The ongoing pursuit of R Coronae Borealis stars: the ASAS-3 survey strikes again

@article{Tisserand2012TheOP,
  title={The ongoing pursuit of R Coronae Borealis stars: the ASAS-3 survey strikes again},
  author={Patrick Tisserand and Geoffrey C. Clayton and Douglas L. Welch and Bogumił Pilecki and Lukasz Wyrzykowski and David Kilkenny},
  journal={Astronomy and Astrophysics},
  year={2012},
  volume={551}
}
Context. R Coronae Borealis stars (RCBs) are rare, hydrogen-deficient, carbon-rich supergiant variable stars that are likely the evolved merger products of pairs of CO and He white dwarfs. Only 55 RCB stars have been found in our galaxy and their distribution on the sky is weighted heavily by microlensing survey field positions. A less biased wide-area survey would enable us to test competing evolutionary scenarios, understand the population or populations that produce RCBs, and constrain their… 

Mining R Coronae Borealis stars from Catalina surveys

Aims. R Coronae Borealis stars (RCBs) are rare carbon stars that lack of hydrogen in their photospheresand are most likely products of white dwarf mergers. A census of RCBs can shed light on the

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R Coronae Borealis stars (RCBs) constitute a rare class of stars that are hydrogen depleted and carbon enriched, possibly from white dwarf mergers. RCBs are identified by their stochastic dimming

R CORONAE BOREALIS STARS IN M31 FROM THE PALOMAR TRANSIENT FACTORY

We report the discovery of R Coronae Borealis (RCB) stars in the Andromeda galaxy (M31) using the Palomar Transient Factory (PTF). RCB stars are rare hydrogen-deficient, carbon-rich supergiant

Census of R Coronae Borealis Stars. I. Infrared Light Curves from Palomar Gattini IR

We are undertaking the first systematic infrared (IR) census of R Coronae Borealis (RCB) stars in the Milky Way, beginning with IR light curves from the Palomar Gattini IR (PGIR) survey. The PGIR is

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The R Coronae Borealis (RCB) stars are rare hydrogen-deficient, carbon-rich supergiants. They undergo extreme, irregular declines in brightness of many magnitudes due to the formation of thick

R CORONAE BOREALIS STARS ARE VIABLE FACTORIES OF PRE-SOLAR GRAINS

We present a new theoretical estimate for the birthrate of R Coronae Borealis (RCB) stars that is in agreement with recent observational data. We find the current Galactic birthrate of RCB stars to

Are DY Persei Stars Cooler Cousins of R Coronae Borealis Stars?

In this paper we present, for the first time, the study of low resolution H- and K-band spectra of 7 DY Per type and suspect stars, as well as DY Persei itself. We also observed H- and K-band spectra

High-Resolution Optical Spectroscopy of the R Coronae Borealis Star V532 Ophiuchi at Maximum Light

High-resolution optical spectra of the R Coronae Borealis (RCB) star V532 Oph at light maximum are discussed. The absolute visual magnitude MV of the star is found to be -4.9 ± 0.5. The elemental

An all-sky search for R Coronae Borealis stars in ASAS-SN

We report the discovery of 19 new R Coronae Borealis (RCB) star and DY Per candidates with light curves from the All-Sky Automated Survey for Supernovae (ASAS-SN). We examined both an existing set of

VARIABLE WINDS AND DUST FORMATION IN R CORONAE BOREALIS STARS

We have observed P-Cygni and asymmetric, blue-shifted absorption profiles in the He i λ10830 lines of 12 R Coronae Borealis stars over short (1 month) and long (3 yr) timescales to look for

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