The APOGEE-2 Survey of the Orion Star-forming Complex. I. Target Selection and Validation with Early Observations
| العنوان: | The APOGEE-2 Survey of the Orion Star-forming Complex. I. Target Selection and Validation with Early Observations |
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| المؤلفون: | J'Neil Cottle, J. Serena Kim, Nicola Da Rio, Carlos Román-Zúñiga, Matthew Shetrone, Gail Zasowski, Peter M. Frinchaboy, Keivan G. Stassun, Edward F. Schlafly, Kaike Pan, Eric D. Feigelson, Marina Kounkel, J. Borissova, David L. Nidever, Kevin R. Covey, Eugene A. Magnier, Christian Nitschelm, Jason E. Ybarra, K. C. Chambers, Alexandre Roman-Lopes, Juan José Downes, Nathan De Lee, Steven R. Majewski, Jeff A. Valenti, Genaro Suárez, Konstantin V. Getman, Jesús Hernández, Ronald E. Mennickent, Guy S. Stringfellow |
| المصدر: | The Astrophysical Journal Supplement Series. 236:27 |
| بيانات النشر: | American Astronomical Society, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Physics, 010504 meteorology & atmospheric sciences, FOS: Physical sciences, Library science, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, 01 natural sciences, Astrophysics - Solar and Stellar Astrophysics, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), 0103 physical sciences, Christian ministry, 010303 astronomy & astrophysics, Solar and Stellar Astrophysics (astro-ph.SR), 0105 earth and related environmental sciences |
| الوصف: | The Orion Star Forming Complex (OSFC) is a central target for the APOGEE-2 Young Cluster Survey. Existing membership catalogs span limited portions of the OSFC, reflecting the difficulty of selecting targets homogeneously across this extended, highly structured region. We have used data from wide field photometric surveys to produce a less biased parent sample of young stellar objects (YSOs) with infrared (IR) excesses indicative of warm circumstellar material or photometric variability at optical wavelengths across the full 420 square degrees extent of the OSFC. When restricted to YSO candidates with H < 12.4, to ensure S/N ~100 for a six visit source, this uniformly selected sample includes 1307 IR excess sources selected using criteria vetted by Koenig & Liesawitz and 990 optical variables identified in the Pan-STARRS1 3$��$ survey: 319 sources exhibit both optical variability and evidence of circumstellar disks through IR excess. Objects from this uniformly selected sample received the highest priority for targeting, but required fewer than half of the fibers on each APOGEE-2 plate. We fill the remaining fibers with previously confirmed and new color-magnitude selected candidate OSFC members. Radial velocity measurements from APOGEE-1 and new APOGEE-2 observations taken in the survey's first year indicate that ~90% of the uniformly selected targets have radial velocities consistent with Orion membership.The APOGEE-2 Orion survey will include >1100 bona fide YSOs whose uniform selection function will provide a robust sample for comparative analyses of the stellar populations and properties across all sub-regions of Orion. Accepted for publication in ApJS |
| تدمد: | 1538-4365 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7714b5950143c4de60741d35e8e8fb7c https://doi.org/10.3847/1538-4365/aabada |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....7714b5950143c4de60741d35e8e8fb7c |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15384365 |
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