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RR Lyrae Stars for SIM

RR Lyrae Stars for SIM. I. A- and B-Lists II. Obtaining Apparent Mags: (a) Field and (b) Cluster. A- & B-Lists. A-List (60 RRL) B-List (42 RRL) C-List (37 RRL) x Seek low E(B-V) [Fe/H] extremes: [Fe/H] > -0.6 [Fe/H] < -2.0 Disk/halo: [Fe/H] ~ -1.0 OoI/II: [Fe/H] > -1.6

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RR Lyrae Stars for SIM

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  1. RR Lyrae Stars for SIM I. A- and B-Lists II. Obtaining Apparent Mags: (a) Field and (b) Cluster

  2. A- & B-Lists • A-List (60 RRL) • B-List (42 RRL) • C-List (37 RRL) x • Seek low E(B-V) • [Fe/H] extremes: • [Fe/H] > -0.6 • [Fe/H] < -2.0 • Disk/halo: • [Fe/H] ~ -1.0 • OoI/II: • [Fe/H] > -1.6 • Still evolving…

  3. BVIK light curves of Field RRL (1) North (Dec > -20°): • 2000-2004: • Obtaining VI with BGSU 0.5m+CCD • Completed most stars w/ 13h < RA < 24h (~50 stars) • Dome motor failed Aug • Oct: WIYN 0.9m calibrated 24 more fields • Total now 49 • Secure: 3+ visits on 2+ different nights • 2005: • Continue BGSU observations • 1-2 more WIYN 0.9m calibration runs

  4. BGSU 0.5m+CCD

  5. BVIK light curves of Field RRL (2) South (Dec < -10°): • 2004: • Obtaining IK with SMARTS 1.3m + AndiCam (queue) • Completed 37 stars w/ 10h < RA < 24h • Expect ~9 more • Summer: • Worked out I calibration scheme & tested • Processed & photometered 2004A K data • 2005: • Calibrate I data; plot light curves • Process & photometer K data; plot LCs • Write paper • mean mags & color detection of companions

  6. SMARTS 1.3m+AndiCam

  7. Question: • How will we: • Title our papers? • E.g., “Anchoring the Population II Distance Scale with SIM. IV. Light Curves of Field RR Lyrae Variables.” • Assign Author List? • MACHO model? • Contributors only? • Contributors in order of contribution, non-contributors last?

  8. BVIK light curves of Field RRL (3) Literature: • 2004: • Students typed in UBV(I) data for 24 stars: • Sturch (1966) • Fitch, Wisniewski, & Johnson (1966) • Look for systematic offsets • Combine to obtain better phase coverage • 2005: • Continue … (all 120+ stars) • Check for systematic offsets with our data

  9. BVIK LCs of Cluster RRL • 2004: • Students photometer RRL in 2 clusters: • NGC 104: I, 1 RRL • NGC 362: BVI, 7+ RRL • Calibrating to Stetson secondary standards. • 2005: • Acquire more BVI on both (CTIO 0.9m) • Publish 2 papers: • mean mags & color detection of companions • Begin work on existing images of w Cen • Apply for 1.3m+AndiCam: BVIK of M30

  10. Summary • 2004: • VI photom of Northern field RRL • IK photom of 40-50 Southern field RRL • Literature UBVI data acquisition for field RRL • BVI photom of RRL in NGC 104 & NGC 362 • 2005: • Continue 1-4 above • Publish 3 papers (2, 2x4) • Begin photom of RRL in w Cen • Apply for SMARTS 1.3m time: M30 RRL

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