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1. Full Text Fossil Merger of a Population II Star
by Fuhrmann, Klaus and Chini, Rolf
Astrophysical Journal, ISSN 0004-637X, 05/2018, Volume 858, Issue 2, p. 103
We report on a fossil stellar merger for the subgiant primary of the visual binary HR 3750. The subgiant leads to an age T similar or equal to 3.2 Gyr for a... 
stars: fundamental parameters | blue stragglers | stars: individual (HR 3750) | stars: Population II | stars: solar-type | COOL DWARF STARS | NEARBY STARS | ELEMENTS | ASTRONOMY & ASTROPHYSICS | ORBITS | CHROMOSPHERIC VARIATIONS | HALO
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2. Full Text The Masses of Population II White Dwarfs
by Kalirai, Jason S and Davis, D. Saul and Richer, Harvey B and Bergeron, P and Catelan, Marcio and Hansen, Brad M. S and Michael Rich, R
The Astrophysical Journal, ISSN 0004-637X, 11/2009, Volume 705, Issue 1, pp. 408 - 425
Globular star clusters are among the first stellar populations to have formed in the Milky Way, and thus only a small sliver of their initial spectrum of... 
Stars: evolution | Stars: mass loss | Globular clusters: individual (M4) | Techniques: spectroscopic | White dwarfs | COLOR-MAGNITUDE DIAGRAMS | EVOLUTIONARY TRACKS | stars: evolution | HUBBLE-SPACE-TELESCOPE | DEEP ADVANCED CAMERA | globular clusters: individual (M4) | LUMINOSITY FUNCTION | GLOBULAR-CLUSTER NGC-6397 | white dwarfs | STELLAR EVOLUTION | OMEGA-CENTAURI | techniques: spectroscopic | ASTRONOMY & ASTROPHYSICS | GIANT BRANCH | COOLING SEQUENCE | stars: mass loss | TELESCOPES | MAIN SEQUENCE STARS | INFORMATION | NONMETALS | STAR CLUSTERS | DIAGRAMS | HYDROGEN | ELEMENTS | EVOLUTION | ASTROPHYSICS, COSMOLOGY AND ASTRONOMY | COOLING | STAR EVOLUTION | MASS | WHITE DWARF STARS | STARS | HERTZSPRUNG-RUSSELL DIAGRAM | MILKY WAY | GALAXIES | DWARF STARS
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3. Full Text The primordial binary population. II.. Recovering the binary population for intermediate mass stars in Scorpius OB2
by Kouwenhoven, M.B.N and Brown, A.G.A and Portegies Zwart, S.F and Kaper, L
Astronomy & Astrophysics, ISSN 0004-6361, 2007, Volume 474, Issue 1, pp. 77 - 104
We characterize the binary population in the young and nearby OB association Scorpius OB2 (Sco OB2) using available observations of visual, spectroscopic, and... 
Galaxy: open clusters and associations: individual: Scorpius OB2 | Stars: binaries: general stars: formation | Stars: binaries: visual | ICCD SPECKLE OBSERVATIONS | SCORPIO-CENTAURUS ASSOCIATION | stars : binaries : general stars | formation | galaxy : open clusters and associations : individual : Scorpius OB2 | BROWN DWARFS | stars : binaries : visual | ORION NEBULA CLUSTER | SOLAR NEIGHBORHOOD | ASTRONOMY & ASTROPHYSICS | S/N ECHELLE SPECTROSCOPY | LINED SPECTROSCOPIC BINARIES | YOUNG STELLAR GROUPS | MULTIPLE STARS | OB ASSOCIATION
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4. Full Text The transition from population III to population II-I star formation
by Maio, Umberto and Ciardi, Benedetta and Dolag, Klaus and Tornatore, Luca and Khochfar, Sadegh
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 2010, Volume 407, Issue 2, pp. 1003 - 1015
We present results from the first cosmological simulations which study the onset of primordial, metal-free (population III), cosmic star formation and the... 
large‐scale structure of Universe | early Universe | dark ages, reionization, first stars | cosmology: theory | Cosmology: theory | Early Universe | Large-scale structure of Universe | Dark ages, reionization, first stars | reionization | dark ages | first stars | large-scale structure of Universe | 1ST STARS | CHEMICAL ENRICHMENT | SMOOTHED PARTICLE HYDRODYNAMICS | DUST FORMATION | COSMOLOGICAL SIMULATIONS | EXTREMELY METAL-POOR | ASTRONOMY & ASTROPHYSICS | GALAXY FORMATION | INTERMEDIATE-MASS STARS | ASTROPHYSICAL PLASMAS | Universe | Cosmology | Computer simulation | Star & galaxy formation | Stars & galaxies | Physics - Cosmology and Nongalactic Astrophysics
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5. Full Text The first Population II stars formed in externally enriched mini-haloes
by Smith, Britton D and Wise, John H and O'Shea, Brian W and Norman, Michael L and Khochfar, Sadegh
Monthly Notices of the Royal Astronomical Society, ISSN 0035-8711, 10/2015, Volume 452, Issue 3, pp. 2822 - 2836
We present a simulation of the formation of the earliest Population II stars, starting from cosmological initial conditions and ending when metals created in... 
Galaxies: star formation | Hydrodynamics | Radiative transfer | Methods: numerical | radiative transfer | galaxies: star formation | ADAPTIVE MESH REFINEMENT | SUPERNOVA EXPLOSIONS | hydrodynamics | PRIMORDIAL STAR | methods: numerical | LOW-METALLICITY | COSMOLOGICAL SIMULATIONS | LAMBDA-CDM UNIVERSE | FORMING CLOUDS | ASTRONOMY & ASTROPHYSICS | STELLAR POPULATIONS | NUMERICAL COSMOLOGY | INITIAL MASS FUNCTION
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6. Full Text A massive, quiescent, population II galaxy at a redshift of 2.1
by Kriek, Mariska and Conroy, Charlie and Van Dokkum, Pieter G and Shapley, Alice E and Choi, Jieun and Reddy, Naveen A and Siana, Brian and Van De Voort, Freeke and Coil, Alison L and Mobasher, Bahram
Nature, ISSN 0028-0836, 12/2016, Volume 540, Issue 7632, pp. 248 - 251
Unlike spiral galaxies such as the Milky Way, the majority of the stars in massive elliptical galaxies were formed in a short period early in the history of... 
EVOLUTION | UNCERTAINTIES | MODELS | ABSORPTION-LINE SPECTROSCOPY | IA SUPERNOVAE | MULTIDISCIPLINARY SCIENCES | GROWTH | ELEMENT ABUNDANCE RATIOS | STELLAR POPULATIONS | METALLICITY | PROPAGATION | Elliptical galaxies | Star formation | Observations | Universe | Red shift | Supernovae | Star & galaxy formation | Stars & galaxies
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7. Full Text Chemical abundances in LMC stellar populations: II. the bar sample
by Van Der Swaelmen, M and Hill, V and Primas, F and Cole, A.A
Astronomy and Astrophysics, ISSN 0004-6361, 2013, Volume 560, pp. A44 - np
Aims. This paper compares the chemical evolution of the Large Magellanic Cloud (LMC) to that of the Milky Way (MW) and investigates the relation between the... 
Galaxies: evolution | Stars: abundances | Galaxies: abundances | Magellanic Clouds | galaxies: evolution | S-PROCESS | METAL-POOR STARS | GRAVITATIONAL LENSING EXPERIMENT | stars: abundances | RR LYRAE STARS | NEUTRON-CAPTURE ELEMENTS | ASTRONOMY & ASTROPHYSICS | AGE-METALLICITY RELATION | HIGH-RESOLUTION | galaxies: abundances | LARGE-MAGELLANIC-CLOUD | EFFECTIVE TEMPERATURE SCALE | GIANT BRANCH STARS | Enrichment | Discs | Magellanic clouds | Star formation | Disks | Formations | Astronomy | Massive stars | Physics - Astrophysics of Galaxies
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8. Full Text THE CARNEGIE-CHICAGO HUBBLE PROGRAM. I. AN INDEPENDENT APPROACH to the EXTRAGALACTIC DISTANCE SCALE USING only POPULATION II DISTANCE INDICATORS
by Beaton, Rachael L and Freedman, Wendy L and Madore, Barry F and Bono, Giuseppe and Carlson, Erika K and Clementini, Gisella and Durbin, Meredith J and Garofalo, Alessia and Hatt, Dylan and Jang, In Sung and Kollmeier, Juna A and Lee, Myung Gyoon and Monson, Andrew J and Rich, Jeffrey A and Scowcroft, Victoria and Seibert, Mark and Sturch, Laura and Yang, Soung-Chul
Astrophysical Journal, ISSN 0004-637X, 12/2016, Volume 832, Issue 2, p. 210
We present an overview of the Carnegie-Chicago Hubble Program, an ongoing program to obtain a 3% measurement of the Hubble constant (H-0) using alternative... 
stars: variables: RR Lyrae | stars: Population II | distance scale | cosmological parameters | BAADE-WESSELINK METHOD | RED GIANT BRANCH | PERIOD-LUMINOSITY RELATION | PROBE WMAP OBSERVATIONS | M31S STELLAR HALO | SPACE-TELESCOPE | SUPERNOVA PROJECT | ASTRONOMY & ASTROPHYSICS | LARGE-MAGELLANIC-CLOUD | RR-LYRAE STARS | CLUSTER OMEGA-CENTAURI
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9. Full Text Where is Population II?
by Mould, J and Bianchini, F and Forbes, Duncan A and Reichardt, C.L
Publications of the Astronomical Society of Australia, ISSN 1323-3580, 03/2018, Volume 35
The use of roman numerals for stellar populations represents a classification approach to galaxy formation which is now well behind us. Nevertheless, the... 
(cosmology:) dark ages, reionization, first stars – (cosmology:) cosmic background radiation – (Galaxy:) globular clusters: general | (cosmology:)cosmic background radiation | AGES | EXTRAGALACTIC GLOBULAR-CLUSTERS | (Galaxy:) globular cluster: general | (cosmology:) dark ages, reionization, first stars | ASTRONOMY & ASTROPHYSICS | Physics - Cosmology and Nongalactic Astrophysics
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10. Full Text Population II stars and the Spite plateau: Stellar evolution models with mass loss â
by Vick, M and Michaud, G and Richer, J and Richard, O
Astronomy and Astrophysics, ISSN 0004-6361, 2013, Volume 552, pp. A131 - np
Aims. We aim to determine the constraints that observed chemical abundances put on the potential role of mass loss in metal poor dwarfs. Methods.... 
Stars: interiors | Stars: abundances | Stars: Population II | Stars: mass-loss | Diffusion | HALO-STARS | diffusion | ATOMIC DIFFUSION | stars: interiors | HORIZONTAL-BRANCH | RADIATIVE ACCELERATION CALCULATIONS | LITHIUM ABUNDANCES | METAL-POOR STARS | ABUNDANCE ANOMALIES | stars: abundances | CLUSTER NGC 6397 | BIG-BANG NUCLEOSYNTHESIS | stars: Population II | ASTRONOMY & ASTROPHYSICS | stars: mass-loss | PRIMORDIAL NUCLEOSYNTHESIS | Turbulence | Turbulent flow | Computational fluid dynamics | Metallicity | Astronomical models | Fluid flow | Lithium | Mathematical models | Physics - Solar and Stellar Astrophysics | Physics | Astrophysics
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11. Full Text KSP-OT-201611a: A Distant Population II Dwarf Nova Candidate Discovered by the KMTNet Supernova Program
by Lee, Y and Moon, DS and Kim, SC and Park, HS and Cha, SM
ASTROPHYSICAL JOURNAL, ISSN 0004-637X, 08/2019, Volume 880, Issue 2, p. 109
We present a multicolor, high-cadence photometric study of a distant dwarf nova KSP-OT-201611a discovered by the Korea Microlensing Telescope Network Supernova... 
ABSOLUTE MAGNITUDES | stars: dwarf novae | techniques: photometric | ASTRONOMY & ASTROPHYSICS | PERIOD | BINARIES | surveys | SUPEROUTBURST | SUPERHUMPS | MODEL | CATACLYSMIC VARIABLES | OUTBURST
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12. Full Text Benchmark stars for Gaia Fundamental properties of the Population II star HD 140283 from interferometric, spectroscopic, and photometric data
by Creevey, OL and Thevenin, F and Berio, P and Heiter, U and von Braun, K and Mourard, D and Bigot, L and Boyajian, TS and Kervella, P and Morel, P and Pichon, B and Chiavassa, A and Nardetto, N and Perraut, K and Meilland, A and Mc Alister, HA and ten Brummelaar, TA and Farrington, C and Sturmann, J and Sturmann, L and Turner, N and Institutionen för fysik och astronomi and Teknisk-naturvetenskapliga vetenskapsområdet and Observationell astrofysik and Uppsala universitet and Fysiska sektionen
ASTRONOMY & ASTROPHYSICS, ISSN 1432-0746, 03/2015, Volume 575
Metal-poor halo stars are important astrophysical laboratories that allow us to unravel details about many aspects of astrophysics, including the chemical... 
stars: individual: HD 140283 | MAIN-SEQUENCE STARS | surveys | METAL-POOR STARS | COOL STARS | EFFECTIVE TEMPERATURES | stars: Population II | STELLAR EVOLUTION CALCULATIONS | ASTROPHYSICAL PARAMETERS | techniques: spectroscopic | ASTRONOMY & ASTROPHYSICS | MODEL ATMOSPHERES | stars: fundamental parameters | SOLAR-LIKE OSCILLATIONS | BOLOMETRIC CORRECTIONS | BASE-LINE INTERFEROMETRY | techniques: interferometric | Astrophysics | Redundancy | Stars | Benchmarking | Arrays | Photometry | Interferometers | Interferometry | Fysik | Physical Sciences | Astronomi, astrofysik och kosmologi | Naturvetenskap | Natural Sciences | Astronomy, Astrophysics and Cosmology
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13. Full Text Galactic bulge population II Cepheids in the VVV survey: Period-luminosity relations and a distance to the Galactic centre
by Bhardwaj, A and Rejkuba, M and Minniti, D and Surot, F and Valenti, E and Zoccali, M and Gonzalez, O.A and Romaniello, M and Kanbur, S.M and Singh, H.P
Astronomy and Astrophysics, ISSN 0004-6361, 09/2017, Volume 605, p. A100
Context. Multiple stellar populations of different ages and metallicities reside in the Galactic bulge that trace its structure and provide clues to its... 
Galaxy: bulge | Galaxies: Magellanic Clouds | Galaxy: structure | Stars: variables: Cepheids | Distance scale | OGLE-III | GRAVITATIONAL LENSING EXPERIMENT | stars: variables: Cepheids | distance scale | K-S BANDS | RED CLUMP STARS | PROPER MOTIONS | galaxies: Magellanic Clouds | ASTRONOMY & ASTROPHYSICS | INTERSTELLAR EXTINCTION LAW | LARGE-MAGELLANIC-CLOUD | MILKY-WAY | RR-LYRAE STARS | GLOBULAR-CLUSTERS | Gravitational lenses | Identification methods | Hubble Space Telescope | Extinction | Metals | Biological evolution | Luminosity | Space telescopes | Near-infrared observations | Population statistics | Stellar populations | Magellanic clouds | Spatial distribution | Galactic bulge | Population | Evolution | Cepheid variables | Stellar age | Photometry | Gamma ray astronomy | Tracers
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