Benjamin C. Kaiser
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View article: The Origins of Lithium Enhancement in Polluted White Dwarfs
The Origins of Lithium Enhancement in Polluted White Dwarfs Open
The bulk abundances of exoplanetesimals can be measured when they are accreted by white dwarfs. Recently, lithium from the accretion of exoplanetesimals was detected in relatively high levels in multiple white dwarfs. There are presently t…
View article: The Origins of Lithium Enhancement in Polluted White Dwarfs
The Origins of Lithium Enhancement in Polluted White Dwarfs Open
The bulk abundances of exoplanetesimals can be measured when they are accreted by white dwarfs. Recently, lithium from the accretion of exoplanetesimals was detected in relatively high levels in multiple white dwarfs. There are presently t…
View article: Using 3.4 μm Variability toward White Dwarfs as a Signpost of Remnant Planetary Systems
Using 3.4 μm Variability toward White Dwarfs as a Signpost of Remnant Planetary Systems Open
Roughly 2% of white dwarfs harbor planetary debris disks detectable via infrared excesses, but only a few percent of these disks show a gaseous component, distinguished by their double-peaked emission at the near-infrared calcium triplet. …
View article: A Test of Spectroscopic Age Estimates of White Dwarfs Using Wide WD+WD Binaries
A Test of Spectroscopic Age Estimates of White Dwarfs Using Wide WD+WD Binaries Open
White dwarf stars have been used for decades as precise and accurate age indicators. This work presents a test of the reliability of white dwarf total ages when spectroscopic observations are available. We conduct follow-up spectroscopy of…
View article: Lithium Pollution of White Dwarfs and Other Secrets of MORDOR (CSV File of MORDOR Survey Objects)
Lithium Pollution of White Dwarfs and Other Secrets of MORDOR (CSV File of MORDOR Survey Objects) Open
CSV file containing the Gaia DR2 data for the MORDOR Survey from Benjamin C. Kaiser's Ph.D. Dissertation. It also contains the spectral types and SED types that were identified. If you use this data please cite my dissertation, which shoul…
View article: Lithium Pollution of White Dwarfs and Other Secrets of MORDOR (CSV File of MORDOR Survey Objects)
Lithium Pollution of White Dwarfs and Other Secrets of MORDOR (CSV File of MORDOR Survey Objects) Open
CSV file containing the Gaia DR2 data for the MORDOR Survey from Benjamin C. Kaiser's Ph.D. Dissertation. It also contains the spectral types and SED types that were identified. If you use this data please cite my dissertation, which shoul…
View article: Two new white dwarfs with variable magnetic Balmer emission lines
Two new white dwarfs with variable magnetic Balmer emission lines Open
We report the discovery of two apparently isolated stellar remnants that exhibit rotationally modulated magnetic Balmer emission, adding to the emerging DAHe class of white dwarf stars. While the previously discovered members of this class…
View article: Discovery of 74 new bright ZZ Ceti stars in the first three years of <i>TESS</i>
Discovery of 74 new bright ZZ Ceti stars in the first three years of <i>TESS</i> Open
We report the discovery of 74 new pulsating DA white dwarf stars, or ZZ Cetis, from the data obtained by the Transiting Exoplanet Survey Satellite mission, from Sectors 1 to 39, corresponding to the first 3 cycles. This includes objects fr…
View article: Velocity-imaging the rapidly precessing planetary disc around the white dwarf HE 1349–2305 using Doppler tomography
Velocity-imaging the rapidly precessing planetary disc around the white dwarf HE 1349–2305 using Doppler tomography Open
The presence of planetary material in white dwarf atmospheres, thought to be accreted from a dusty debris disc produced via the tidal disruption of a planetesimal, is common. Approximately 5 per cent of these discs host a co-orbital gaseou…
View article: Lithium pollution of a white dwarf records the accretion of an extrasolar planetesimal (Reduction and Analysis Code)
Lithium pollution of a white dwarf records the accretion of an extrasolar planetesimal (Reduction and Analysis Code) Open
Reduction and Analysis Code for Kaiser et al. 2020, Lithium pollution of a white dwarf records the accretion of an extrasolar planetesimal, https://science.sciencemag.org/cgi/doi/10.1126/science.abd1714 This code contains the scripts used …
View article: A 15.7-Minute AM CVn Binary Discovered in K2
A 15.7-Minute AM CVn Binary Discovered in K2 Open
We present the discovery of SDSS J135154.46−064309.0, a short-period variable observed using 30-mincadence photometry in K2 Campaign 6. Follow-up spectroscopy and high-speed photometry support a classification as a new member of the rare c…