Barry Smalley's Outputs (153)

Using Balmer line profiles to investigate convection in A and F stars (2004)
Journal Article
Smalley, B., & Kupka, F. (2004). Using Balmer line profiles to investigate convection in A and F stars. Proceedings of the International Astronomical Union,

Balmer lines are an important diagnostic of stellar atmospheric structure, since they are formed at a wide range of depths within the atmosphere. The different Balmer lines are formed at slightly different depths making them useful atmospheric diagno... Read More about Using Balmer line profiles to investigate convection in A and F stars.

Model atmosphere analyses of post-common envelope stars (2004)
Journal Article
T. Rushton, M., Smalley, B., N. Ogley, R., H. Wood, J., H. Hauschildt, P., & N. Bleach, J. (2004). Model atmosphere analyses of post-common envelope stars. Proceedings of the International Astronomical Union,

Understanding post-common-envelope evolution is important in the studies of close-binary systems. The majority of all interacting binaries with a compact object in their system (e.g. cataclysmic variables, X-ray binaries) are thought to have passed t... Read More about Model atmosphere analyses of post-common envelope stars.

The ASTRA Spectrophotometer: A July 2004 Progress Report (2004)
Journal Article
Pazder, J., J. Adelman, S., Younger, P., F. Gulliver, A., Boyd, L., Epand, D., …Smalley, B. The ASTRA Spectrophotometer: A July 2004 Progress Report. https://doi.org/10.1017/S1743921305009968. Manuscript submitted for publication

A cross-dispersed spectrophotometer with CCD detector and its automated 0.5-m telescope at the Fairborn Observatory, now under construction, should begin observations in 6 to 9 months. The Citadel ASTRA Telescope will be able to observe Vega the prim... Read More about The ASTRA Spectrophotometer: A July 2004 Progress Report.

Observations of convection in A-type stars (2004)
Journal Article
Smalley, B. Observations of convection in A-type stars. https://doi.org/10.1017/S1743921304004478. Manuscript submitted for publication

Convection and turbulence in stellar atmospheres have a significant effect on the emergent flux from A-type stars. The recent theoretical advancements in convection modelling have proved a challenge to the observers to obtain measurements with suffic... Read More about Observations of convection in A-type stars.

Accurate fundamental parameters of eclipsing binary stars (2004)
Journal Article
Southworth, J., Smalley, B., Maxted, P., & Etzel, P. (2004). Accurate fundamental parameters of eclipsing binary stars. Proceedings of the International Astronomical Union, 2004(IAUS224), 548-561. https://doi.org/10.1017/S1743921305009324

The study of detached eclipsing binaries is one of the most powerful ways to investigate the properties of individual stars and stellar systems. We present preliminary masses, radii and effective temperatures for the eclipsing binary WW Aurigae, whic... Read More about Accurate fundamental parameters of eclipsing binary stars.

The Li Overabundance of J37: Diffusion or Accretion? (2004)
Journal Article
F. Ashwell, J., Jeffries, R. D., Smalley, B., P. Deliyannis, C., Steinhauer, A., & R. King, J. (2004). The Li Overabundance of J37: Diffusion or Accretion?. Proceedings of the International Astronomical Union, 2004(IAUS224), https://doi.org/10.1017/S1743921305009385

In September 2002 the discovery of a super Li-rich F-dwarf (J37) in NGC 6633, an iron poor analogue of the better studied Hyades and Praecepe open clusters, was announced. This unique star was thought to be the smoking gun for the action of diffusion... Read More about The Li Overabundance of J37: Diffusion or Accretion?.

Eclipsing binaries in open clusters (2003)
Conference Proceeding
Southworth, J., Maxted, P., & Smalley, B. (2003). Eclipsing binaries in open clusters.

Accurate physical parameters have been determined for two early-type detached eclipsing binaries in the open cluster h Persei (NGC 869). Masses accurate to 1.5% are derived from high-resolution spectroscopy and radii accurate to 4--6% have been obtai... Read More about Eclipsing binaries in open clusters.

On the anomaly of Balmer line profiles of A-type stars. Fundamental binary systems (2002)
Journal Article
Smalley, B., B. Gardiner, R., Kupka, F., & S. Bessell, M. (2002). On the anomaly of Balmer line profiles of A-type stars. Fundamental binary systems. Astronomy & Astrophysics, 395(2), https://doi.org/10.1051/0004-6361%3A20021330

In previous work, Gardiner et al. (1999) found evidence for a discrepancy between the Teff obtained from Balmer lines with that from photometry and fundamental values for A-type stars. An investigation into this anomaly is presented using Balmer line... Read More about On the anomaly of Balmer line profiles of A-type stars. Fundamental binary systems.

Low Mass Stars and Brown Dwarfs around Sigma Orionis (2001)
Journal Article
Smalley. (2001). Low Mass Stars and Brown Dwarfs around Sigma Orionis

We present optical spectroscopy of 71 photometric candidate low-mass members of the cluster associated with Sigma Orionis. Thirty-five of these are found to pass the lithium test and hence are confirmed as true cluster members, covering a mass range... Read More about Low Mass Stars and Brown Dwarfs around Sigma Orionis.

Excess barium in a K dwarf-white dwarf binary system. (1996)
Journal Article
Jeffries, R. D., & Smalley, B. (1996). Excess barium in a K dwarf-white dwarf binary system. Astronomy and Astrophysics, 315, L19-L22

We present spectroscopic evidence for an excess of the s-process element barium, in the rapidly rotating, K-dwarf component of the wide binary system 2REJ0357+283. The secondary star is a hot white dwarf (WD) and our result argues for a model where t... Read More about Excess barium in a K dwarf-white dwarf binary system..

The first K2 roAp star: HD 24355 pulsating in a distorted quadruploe mode
Presentation / Conference
Smalley. The first K2 roAp star: HD 24355 pulsating in a distorted quadruploe mode. Presented at eismology of the Sun and the Distant Stars 2016 – Using Today’s Successes to Prepare the Future – TASC2 & KASC9 Workshop – SPACEINN & HELAS8 Conference

We present an analysis of the first K2 observations of a rapidly oscillating Ap (roAp) star, HD 24355. The star was discovered to be a roAp star by [1], with a frequency of 224.31 d-1 (2596.18 µHz; P = 6.4 min) and an amplitude of 1.51 mmag in SuperW... Read More about The first K2 roAp star: HD 24355 pulsating in a distorted quadruploe mode.

Asteroseismology with SuperWASP
Presentation / Conference
Smalley, B. Asteroseismology with SuperWASP

The highly successful SuperWASP planetary transit finding programme has surveyed a large fraction of both the northern and southern skies. There now exists in the its archive over 420 billion photometric measurements for more than 31 million stars. S... Read More about Asteroseismology with SuperWASP.

WASP-193b: An extremely low-density super-Neptune
Journal Article
Barkaoui, K., J. Pozuelos, F., Hellier, C., Smalley, B., D. Nielsen, L., Dorn, C., …G. West, R. WASP-193b: An extremely low-density super-Neptune. arXiv,

Gas giants transiting bright nearby stars are stepping stones for our understanding of planetary system formation and evolution mechanisms. This paper presents a particularly interesting new specimen of this kind of exoplanet discovered by the WASP-S... Read More about WASP-193b: An extremely low-density super-Neptune.