC 2264, supplementing the data presented by Tobin et al. (2009, J/ApJ/697/1103) with more recent observations and more extensive analysis. The inferred multiplicity fraction up to 10 au based on these observations is 5.3+/-1.2% for NGC 2264 and 5.8+/-1.1% for the ONC; these values are consistent with the distribution of binaries in the field in the relevant parameter range. Eight of the multiple systems in the sample have enough epochs to perform an initial fit for the orbital parameters. Two of these sources are double-lined spectroscopic binaries; for them, we determine the mass ratio. Our reanalysis of the distribution of stellar radial velocities toward these clusters presents a significantly better agreement between stellar and gas kinematics than was previously thought.
- ID:
- ivo://CDS.VizieR/J/ApJS/188/280
- Title:
- Spectroscopic catalog in 24 clusters
- Short Name:
- J/ApJS/188/280
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present a spectroscopic catalog of (mostly) red galaxies in 24 galaxy clusters in the redshift range 0.17<z<0.92 obtained with the LRIS instrument on the Keck I telescope. Here we describe the observations and the galaxy spectra, including the discovery of three cD galaxies with LINER emission spectra, and the spectroscopic discovery of four new galaxy-galaxy lenses in cluster environments. All but two of the galaxy clusters observed as part of this experiment were previously known.
- ID:
- ivo://CDS.VizieR/J/ApJS/122/51
- Title:
- Spectroscopic catalog of 10 rich galaxy clusters
- Short Name:
- J/ApJS/122/51
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- We present spectroscopic observations of galaxies in the fields of 10 distant clusters for which we have previously presented deep imaging with WFPC2 on board the Hubble Space Telescope. The clusters span the redshift range z=0.37-0.56 and are the subject of a detailed ground- and space-based study to investigate the evolution of galaxies as a function of environment and epoch. The data presented here include positions, photometry, redshifts, spectral line strengths, and classifications for 657 galaxies in the fields of the 10 clusters. The catalog is composed of 424 cluster members across the 10 clusters and 233 field galaxies, with detailed morphological information from our WFPC2 images for 204 of the cluster galaxies and 71 in the field. We illustrate some basic properties of the catalog, including correlations between the morphological and spectral properties of our large sample of cluster galaxies. A direct comparison of the spectral properties of the high-redshift cluster and field populations suggests that the phenomenon of strong Balmer lines in otherwise passive galaxies (commonly called E + A but renamed here as the k + a class) shows an order-of-magnitude increase in the rich cluster environment compared with a more modest increase in the field population. This suggests that the process or processes involved in producing k + a galaxies are either substantially more effective in the cluster environment or that this environment prolongs the visibility of this phase. A more detailed analysis and modeling of these data is presented in Poggianti et al. (1999ApJ...518..576P).
- ID:
- ivo://CDS.VizieR/J/A+A/538/A52
- Title:
- Spectroscopic data for ionized scandium
- Short Name:
- J/A+A/538/A52
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Spectroscopic data for scandium is sparse, while an extensive set is needed to introduce this element into stellar opacity calculations and, more importantly, into stellar models dealing with radiative diffusion. Our goal is to provide extensive energy levels and radiative transitions data for nineteen ionization stages of scandium relevant to stellar interiors, namely from Sc III to Sc XXI. We used the FAC code. This code provides ab initio theoretical values for energy levels in jj-coupling and oscillator strengths of all permitted transitions. Detailed correspondences are established with compiled data from the National Institute of Standards and Technology (NIST) database, to locate as much as possible the observed levels and lines at their experimental values and to estimate the quality of our data. Comparisons were also made with the spectroscopic data delivered by Kurucz. The theoretical data retained in tables include 21842 levels and more than two millions transitions. By comparison, the NIST compilation gives a total of 820 levels and 677 gf-values. The good agreement obtained when comparing the new data with those of the NIST compilation demonstrates their quality. This work on scandium shows that the FAC code is efficient in providing spectroscopic data that are unavailable from laboratory analyses but necessary for accurate simulations of stellar plasmas.
- ID:
- ivo://CDS.VizieR/J/A+A/328/551
- Title:
- Spectroscopic data of 4 Herculis
- Short Name:
- J/A+A/328/551
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- A collection of spectroscopic data of 4 Her at our disposal (RV and spectrophotometric measurements) consist of spectra obtained at the Ondrejov and Haute Provence Observatories. Table 1 summarizes the measurements of radial velocities and line intensities carried out in the red spectra. In Table 2 a list of the spectra and RV measurements for the violet-blue region is given.
- ID:
- ivo://CDS.VizieR/J/A+A/442/211
- Title:
- Spectroscopic distances of 322 NLTT stars
- Short Name:
- J/A+A/442/211
- Date:
- 21 Oct 2021
- Publisher:
- CDS
- Description:
- Distance estimates based on low-resolution spectroscopy and Two Micron All Sky Survey (2MASS, Cat. <II/246>) J magnitudes are presented for 322 nearby candidates from Luyten's NLTT catalogue (<I/98>). Mainly relatively bright (typically 7<Ks<11) and red high proper motion stars have been selected according to their 2MASS magnitudes and optical-to-infrared colours (+1<R-Ks<+7). Some LHS stars previously lacking spectroscopy have also been included. We have classified the majority of the objects as early-M dwarfs (M2-M5). More than 70% of our targets turned out to lie within the 25pc horizon of the catalogue of nearby stars, with 50 objects placed within 15pc and 8 objects being closer than 10pc. Three objects in the 10pc sample have no previously published spectral type: LP 876-10 (M4), LP 870-65 (M4.5), and LP 869-26 (M5). A large fraction of the objects in our sample (57%) ave independent distance estimates, mainly by the recent efforts of Reid and collaborators. Our distance determinations are generally in good agreement with theirs. 11 rather distant (d>100pc) objects have also been identified, including a probable halo, but relatively hot (Teff=13000K) white dwarf (LHS 1200) and 10 red dwarfs with extremely large tangential velocities (250<v_t_<1150km/s). Altogether, there are 11 red dwarfs (including one within 70pc) with tangential velocities larger than about 250km/s. All these objects are suspected to be in fact subdwarfs, if so, their distances would be only about half of our original estimates. The three most extreme objects in that respect are the K and early M dwarfs LP 323-168, LHS 5343 and LP 552-21 with corrected distances between 180pc and 400pc and resulting tangential velocities still larger than about 400km/s.