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2051. Carbon stars from IRAS-LRS spectra
ID:
ivo://CDS.VizieR/J/AJ/93/663
Title:
Carbon stars from IRAS-LRS spectra
Short Name:
J/AJ/93/663
Date:
21 Oct 2021
Publisher:
CDS
Description:
The authors have classified 176 IRAS sources as carbon stars based on the presence of the SiC emission feature at 11.2 micron in their low-resolution spectra (LRS). Accurate positions were found by B. Skiff (Lowell Obs.), using visible-light (DSS), 2MASS, and WISE images to identify the carbon stars. Many of the stars are large-amplitude variables, whether designated or not, so sometimes the magnitudes are rounded to a whole magnitude so as to be representative of the brightness. Some notes are added about close companions and two stars where the existing position is significantly in error.
2052. Carbon stars from LAMOST DR2 data
ID:
ivo://CDS.VizieR/J/ApJS/226/1
Title:
Carbon stars from LAMOST DR2 data
Short Name:
J/ApJS/226/1
Date:
21 Oct 2021
Publisher:
CDS
Description:
In this work, we present the new catalog of carbon stars from the LAMOST DR2 catalog. In total, 894 carbon stars are identified from multiple line indices measured from the stellar spectra. We are able to identify the carbon stars by combining the CN bands in the red end with C_2_ and other lines. Moreover, we also classify the carbon stars into spectral sub-types of C-H, C-R, and C-N. These sub-types show distinct features in the multi-dimensional line indices, implying that in the future they can be used to identify carbon stars from larger spectroscopic data sets. While the C-N stars are clearly separated from the others in the line index space, we find no clear separation between the C-R and C-H sub-types. The C-R and C-H stars seem to smoothly transition from one to another. This may hint that the C-R and C-H stars may not be different in their origins, instead their spectra look different because of different metallicities. Due to the relatively low spectral resolution and lower signal-to-noise ratio, the ratio of ^12^C/^13^C is not measured and thus the C-J stars are not identified.
2053. Carbon stars from LAMOST using machine learning
ID:
ivo://CDS.VizieR/J/ApJS/234/31
Title:
Carbon stars from LAMOST using machine learning
Short Name:
J/ApJS/234/31
Date:
21 Oct 2021
Publisher:
CDS
Description:
In this work, we present a catalog of 2651 carbon stars from the fourth Data Release (DR4) of the Large Sky Area Multi-Object Fiber Spectroscopy Telescope (LAMOST). Using an efficient machine-learning algorithm, we find these stars from more than 7 million spectra. As a by-product, 17 carbon-enhanced metal- poor turnoff star candidates are also reported in this paper, and they are preliminarily identified by their atmospheric parameters. Except for 176 stars that could not be given spectral types, we classify the other 2475 carbon stars into five subtypes: 864 C-H, 226 C-R, 400 C-J, 266 C-N, and 719 barium stars based on a series of spectral features. Furthermore, we divide the C-J stars into three subtypes, C-J(H), C-J(R), and C-J(N), and about 90% of them are cool N-type stars as expected from previous literature. Besides spectroscopic classification, we also match these carbon stars to multiple broadband photometries. Using ultraviolet photometry data, we find that 25 carbon stars have FUV detections and that they are likely to be in binary systems with compact white dwarf companions.
2054. Carbon stars from the Hamburg/ESO survey
ID:
ivo://CDS.VizieR/J/A+A/375/366
Title:
Carbon stars from the Hamburg/ESO survey
Short Name:
J/A+A/375/366
Date:
21 Oct 2021
Publisher:
CDS
Description:
This catalog contains 403 Faint High Latitude Carbon (FHLC) stars selected from the digitized objective prism plates of the Hamburg/ESO Survey (HES). Because of the ~15{AA} spectral resolution and high signal-to-noise ratio of the HES prism spectra, our automated procedure based on the detection of C_2_ and CN molecular bands permits high-confidence identification of carbon stars without the need for follow-up spectroscopy. 329 plates (87% of the survey) were examined, covering 6400deg^2^ to a magnitude limit of V~16.5. The catalog lists coordinates, photometry, and carbon band indices for 403 FHLC stars found in the Hamburg/ESO survey. B_J_ magnitudes are accurate to better than +/-0.2mag, including zero point errors. V magnitudes, B-V and U-B colors were derived by the procedure described in Christlieb et al. (2001A&A...366..898C). We also list an object classification for the sources, where "stars", "bright" and "ext" refer to point sources, sources above a saturation threshold, and sources detected as extended in DSS I images, respectively. We do not list V, B-V and U-B for saturated objects, because our color calibrations are not valid for them. Finally, we list two selection flags.
2055. Carbon stars in IC10
ID:
ivo://CDS.VizieR/J/A+A/424/125
Title:
Carbon stars in IC10
Short Name:
J/A+A/424/125
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present wide field CFH12K observations of the highly reddened Local Group galaxy IC 10. Using R,I,CN and TiO filters we identify 676 carbon stars in the field of IC 10. After mapping the reddening in the field, from the colours of the G dwarfs seen along the line of sight, we determine the mean apparent magnitude of the C star population to be <I_0_>=19.78, leading to a true modulus of (m-M)_0_=24.35+/-0.11 (741+/-37kpc). The old red giant stars define an asymmetric halo. With a halo diameter of at least 30', IC 10 is among the largest dwarfs of the Local Group. The surface density of C stars follows a radial power law with a scale length of 2.36', a value nearly identical to the scale length defined by the old giants thus IC 10 has a stellar halo where the old and intermediate-age populations are well mixed.
2056. Carbon stars in Magellanic Clouds
ID:
ivo://CDS.VizieR/J/A+AS/122/463
Title:
Carbon stars in Magellanic Clouds
Short Name:
J/A+AS/122/463
Date:
21 Oct 2021
Publisher:
CDS
Description:
The 16 tables list the heliocentric and galactocentric radial velocities of several hundred carbon stars in the halo of the LMC and SMC. Most of them are newly discovered stars.
2057. Carbon stars in the Galaxy and its satellites
ID:
ivo://CDS.VizieR/J/MNRAS/453/2653
Title:
Carbon stars in the Galaxy and its satellites
Short Name:
J/MNRAS/453/2653
Date:
21 Oct 2021
Publisher:
CDS
Description:
We assemble 121 spectroscopically confirmed halo carbon stars, drawn from the literature, exhibiting measurable variability in the Catalina Surveys. We present their periods and amplitudes, which are used to estimate distances from period-luminosity relationships. The location of the carbon stars - and their velocities when available - allow us to trace the streams of the Sagittarius (Sgr) dwarf spheroidal galaxy. These are compared to a canonical numerical simulation of the accretion of Sgr. We find that the data match this model well for heliocentric distances of 15-50kpc, except for a virtual lack of carbon stars in the trailing arm just north of the Galactic plane, and there is only tentative evidence of the leading arm south of the plane. The majority of the sample can be attributed to the Sgr accretion. We also find groups of carbon stars which are not part of Sgr; most of which are associated with known halo substructures. A few have no obvious attribution and may indicate new substructure. We find evidence that there may be a structure behind the Sgr leading stream apocentre, at ~100kpc, and a more distant extension to the Pisces Overdensity also at ~100kpc. We study a further 75 carbon stars for which no good period data could be obtained, and for which NIR magnitudes and colours are used to estimate distances. These data add support for the features found at distances beyond 100kpc.
2058. Carbon stars spectra and photometry values
ID:
ivo://CDS.VizieR/J/A+A/589/A36
Title:
Carbon stars spectra and photometry values
Short Name:
J/A+A/589/A36
Date:
21 Oct 2021
Publisher:
CDS
Description:
We provide a new collection of spectra of 35 carbon stars obtained with the ESO/VLT X-shooter instrument as part of the X-shooter Spectral Library project. The spectra extend from 0.3um to 2.4um with a resolving power above ~8000. The sample contains stars with a broad range of (J-K) color and pulsation properties located in the Milky Way and the Magellanic Clouds. We show that the distribution of spectral properties of carbon stars at a given (J-K) color becomes bimodal (in our sample) when (J-K) is larger than about 1.5. We describe the two families of spectra that emerge, characterized by the presence or absence of the absorption feature at 1.53um, generally associated with HCN and C_2_H_2_. This feature appears essentially only in large-amplitude variables, though not in all observations. Associated spectral signatures that we interpret as the result of veiling by circumstellar matter, indicate that the 1.53um feature might point to episodes of dust production in carbon-rich Miras.
2059. Carina Nebula Chandra X-Ray Point Source Catalog
ID:
ivo://nasa.heasarc/carinacxo
Title:
Carina Nebula Chandra X-Ray Point Source Catalog
Short Name:
CARINACXO
Date:
21 Feb 2025
Publisher:
NASA/GSFC HEASARC
Description:
This database table contains a catalog of &gt;~ 14,000 X-ray sources observed by the ACIS instrument on the Chandra X-ray Observatory within a 1.42 deg&lt;sup&gt;2&lt;/sup&gt; survey of the Great Nebula in Carina, known as the Chandra Carina Complex Project (CCCP). The study from which this table is taken appeared in a special ApJS issue which was devoted to the CCCP. In it, the authors described the data reduction and analysis procedures performed on the X-ray observations, including calibration and cleaning of the X-ray event data, point-source detection, and source extraction. The catalog appears to be complete across most of the field to an absorption-corrected total-band luminosity of ~ 10&lt;sup&gt;30.7&lt;/sup&gt; erg s&lt;sup&gt;-1&lt;/sup&gt; for a typical low-mass pre-main-sequence star. Counterparts to the X-ray sources were identified in a variety of visual, near-infrared, and mid-infrared surveys. The X-ray and infrared source properties presented herein form the basis of many CCCP studies of the young stellar populations in Carina. The prefixes &#39;fb&#39;, &#39;sb&#39; and &#39;hb&#39; on the names of photometric quantities designate the full or total (0.5-8 keV), soft (0.5-2 keV), and hard (2-8 keV) energy bands. Source significance quantities (fb_prob_no_src, sb_prob_no_src, hb_prob_no_src, prob_no_src_min) were computed using a subset of each source&#39;s extractions chosen to maximize significance (Broos et al. 2010, ApJ, 714, 1582, hereafter B10, Section 6.2). X-ray source position quantities (RA, Dec, error_radius) were computed using a subset of each source&#39;s extractions chosen to minimize the position uncertainty (B10, Sections 6.2 and 7.1). All other quantities were computed using a subset of each source&#39;s extractions chosen to balance the conflicting goals of minimizing photometric uncertainty and of avoiding photometric bias (B10, Sections 6.2 and 7). A summary of the counterpart catalogs that were correlated with the Chandra Carina sources is given in Table 5 of the reference paper and is listed below: &lt;pre&gt; Catalog Scope Reference Skiff Visual spectral types Skiff (2009, VizieR Online Data Catalog, 1, 2023) KR Visual photometry Kharchenko &amp; Roeser (2009, VizieR Online Data Catalog, 1280, 0) PPMXL CCD proper motions (PMs) Roeser et al. (2010, AJ, 139, 2440) UCAC3 CCD PMs Zacharias et al. (2004, AJ, 127, 3043) BSS Bright star PMs Urban et al. (2004, VizieR Online Data Catalog, 1294, 0) CMD Photographic PMs, Tr 14, Tr 16, Cr 232 Cudworth et al. (1993, AJ, 105, 1822) DETWC Visual photometry, Tr 14 &amp; 16 DeGioia-Eastwood et al. (2001, ApJ, 549, 578) MDW Visual spectral types, Cr 228 Massey et al. (2001, AJ, 121, 1050) MJ Visual photometry, Tr 14 &amp; 16 Massey &amp; Johnson (1993, AJ, 105, 980) CP High-mass photometry, Cr 228 Carraro &amp; Patat (2001, A&amp;A, 379, 136) DAY Low-mass photometry, Cr 228 Delgado et al. (2007, A&amp;A, 467, 1397) HAWK-I Deep near-infrared photometry Preibisch et al. (2011, ApJS, 194, 10, CCCP HAWK-I Paper) 2MASS Shallow near-infrared photometry Skrutskie et al. (2006, AJ, 131, 1163) SOFI Deep near-infrared photometry, Tr 14 Ascenso et al. (2007, A&amp;A, 476, 199) NACO Deep near-infrared photometry, Tr 14 Ascenso et al. (2007, A&amp;A, 476, 199) Sana Deep near-infrared photometry, Tr 14 Sana et al. (2010, A&amp;A, 515, A26) SpVela Mid-infrared photometry (Spitzer) Povich et al. (2011, ApJS, 194, 14, CCCP IR YSOs Paper) SpSmith Mid-infrared photometry (Spitzer) Smith et al. (2010, MNRAS, 406, 952) AC ACIS observation of Tr 16 Albacete-Colombo et al. (2008, A&amp;A, 490, 1055) &lt;/pre&gt; This table was created by the HEASARC in May 2011 based on the electronic versions of Tables 2 and 6 from the reference paper which were obtained from the ApJS web site. This is a service provided by NASA HEASARC .
2060. Carina Nebula Chandra X-Ray Point Source Classes
ID:
ivo://nasa.heasarc/carinaclas
Title:
Carina Nebula Chandra X-Ray Point Source Classes
Short Name:
CARINACLAS
Date:
21 Feb 2025
Publisher:
NASA/GSFC HEASARC
Description:
The Chandra Carina Complex Project (CCCP) provides a sensitive X-ray survey of a nearby starburst region over &gt; 1 deg&lt;sup&gt;2&lt;/sup&gt; in extent. Thousands of faint X-ray sources are found, many concentrated into rich young stellar clusters. However, significant contamination from unrelated Galactic and extragalactic sources is present in the X-ray catalog. In their paper, the authors describe the use of a naive Bayes classifier to assign membership probabilities to individual sources, based on source location, X-ray properties, and visual/infrared properties. For the particular membership decision rule adopted, 75% of CCCP sources are classified as members, 11% are classified as contaminants, and 14% remain unclassified. The resulting sample of stars likely to be Carina members is used in several other studies, which appear in the special issue of Astrophysical Journal Supplement (Volume 194, May 2011 Issue) which was devoted to the CCCP. This table was created by the HEASARC in June 2011 based on the electronic version of Table 5 from the reference paper which was obtained from the ApJS web site. In the input source table, the names were truncated by 3 characters from their complete version. The HEASARC corrected these names, and also obtained the Chandra source positions, using the electronic version of Table 2 from the companion paper (Broos et al. 2011, ApJS, 194, 2: available as the HEASARC Browse table CARINACXO), also obtained from the ApJS web site. This is a service provided by NASA HEASARC .

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