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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

New Beta Cephei Stars from the KELT Project

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Author(s):
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Labadie-Bartz, Jonathan [1, 2, 3] ; Handler, Gerald [4] ; Pepper, Joshua [3] ; Balona, Luis [5] ; De Cat, Peter [6] ; Stevens, Daniel J. [7, 8] ; Lund, Michael B. [9] ; Stassun, Keivan G. [10, 11] ; Rodriguez, Joseph E. [12] ; Siverd, Robert J. [10] ; James, David J. [12, 13] ; Kuhn, Rudolf B. [5, 14]
Total Authors: 12
Affiliation:
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[1] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 - USA
[2] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Rua Matao 1226, Cidade Univ, BR-05508900 Sao Paulo, SP - Brazil
[3] Lehigh Univ, Dept Phys, 16 Mem Dr East, Bethlehem, PA 18015 - USA
[4] Nicolaus Copernicus Astron Ctr, Bartycka 18, PL-00716 Warsaw - Poland
[5] South African Astron Observ, POB 9, ZA-7935 Cape Town - South Africa
[6] Royal Observ Belgium, Av Circulaire 3, Ringlaan 3, B-1180 Brussels - Belgium
[7] Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 - USA
[8] Penn State Univ, Ctr Exoplanets & Habitable Worlds, 525 Davey Lab, University Pk, PA 16802 - USA
[9] CALTECH, IPAC NASA, Exoplanet Sci Inst, 1200 E Calif Ave, Pasadena, CA 91125 - USA
[10] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 - USA
[11] Fisk Univ, Dept Phys, 1000 17th Ave North, Nashville, TN 37208 - USA
[12] Harvard & Smithsonian, Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 - USA
[13] Harvard Univ, Black Hole Initiat, 20 Garden St, Cambridge, MA 02138 - USA
[14] Southern African Large Telescope, POB 9, ZA-7935 Cape Town - South Africa
Total Affiliations: 14
Document type: Journal article
Source: ASTRONOMICAL JOURNAL; v. 160, n. 1 JUL 2020.
Web of Science Citations: 0
Abstract

We present the results of a search for Galactic beta Cephei stars, which are massive pulsating stars with both pressure modes and mixed modes. Thus, these stars can serve as benchmarks for seismological studies of the interiors of massive stars. We conducted the search by performing a frequency analysis on the optical light curves of known O- and B-type stars with data from the Kilodegree Extremely Little Telescope exoplanet survey. We identify 113 beta Cephei stars, of which 86 are new discoveries, which altogether represent a 70% increase in the number currently known. An additional 97 candidates are identified. Among our targets, we find five new eclipsing binaries and 22 stars with equal frequency spacings suggestive of rotational splitting of nonradial pulsation modes. Candidates for runaway stars among our targets and a number of interesting individual objects are discussed. Most of the known and newly discovered beta Cephei stars will be observed by the Transiting Exoplanet Survey Satellite mission, providing by far the most comprehensive observational data set of massive main-sequence pulsating stars of sufficient quality for detailed asteroseismic studies. Future analysis of these light curves has the potential to dramatically increase our understanding of the structure of stellar interiors and the physical processes taking place therein. (AU)

FAPESP's process: 17/23731-1 - Analysis and Modeling of a Large Sample of Galactic Be Stars
Grantee:Jonathan Michael Labadie-Bartz
Support type: Scholarships in Brazil - Post-Doctorate