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2061. Carina Nebula hot stars: stellar parameters and RVs
ID:
ivo://CDS.VizieR/J/AJ/155/190
Title:
Carina Nebula hot stars: stellar parameters and RVs
Short Name:
J/AJ/155/190
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Carina Nebula is an active star-forming region in the southern sky that is of particular interest due to the presence of a large number of massive stars in a wide array of evolutionary stages. Here, we present the results of the spectroscopic analysis of 82 B-type stars and 33 O-type stars that were observed in 2013 and 2014. For 82 B-type stars without line blending, we fit model spectra from the Tlusty BSTAR2006 grid to the observed profiles of H{gamma} and He {lambda}{lambda}4026, 4388, and 4471 to measure the effective temperatures, surface gravities, and projected rotational velocities. We also measure the masses, ages, radii, bolometric luminosities, and distances of these stars. From the radial velocities measured in our sample, we find 31 single lined spectroscopic binary candidates. We find a high dispersion of radial velocities among our sample stars, and we argue that the Carina Nebula stellar population has not yet relaxed and become virialized.
2062. Carina nebula optically identified YSOs
ID:
ivo://CDS.VizieR/J/A+A/567/A109
Title:
Carina nebula optically identified YSOs
Short Name:
J/A+A/567/A109
Date:
21 Oct 2021
Publisher:
CDS
Description:
The low obscuration and proximity of the Carina nebula make it an ideal place to study the ongoing star formation process and impact of massive stars on low-mass stars in their surroundings. To investigate this process, we have generated a new catalogue of the pre-main-sequence (PMS) stars in the Carina west (CrW) region and studied their nature and spatial distribution. We have also determined various parameters (reddening, reddening law, age, mass) which are further used to estimate the initial mass function (IMF) and K-band luminosity function (KLF) for the region under study. We obtained deep UBVRI H{alpha} photometric data of the field situated to the west of the main Carina nebula and centered around WR22. Medium-resolution optical spectroscopy of a subsample of X-ray selected objects along with archival data sets from Chandra, XMM-Newton and 2MASS surveys are used for the present study. Our spectroscopic results indicate that the majority of the X-ray sources are late spectral type stars. The region shows a large amount of differential reddening with minimum and maximum values of E(B-V) as 0.25 and 1.1mag, respectively. Our analysis reveals that the total to selective absorption ratio R_V_ is ~3.7+/-0.1 suggesting an abnormal grain size in the observed region. We identify 467 young stellar objects (YSOs) and study their characteristics. The ages and masses of the 241 optically identified YSOs range from ~0.1 to 10Myr and ~0.3 to 4.8M_{sun}_, respectively. However, the majority of them are younger than 1Myr and have masses below 2M_{sun}_. The high mass star WR22 does not seem to have contributed to the formation of YSOs in the CrW region. The initial mass function slope, Gamma in this region is found to be -1.13+/-0.20 in the mass range of 0.5<M/M_{sun}_<4.8. The K-band luminosity function slope ({alpha}) is also estimated as 0.31+/-0.01. We also performed minimum spanning tree analysis of the YSOs in this region which reveals that there are at least ten YSO cores associated with the molecular cloud and that leads to an average core radius and median branch length 0.43pc and 0.28pc, respectively.
2063. Carina OB1 Association XMM-Newton X-Ray Point Source Catalog
ID:
ivo://nasa.heasarc/carinaxmm
Title:
Carina OB1 Association XMM-Newton X-Ray Point Source Catalog
Short Name:
CARINAXMM
Date:
21 Feb 2025
Publisher:
NASA/GSFC HEASARC
Description:
This database table contains the Carina OB1 Association XMM-Newton X-Ray Point Source Catalog. The X-ray properties of the stellar population in the Carina OB1 Association have been examined with special emphasis on early-type stars. Their spectral characteristics provide some clues to understanding the nature of X-ray formation mechanisms in the winds of single and binary early-type stars. A timing and spectral analysis of five observations with XMM-Newton is performed using various statistical tests and thermal spectral models. 235 point sources have been detected within the field of view. Several of these sources are probably pre-main sequence stars with characteristic short-term variability. Seven sources are possible background AGNs. X-ray count rates in three energy bands and the X-ray variability status are given for 557 detections of the 235 point source. Cross-identifications of X-ray sources with optical and infrared catalogs are also presented. This table was created by the HEASARC in April 2008 based on &lt;a href="https://cdsarc.cds.unistra.fr/ftp/cats/J/A+A/477/593"&gt;CDS Catalog J/A+A/477/593&lt;/a&gt; files table2.dat and table3.dat. This is a service provided by NASA HEASARC .
2064. Carina OB stars in the CCCP catalog
ID:
ivo://CDS.VizieR/J/ApJS/194/5
Title:
Carina OB stars in the CCCP catalog
Short Name:
J/ApJS/194/5
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Chandra Carina Complex contains 200 known O- and B-type stars. The Chandra survey detected 68 of the 70 O stars and 61 of 127 known B0-B3 stars. We have assembled a publicly available optical/X-ray database to identify OB stars that depart from the canonical L_X/L_bol relation or whose average X-ray temperatures exceed 1keV. Among the single O stars with high kT we identify two candidate magnetically confined wind shock sources: Tr16-22, O8.5 V, and LS 1865, O8.5 V((f)). The O4 III(fc) star HD 93250 exhibits strong, hard, variable X-rays, suggesting that it may be a massive binary with a period of >30d. The visual O2 If* binary HD 93129A shows soft 0.6keV and hard 1.9keV emission components, suggesting embedded wind shocks close to the O2 If* Aa primary and colliding wind shocks between Aa and Ab. Of the 11 known O-type spectroscopic binaries, the long orbital-period systems HD 93343, HD 93403, and QZ Car have higher shock temperatures than short-period systems such as HD 93205 and FO 15. Although the X-rays from most B stars may be produced in the coronae of unseen, low-mass pre-main-sequence companions, a dozen B stars with high L_X_ cannot be explained by a distribution of unseen companions. One of these, SS73 24 in the Treasure Chest cluster, is a new candidate Herbig Be star.
2065. Carina project IX: UBVI data of Carina variables
ID:
ivo://CDS.VizieR/J/ApJ/814/71
Title:
Carina project IX: UBVI data of Carina variables
Short Name:
J/ApJ/814/71
Date:
21 Oct 2021
Publisher:
CDS
Description:
We present new multiband (UBVI) time-series data of helium burning variables in the Carina dwarf spheroidal galaxy. The current sample includes 92 RR Lyrae --six of them are new identifications-- and 20 Anomalous Cepheids, one of which is new identification. The analysis of the Bailey diagram shows that the luminosity amplitude of the first overtone component in double-mode variables is located along the long-period tail of regular first overtone variables, while the fundamental component is located along the short-period tail of regular fundamental variables. This evidence further supports the transitional nature of these objects. Moreover, the distribution of Carina double-mode variables in the Petersen diagram (P_1_/P_0_ versus P_0_) is similar to metal-poor globulars (M15, M68), to the dwarf spheroidal Draco, and to the Galactic Halo. This suggests that the Carina old stellar population is metal-poor and affected by a small spread in metallicity. We use trigonometric parallaxes for five field RR Lyrae stars to provide an independent estimate of the Carina distance using the observed reddening free Period-Wesenheit [PW,(BV)] relation. Theory and observations indicate that this diagnostic is independent of metallicity. We found a true distance modulus of {mu}=20.01+/-0.02 (standard error of the mean)+/-0.05 (standard deviation) mag. We also provided independent estimates of the Carina true distance modulus using four predicted PW relations (BV, BI, VI, BVI) and we found: {mu}=(20.08+/-0.007+/-0.07)mag, {mu}=(20.06+/-0.006+/-0.06)mag, {mu}=(20.07+/-0.008+/-0.08)mag, and {mu}=(20.06+/-0.006+/-0.06)mag. Finally, we identified more than 100 new SX Phoenicis stars that together with those already known in the literature (340) make Carina a fundamental laboratory for constraining the evolutionary and pulsation properties of these transitional variables.
2066. Carina Project VIII. {alpha}-element abundances
ID:
ivo://CDS.VizieR/J/A+A/580/A18
Title:
Carina Project VIII. {alpha}-element abundances
Short Name:
J/A+A/580/A18
Date:
21 Oct 2021
Publisher:
CDS
Description:
We have performed a new abundance analysis of Carina red giant (RG) stars from spectroscopic data collected with UVES (high spectral resolution) and FLAMES/GIRAFFE (high and medium resolution) at ESO/VLT. The former sample includes 44 RGs, while the latter consists of 65 (high-resolution) and ~800 (medium-resolution) RGs, covering a significant fraction of the galaxy's RG branch, and red clump stars. To improve the abundance analysis at the faint magnitude limit, the FLAMES/GIRAFFE data were divided into ten surface gravity and effective temperature bins. The spectra of the stars belonging to the same gravity and temperature bin were stacked. This approach allowed us to increase the signal-to-noise ratio in the faint magnitude limit (V>=20.5mag) by at least a factor of five. We took advantage of the new photometry index c_U,B,I_ introduced recently as an age and probably a metallicity indicator to split stars along the red giant branch. These two stellar populations display distinct [Fe/H] and [Mg/H] distributions: their mean iron abundances are -2.15+/-0.06dex ({sigma}=0.28), and -1.75+/-0.03dex ({sigma}=0.21), respectively. The two iron distributions differ at the 75% level. This supports preliminary results. Moreover, we found that the old and intermediate-age stellar populations have mean [Mg/H] abundances of -1.91+/-0.05dex ({sigma}=0.22) and -1.35+/-0.03dex ({sigma}=0.22); these differ at the 83% level. Carina's - element abundances agree, within 1{sigma}, with similar abundances for field halo stars and for cluster (Galactic and Magellanic) stars. The same outcome applies to nearby dwarf spheroidals and ultra-faint dwarf galaxies in the iron range covered by Carina stars. Finally, we found evidence of a clear correlation between Na and O abundances, thus suggesting that Carina's chemical enrichment history is quite different from that in the globular clusters.
2067. Carina Spiral Feature ubvybeta photometry
ID:
ivo://CDS.VizieR/J/A+A/410/523
Title:
Carina Spiral Feature ubvybeta photometry
Short Name:
J/A+A/410/523
Date:
21 Oct 2021
Publisher:
CDS
Description:
A data-base collating all uvby{beta} photometry available at present for O-B9 stars brighter than 10th visual magnitude in the field of the Carina Spiral Feature is presented. The completeness and homogeneity of the data-base are discussed.
2068. CARLA J1103+3449 cluster datacube
ID:
ivo://CDS.VizieR/J/A+A/641/A22
Title:
CARLA J1103+3449 cluster datacube
Short Name:
J/A+A/641/A22
Date:
21 Oct 2021
Publisher:
CDS
Description:
Passive early-type galaxies dominate cluster cores at z<~1.5. At higher redshift, cluster core galaxies are observed to have on-going star-formation, which is fuelled by cold molecular gas.We measured the molecular gas reservoir of the central region around the radioloud active galactic nucleus (AGN) in the cluster CARLA J1103+3449 at z=1.44 using NOEMA. The AGN synchrotron emission dominates the continuum emission at 94.48GHz, and we measured its flux at the AGN position and at the position of two radio jets. Combining our measurements with published results over the range 4.71GHz-94.5GHz, and assuming S_synch_{prop.to}{nu}^-{alpha}^, we obtain a flat spectral index of = 0:14 0:03 for the AGN core emission, and a steeper index of {alpha}=1.43+/-0.04 and {alpha}=1.15+/-0.04 at positions close to the western and eastern lobes, respectively. The total spectral index is {alpha}=0.92+/-0.02 over the range 73.8MHz-94.5GHz.We detect two CO(2-1) emission lines, both blueshifted with respect to the AGN. Their emission corresponds to two regions, 17kpc southeast and 14kpc southwest of the AGN, not associated with galaxies. In these two regions, we find a total massive molecular gas reservoir of M^tot^_gas_=3.9+/-0.4x10^10^M_{sun}_, which dominates (>~60%) the central total molecular gas reservoir. These results can be explained by massive cool gas flows in the center of the cluster. The AGN early-type host is not yet quenched; its star formation rate is consistent with being on the main sequence of star-forming galaxies in the field (star formation rate ~30-140M_[sun}_/yr), and the cluster core molecular gas reservoir is expected to feed the AGN and the host star formation before quiescence. The other confirmed cluster members show star formation rates at 2 below the field main sequence at similar redshifts and do not have molecular gas masses larger than galaxies of similar stellar mass in the field.
2069. Carlsberg Meridian Catalog 14 (CMC14)
ID:
ivo://CDS.VizieR/I/304
Title:
Carlsberg Meridian Catalog 14 (CMC14)
Short Name:
I/304
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Carlsberg Meridian Telescope (formerly the Carlsberg Automatic Meridian Circle) is dedicated to carrying out high-precision optical astrometry. It underwent a major upgrade in March 1999, with the installation of a 2kx2k CCD camera was installed with a Sloan r' filter operating in a drift scan mode. With the new system, the magnitude limit is 17 (r'mag) and the positional accuracy is in the range 35 to 100 mas. The resulting survey is aimed to provide an astrometric and photometric catalogue in the declination range -30 to +50 degrees. This catalogue is the result of all the observations made between March 1999 and October 2005 in the declination band -30 to +50 -- minus a gap between 5h30m and 10h30m for declinations south of -15. It contains 95,858,475 stars, plus 8,046,291 in the rejected files. Further information can be found in the documentation (cmc14doc.pdf) or at the web site http://www.ast.cam.ac.uk/~dwe/SRF/camc.html . It supersedes the previous versions (Cat. I/282) A dedicated remote query program (findcmc14) can be downloaded from http://cdsweb.u-strasbg.fr/doc/cdsclient.html
2070. Carlsberg Meridian Catalog 15 (CMC15)
ID:
ivo://CDS.VizieR/I/327
Title:
Carlsberg Meridian Catalog 15 (CMC15)
Short Name:
I/327
Date:
21 Oct 2021
Publisher:
CDS
Description:
The Carlsberg Meridian Telescope (formerly the Carlsberg Automatic Meridian Circle) is dedicated to carrying out high-precision optical astrometry. It underwent a major upgrade in March 1999, with the installation of a 2kx2k CCD camera was installed with a Sloan r' filter operating in a drift scan mode. With the new system, the magnitude limit is 17 (r'mag) and the positional accuracy is in the range 35 to 100 mas. The resulting survey is aimed to provide an astrometric and photometric catalogue in the declination range -40 to +50 degrees. This catalogue is the result of all the observations made between March 1999 and March 2011 in the declination band -40 to +50 degrees. Further information can be found in the documentation at the web site http://svo2.cab.inta-csic.es/vocats/cmc15/

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