THE IDENTIFICATION OF RR LYRAE AND δ SCUTTI STARS FROM VARIABLE<i>GALAXY EVOLUTION EXPLORER</i>ULTRAVIOLET SOURCES

Kinman, T. D.; Brown, Warren R.

doi:10.1088/0004-6256/148/6/121

Cited by 17 publications

(13 citation statements)

References 55 publications

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“…Finally, we note that RR Lyrae stars can have NUV−FUV colours of between ∼3−5 (Kinman & Brown 2014), which places them within our cut. Generally, most RR Lyrae stars are too faint to make it into our sample.…”

Section: Sources Of Contaminationmentioning

confidence: 64%

The white dwarf binary pathways survey – I. A sample of FGK stars with white dwarf companions

Parsons

Rebassa‐Mansergas

Schreiber

et al. 2016

Mon. Not. R. Astron. Soc.

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The number of spatially unresolved white dwarf plus main-sequence star binaries has increased rapidly in the last decade, jumping from only ∼30 in 2003 to over 3000. However, in the majority of known systems the companion to the white dwarf is a low-mass M dwarf, since these are relatively easy to identify from optical colours and spectra. White dwarfs with more massive FGK type companions have remained elusive due to the large difference in optical brightness between the two stars. In this paper, we identify 934 main-sequence FGK stars from the Radial Velocity Experiment survey in the Southern hemisphere and the Large Sky Area Multi-Object Fiber Spectroscopic Telescope survey in the Northern hemisphere, that show excess flux at ultraviolet wavelengths which we interpret as the likely presence of a white dwarf companion. We obtained Hubble Space Telescope ultraviolet spectra for nine systems which confirmed that the excess is indeed caused, in all cases, by a hot compact companion, eight being white dwarfs and one a hot subdwarf or pre-helium white dwarf, demonstrating that this sample is very clean. We also address the potential of this sample to test binary evolution models and Type Ia supernovae formation channels.

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Section: Sources Of Contaminationmentioning

confidence: 64%

The white dwarf binary pathways survey – I. A sample of FGK stars with white dwarf companions

Parsons

Rebassa‐Mansergas

Schreiber

et al. 2016

Mon. Not. R. Astron. Soc.

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“…There is a scatter of ∼0.2 mag for A B /A I and A V /A I , but a much smaller scatter of ∼0.05 mag, for A B /A V . Moreover, Kuehn et al (2011) find A B /A V = 1.28 ± 0.02 from 26 RR Lyrae variables in the OoI-type LMC GC NGC 1466 (see their Figure 9), and Kinman & Brown (2010) find A B /A V = 1.27 from 12 field RR Lyrae stars in the Northern Sky Variability Survey (NSVS) data. These results are in excellent agreement with the A B /A V amplitude ratios obtained here and in other Galactic GCs.…”

Section: Period-amplitude Diagrammentioning

confidence: 98%

THE RR LYRAE VARIABLES AND HORIZONTAL BRANCH OF NGC 6656 (M22)^,

Kunder¹,

Stetson²,

Cassisi³

et al. 2013

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The first calibrated broadband UBVI time-series photometry is presented for the RR Lyrae variable stars in NGC 6656 (M22), with observations spanning a range of twenty-two years. We have also redetermined the variability types and periods for the RR Lyrae stars identified previously by photographic observations, revising the number of fundamental-mode RR Lyrae variables (RR0) to 10 and the number of first-overtone variables (RR1) to 16. The mean periods of the RR0 and RR1 variables are P RR0 =0.66±0.02 d and P RR1 =0.33±0.01 d, respectively, supporting an Oosterhoff II classification for the cluster. The number ratio of RR1-to all RR-type variables is N 1 /N RR =0.61, also consistent with an Oosterhoff II designation. Both the RR Lyrae stars' minimum light colors and the blue edge of the RR Lyrae instability strip suggest E(B-V )=0.36±0.02 mag toward M22. Regarding the HB morphology of M22, we find (B-R)/(B+V +R)=+0.97±0.1 and at least one "gap" located in an unusual part of the blue HB, in the middle of the so-called hot HB stars.

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“…For example, the accurate classification of RR Lyrae is necessary when they are used to trace structure within the Galactic halo. However, the potential for misclassifying contact binaries as RRc's can limit the accuracy of results derived from uncertain classifications (Kinman & Brown 2010). In Drake et al (2013a) we outlined how it was possible to separate RRab's from contact eclipsing binaries based on a modified version of the so-called M-test (Kinemuchi et al 2006, their eq.…”

Section: Rrc's Vs Contact Binariesmentioning

confidence: 99%

The Catalina Surveys Periodic Variable Star Catalog

Drake

Graham

Djorgovski

et al. 2014

ApJS

472

494

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With the discovery of the first transiting extrasolar planetary system back in 1999, a great number of projects started to hunt for other similar systems. Because the incidence rate of such systems was unknown and the length of the shallow transit events is only a few percent of the orbital period, the goal was to monitor continuously as many stars as possible for at least a period of a few months. Small aperture, large field of view automated telescope systems have been installed with a parallel development of new data reduction and analysis methods, leading to better than 1% per data point precision for thousands of stars. With the successful launch of the photometric satellites CoRoT and Kepler, the precision increased further by one-two orders of magnitude. Millions of stars have been analyzed and searched for transits. In the history of variable star astronomy this is the biggest undertaking so far, resulting in photometric time series inventories immensely valuable for the whole field. In this review we briefly discuss the methods of data analysis that were inspired by the main science driver of these surveys and highlight some of the most interesting variable star results that impact the field of variable star astronomy.

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THE IDENTIFICATION OF RR LYRAE AND δ SCUTTI STARS FROM VARIABLEGALAXY EVOLUTION EXPLORERULTRAVIOLET SOURCES

Cited by 17 publications

References 55 publications

The white dwarf binary pathways survey – I. A sample of FGK stars with white dwarf companions

The white dwarf binary pathways survey – I. A sample of FGK stars with white dwarf companions

THE RR LYRAE VARIABLES AND HORIZONTAL BRANCH OF NGC 6656 (M22)^,

The Catalina Surveys Periodic Variable Star Catalog

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THE IDENTIFICATION OF RR LYRAE AND δ SCUTTI STARS FROM VARIABLEGALAXY EVOLUTION EXPLORERULTRAVIOLET SOURCES

Cited by 17 publications

References 55 publications

The white dwarf binary pathways survey – I. A sample of FGK stars with white dwarf companions

The white dwarf binary pathways survey – I. A sample of FGK stars with white dwarf companions

THE RR LYRAE VARIABLES AND HORIZONTAL BRANCH OF NGC 6656 (M22),

The Catalina Surveys Periodic Variable Star Catalog

Contact Info

Product

Resources

About

THE RR LYRAE VARIABLES AND HORIZONTAL BRANCH OF NGC 6656 (M22)^,