Extinction in the Star Cluster SAI 113 and Galactic Structure in Carina
| العنوان: | Extinction in the Star Cluster SAI 113 and Galactic Structure in Carina |
|---|---|
| المؤلفون: | David G. Turner, Giovanni Carraro, Daniel J. Majaess, Gustavo Baume, Roberto Claudio Gamen, José Alejo Molina Lera |
| المصدر: | CONICET Digital (CONICET) Consejo Nacional de Investigaciones Científicas y Técnicas instacron:CONICET SEDICI (UNLP) Universidad Nacional de La Plata instacron:UNLP |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Ciencias Astronómicas, Ciencias Físicas, INDIVIDUAL (SAI 113, VAN GENDEREN 1) [OPEN CLUSTERS AND ASSOCIATIONS], FOS: Physical sciences, Astrophysics, 01 natural sciences, Photometry (optics), purl.org/becyt/ford/1 [https], 0103 physical sciences, Cluster (physics), 010303 astronomy & astrophysics, Galaxy: structure, STRUCTURE [GALAXY], Physics, DUST, EXTINCTION, Spiral galaxy, 010308 nuclear & particles physics, DISTANCES [STARS], Astronomy and Astrophysics, purl.org/becyt/ford/1.3 [https], Galactic plane, HERTZSPRUNG-RUSSELL AND C-M DIAGRAMS, Astrophysics - Astrophysics of Galaxies, Astronomía, Stars, Star cluster, open clusters and associations: individual (SAI 113, van Genderen 1), Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), stars: distances, Hertzsprung-Russell and C-M diagrams, dust, extinction, Supergiant, CIENCIAS NATURALES Y EXACTAS, Open cluster |
| الوصف: | Photometric CCD {\it UBVI}$_C$ photometry obtained for 4860 stars surrounding the embedded southern cluster SAI~113 (Skiff~8) is used to examine the reddening in the field and derive the distance to the cluster and nearby van~Genderen~1. Spectroscopic color excesses for bright cluster stars, photometric reddenings for A3 dwarfs, and dereddening of cluster stars imply that the reddening and extinction laws match results derived for other young clusters in Carina: E$_{U-B}/$E$_{B-V} \simeq 0.64$ and $R_V \simeq 4$. SAI~113 displays features that may be linked to a history of dynamical interactions among member stars: possible circumstellar reddening and rapid rotation of late B-type members, ringlike features in star density, and a compact core with most stars distributed randomly across the field. The group van~Genderen~1 resembles a stellar asterism, with potential members distributed randomly across the field. Distances of $3.90 \pm0.19$ kpc and $2.49 \pm0.09$ kpc are derived for SAI~113 and van~Genderen~1, respectively, with variable reddenings E$_{B-V}$ ranging from 0.84 to 1.29 and 0.23 to 1.28. The SRC variables CK~Car and EV~Car may be outlying members of van~Genderen~1, thereby of use for calibrating the period-luminosity relation for pulsating M supergiants. More importantly, the anomalous reddening and extinction evident in Carina and nearby regions of the Galactic plane in the fourth quadrant impact the mapping of spiral structure from young open clusters. The distribution of spiral arms in the fourth quadrant may be significantly different from how it is often portrayed. 13 pages, 15 eps figure, in press in the Astronomical Journal |
| وصف الملف: | application/pdf |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b2ca149c121d61264f91bb76877aa37 http://sedici.unlp.edu.ar/handle/10915/87486 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....6b2ca149c121d61264f91bb76877aa37 |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |