WOCS Variability: Monitoring NGC6939 S. Kafka (IUB) D. Gibbs II (Univ. of Wyoming) A. Henden (US Naval Obs.) R.K.Honeycutt (IUB) S. Kafka (IUB) D. Gibbs.

Slides:

Advertisements

Similar presentations

LesvePhotometry an automatic photometry solution

Advertisements

Mid-Infrared Variability and Mass Accretion Toward NGC2264 Protostars Susan Terebey CSULA Dept of Physics & Astronomy Ann Marie Cody, Luisa M. Rebull,

Chelsea Braun Credit: Artist illustration ESO, content/uploads/2006/12/ supernova.jpg.

ASTR Fall Semester Joel E. Tohline, Alumni Professor Office: 247 Nicholson Hall [Slides from Lecture17]

EF Eri: Onset of Chromospheric Activity in the Sub-Stellar Secondary

Astronomical Distances or Measuring the Universe The Problems by Rastorguev Alexey, professor of the Moscow State University and Sternberg Astronomical.

Multicolour photometry of unusual dwarf nova star HS Golysheva P., Shugarov, S., Katysheva N., Chochol D. Sternberg Astronomical Institute, Moscow.

Photometric Techniques I Preliminary reductions and calibrations Sergio Ortolani Dipartimento di Astronomia Universita’ di Padova,Italy.

ECLIPSING BINARIES IN OPEN CLUSTERS John Southworth Dr Pierre Maxted Dr Barry Smalley Astrophysics Group Keele University.

ECLIPSING BINARIES IN OPEN CLUSTERS John Southworth Dr Pierre Maxted Dr Barry Smalley Astrophysics Group Keele University.

Open Clusters and Galactic Disk Observations with LAMOST Li CHEN, Jinliang HOU Shanghai Astronomical Observatory, CAS KIAA/PKU-IoA Workshop.

Variable Stars in the Globular Cluster NGC 6496 Katherine Guldenschuh & Andrew Layden (Bowling Green State University) Douglas Welch (McMaster University),

RR Lyrae Stars as a Tool to Measure Interstellar Reddening Andrew Layden, Brad Boswell, et al. Bowling Green State University Variable Stars 2004, BGSU,

RR Lyrae Observations M B,V,I,K = m B,V,I,K - 5 log d + 5 To calibrate M B,V,I,K we need: To calibrate M B,V,I,K we need: BVIK light curves for field RRL.

J.S. Clark 1, I. Negueruela 2, P.A. Crowther 3, S. Goodwin 4 and L. J. Hadfield 3 1 University College London, 2 Universidad de Alicante, 3 University.

Two New Close Binary Central Stars of Planetary Nebulae from a Critically Selected Southern Hemisphere Sample Todd C. Hillwig (Georgia State University)

The Complex Star Formation History of NGC 1569 L. Angeretti 1, M. Tosi 2, L. Greggio 3, E. Sabbi 1, A. Aloisi 4, C. Leitherer 4 The object The observations.

Presented by Anna Hourihane Searching for Dwarf Novae in Globular Clusters Anna Hourihane a, Paul Callanan a and Adrienne Cool b a Department of Physics,

RR Lyrae Stars for SIM I. Making the B-List II. Obtaining Apparent Mags: (a) Field and (b) Cluster.

Compilation of stellar fundamental parameters from literature : high quality observations + primary methods Calibration stars for astrophysical parametrization.

 a & Broadband photometry of open clusters Martin Netopil Institute of Astronomy, University of Vienna - Austria AIPW Dubrovnik.

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

Undergraduate Research Experiences at BGSU Presented by Katie Guldenschuh & Andy Layden BRAVO BG! Orlando Florida February 2005.

Undergraduate Research Experiences at BGSU Presented by Katie Guldenschuh & Andy Layden BRAVO BG! Orlando Florida February 2005.

ASTR377: A six week marathon through the firmament by Orsola De Marco Office: E7A 316 Phone: Week 6, May 24-27, 2009.

Space motion and Stellar content of GCs with GeMS Giuliana Fiorentino University of Bologna PI: A. McConnachie, CoI: P.B. Stetson, P. Turri, D. Anderson(NRC,

JRS-1 StromFest Westward Look Resort April 4-5, 2008 Empirical Studies of Star Formation: “Below Main Sequence” Stars, Age Spreads and Photometric Variability.

A New Technique to Measure ΔY/ΔZ A. A. R. Valcarce (UFRN) Main collaborators: J. R. de Medeiros (UFRN)M. Catelan (PUC) XXXVII SAB meeting Águas de Lindóia,

Lecture 10 Metalicity Evolution Simple models for Z(  ( t ) ) (Closed Box, Accreting Box, Leaky Box) Z = - y ln(  ) = y ln( 1 /  ) “G dwarf problem”

The Effect of Crowding on the GSMT Stellar Populations Science Case Knut Olsen, Bob Blum (NOAO), François Rigaut (Gemini) GSMT SWG Presentation Hilo 2002.

SSS in young stellar populations: progenitors of the “prompt” Sne Ia? Thomas Nelson NASA Goddard Space Flight Center University of Maryland – Baltimore.

Photometry and Astrometry of SIM Planetquest Globular Cluster Targets T. M. Girard (Yale), A. Sarajedini (U. Florida), B. Chaboyer (Dartmouth) Table 1.

The Chinese SONG proposal: scientific concerns Jianning Fu (Beijing Normal University) and Chinese SONG team Beijing ─ March 29, 2010 The third workshop.

Red Clump Distance Measurements Andrew Lipnicky Astronomy Observational Techniques and Instrumentation May 9, 2013.

Stellar Populations Science Knut Olsen. The Star Formation Histories of Disk Galaxies Context – Hierarchical structure formation does an excellent job.

The White Dwarf in SS Cygni: FUSE + HST Spectral Analysis Edward M. Sion, Patrick Godon, Janine Myszka Edward M. Sion, Patrick Godon, Janine Myszka Department.

C R I M E A Activity of five WZ Sge- type systems in a few years after their outbrsts E.P. Pavlenko, O.I. Antoniuk, K.A. Antoniuk, D.A. Samsonov, A.V.

18-19 Settembre 2006 Dottorato in Astronomia Università di Bologna.

New Close Binary Systems (WD + MS) from SDSS (DR 5) And the Search for Magnetic White Dwarfs in Cataclysmic Variable Progenitor Systems Nicole Silvestri.

Binary millisecond X-ray pulsars Department of Physics University College Cork Paul Callanan and Mark Reynolds Alexei Filippenko, Department of Astronomy,

Goal: To understand binary stars Objectives: 1)To review why we get binary star systems 2)To learn about the 2 different binary star types and how we find.

SNLS-03D3bb Andy Howell University of Toronto and the Supernova Legacy Survey (SNLS)

Detection of the photometric period of the classical nova V2468 Cygni. D. Chochol 1, S.Y. Shugarov 1,2, I.M. Volkov 2, V.P. Goranskij 3 1) Astronomical.

The Photometric Study of New SU UMA Dwarf Nova SDSS J16 h 25 m 20 s +12 o 03’08”. The Scargle-Lomb periodogram determined by observations at superoutburst.

Supernova study with BATC Sky Survey Wang Xiao-feng Physics Department and Tsinghua Center for Astrophysics, Tsinghua University 2005, 8, 12, Weihai.

Globular clusters in the galactic plane Václav Glos Star clusters.

A Photometric Study of Unstudied Open Clusters Berkeley 49 & 84 in the SDSS Jinhyuk Ryu and Myung Gyoon Lee Department of Physics & Astronomy, Seoul National.

Peculiar Helium Nova V445 Puppis Vitaly Goranskij, Sternberg Astronomical Institute, Moscow University, Russia also participated or presented their observations.

New and Odds on Globular Cluster Stellar Populations: an Observational Point of View (The Snapshot Database) G.Piotto, I. King, S. Djorgovski and G. Bono,

Cataclysmic Variables: A Perfect Testbed for Variability Brokering Paula Szkody University of Washington Santa Barbara May 13, 2015.

The Giant Branches – Leiden 14/05/09 The Initial-Final Mass Relation Aldo Serenelli – MPA Salaris, Serenelli, Weiss & Miller Bertolami (2009)

CHARA Collaboration Year-Five Science Review Dynamite Diameters Tabetha Boyajian GSU/CHARA Presented by Hal McAlister.

The Photometric Properties of NGC 6134 and Hogg 19 SDSS u’g’r’i’z’ Open Cluster Survey: Credit: Credit: SMARTS consortium.

Discovery, Study, Classification and Modeling of Variable Stars Natalia A. Virnina Department of High and Applied Mathematics, Odessa National Maritime.

Descubrimiento, Estudio, Clasificación y Modelado de Estrellas Variables Department of High and Applied Mathematics, Odessa National Maritime University,

T Pyx IM Nor In tail of eruption (Woudt & Warner 2003) Patterson et al. (1998) Bradley E. Schaefer (Louisiana State University) COMPREHENSIVE PHOTOMETRIC.

Observational Windows on the Dynamics of Open Clusters Robert D. Mathieu University of Wisconsin - Madison.

Age and distance for the unstudied open cluster Teutsch 7 In Sung Jang and Myung Gyoon Lee Department of Physics & Astronomy, Seoul National University.

EXPLORE/OC: Photometry Results for the Open Cluster NGC 2660 K. von Braun (Carnegie/DTM), B. L. Lee (Toronto), S. Seager (Carnegie/DTM), H. K. C. Yee (Toronto),

The nearby strongly reddened open cluster Stock2. A new study based on accurate proper motions and 2MASS photometry A. Spagna, F. Cossu, M.G. Lattanzi,

BATC Multi-color Photometry of Open Cluster M48 Zhenyu Wu 8.11, 2005, Weifang.

Time Domain Astrophysics Stephen Potter South African Astronomical Observatory.

Single versus Binary Star Progenitors of Type IIb Supernovae

A photometric method to classify high-z supernovae found with HSC

Figure 9 from The Sloan Digital Sky Survey-II: Photometry and Supernova IA Light Curves from the 2005 Data (Image 1 of 10) Jon A. Holtzman et al

Mariko KATO (Keio Univ., Japan) collaboration with

Dong-Hwan Cho1, 2, Hyun-Il Sung2, Sang-Gak Lee3, and Tae Seog Yoon1

Single Vs binary star progenitors of Type Iib Sne

The Link Between Underluminous Supernovae Explosions, Gravitational Waves and Extremely Low Mass White Dwarfs Alex Gianninas Mukremin Kilic, Warren Brown,

Predicted Light Curves and Spectra

Presentation transcript:

WOCS Variability: Monitoring NGC6939 S. Kafka (IUB) D. Gibbs II (Univ. of Wyoming) A. Henden (US Naval Obs.) R.K.Honeycutt (IUB) S. Kafka (IUB) D. Gibbs II (Univ. of Wyoming) A. Henden (US Naval Obs.) R.K.Honeycutt (IUB) BGSU, April 3, 2004

Age Reddening Metallicity Abundances Astrometric info Variability Age Reddening Metallicity Abundances Astrometric info Variability WIYN Open Cluster Study Establish a standard database of open clusters

Our motivation: Cataclysmic Variables Interacting binaries WD accretes H-rich material from its low- mass, Roche-lobe filling companion Unique natural laboratories for studying  Accretion Physics  Classical Novae  SNe Ia progenitors ?

Why Open Clusters? Bonus: age, distance, metallicity Not many CVs known in globular/open clusters Only 3 CVs known in all open clusters!

NGC 6939  Age = 1.6 ± 0.3 Gyr  0.29 < E(B-V) < 0.41  < m-M < (Rosvick & Balam 2002)  [Fe/H] = -0.14±0.13 (Friel et al 2002)  Variability study : 6 vars (Robb & Cardinal 1998) Credit: J. Burkle, D. Gibbs, D. Hoffmann, S. Kafka, WIYN 0.9m, IU REU 2003

Data TelescopeDates of Obs.(2003) Filter# obs WIYN 0.91m 31 March – 14 Sept R174 USNOFS 1.3m 07 April – 16 Jun R120 WIYN 0.91m 13 Jul BVI3 USNOFS 1m April/June BVRI16

NGC 6939 USNOFS 1.3m R- filter NGC 6939 WIYN 0.9m E N

StrengthsLimitations DAOPHOT/ APPhot ( Stetson, 1987 PASP, v 99, p ) Aperture/PSF photometry for every star in the image Not optimized for variability studies ASTROVAR (Honeycutt, R.K, 1992, PASP, 104, ) Incomplete ensemble photometry Error analysis & graphics tools Periodogram and light curve folding interface Requires magnitudes as input Data Reduction

CMD V R B-V V-R

Results R R R R Phase P=0.3548d P=0.4511d P=0.2419d P=0.2946d P=0.3601d P=0.2951d P= d P=0.3379d

Results R R Phase JD V B-V s33 s28 V467Cep V470CepV10 V466Cep V2 V7 V1, V8 V3 V4 V9 V6 V5 P=0.5668d P=1.143d P>95d

Oddities

NGC 6939 USNOFS 1.3m R- filter

µDeµDe µ RA V4 V9 s28 V470 Cep V8 NGC 6939 Oddities Glushkova & Rastorguev 1991 Monet et al (USNO-B)

Conclusions:

No CVs found in the cluster Cluster depleted of faint variables??? Future work: X-rays ? More data! More Clusters! Kafka et al, 2004, AJ, 127, 1622