Zobrazeno 1 - 10
of 415
pro vyhledávání: '"Bailey, Jeremy A."'
Autor:
Bailey, Jeremy, Lewis, Fiona, Howarth, Ian D., Cotton, Daniel V., Marshall, Jonathan P., Kedziora-Chudczer, Lucyna
We report high-precision multi-wavelength linear-polarization observations of the bright B9 (or A0) star $\epsilon$ Sagittarii. The polarization shows the distinctive wavelength dependence expected for a rapidly rotating star. Analysis of the polariz
Externí odkaz:
http://arxiv.org/abs/2407.11352
We write to report the discovery that Deneb is a large amplitude polarization variable. Over a ~400 d time span from August 2022 Deneb's polarization was typically around 3900 parts-per-million (ppm) in the SDSS g'-band. Yet, it varied by several hun
Externí odkaz:
http://arxiv.org/abs/2404.17707
Autor:
Bailey, Jeremy, Howarth, Ian D., Cotton, Daniel V., Kedziora-Chudczer, Lucyna, De Horta, Ain, Martell, Sarah L., Eldridge, Colin, Luckas, Paul
We present time-series linear-polarization observations of the bright O4 supergiant $\zeta$ Puppis. The star is found to show polarization variation on timescales of around an hour and longer. Many of the observations were obtained contemporaneously
Externí odkaz:
http://arxiv.org/abs/2402.13383
Autor:
Li, Zhexing, Kane, Stephen R., Brandt, Timothy D., Fetherolf, Tara, Robertson, Paul, Zhao, Jinglin, Dalba, Paul A., Wittenmyer, Robert A., Butler, R. Paul, Diaz, Matias R., Howell, Steve B., Bailey, Jeremy, Carter, Brad, Furlan, Elise, Gnilka, Crystal L., Jones, Hugh R. A., O'Toole, Simon, Tinney, Chris
Multi-planet systems exhibit a diversity of architectures that diverge from the solar system and contribute to the topic of exoplanet demographics. Radial velocity (RV) surveys form a crucial component of exoplanet surveys, as their long observationa
Externí odkaz:
http://arxiv.org/abs/2401.17415
Autor:
Marshall, Jonathan P., Cotton, Daniel V., Bott, Kimberly, Bailey, Jeremy, Kedziora-Chudczer, Lucyna, Brown, Emma L.
Debris discs around main sequence stars have been extensively characterised from infrared to millimetre wavelengths through imaging, spectroscopic, and total intensity (scattered light and/or thermal emission) measurements. Polarimetric observations
Externí odkaz:
http://arxiv.org/abs/2303.17179
Autor:
Laliotis, Katherine, Burt, Jennifer A., Mamajek, Eric E., Li, Zhexing, Perdelwitz, Volker, Zhao, Jinglin, Butler, R. Paul, Holden, Bradford, Rosenthal, Lee, Fulton, B. J., Feng, Fabo, Kane, Stephen R., Bailey, Jeremy, Carter, Brad, Crane, Jeffrey D., Furlan, Elise, Gnilka, Crystal L., Howell, Steve B., Laughlin, Gregory, Shectman, Stephen A., Teske, Johanna K., Tinney, C. G., Vogt, Steven S., Wang, Sharon Xuesong, Wittenmyer, Robert A.
Directly imaging temperate rocky planets orbiting nearby, Sun-like stars with a 6-m-class IR/O/UV space telescope, recently dubbed the Habitable Worlds Observatory, is a high priority goal of the Astro2020 Decadal Survey. To prepare for future direct
Externí odkaz:
http://arxiv.org/abs/2302.10310
We have built and tested a compact, low-cost, but very-high-performance astronomical polarimeter based on a continuously rotating half-wave plate and a high-speed imaging detector. The polarimeter is suitable for small telescopes up to ~1 m in apertu
Externí odkaz:
http://arxiv.org/abs/2301.09782
We report new, extremely precise, photopolarimetry of the rapidly-rotating A0 main-sequence star $\zeta$ Aql, covering the wavelength range $\sim$400--900nm, which reveals a rotationally-induced signal. We model the polarimetry, together with the flu
Externí odkaz:
http://arxiv.org/abs/2301.05018
Autor:
Cotton, Daniel V., Buzasi, Derek L., Aerts, Conny, Bailey, Jeremy, Burssens, Siemen, Pedersen, May G., Stello, Dennis, Kedziora-Chudczer, Lucyna, De Horta, Ain, De Cat, Peter, Lewis, Fiona, Malla, Sai Prathyusha, Wright, Duncan J., Bott, Kimberly
Publikováno v:
Nature Astronomy, Vol 6, pages 154-164 (2022)
Here we report the detection of polarization variations due to nonradial modes in the beta Cephei star beta Crucis. In so doing we confirm 40-year-old predictions of pulsation-induced polarization variability and its utility in asteroseismology for m
Externí odkaz:
http://arxiv.org/abs/2205.11679
Autor:
Lewis, Fiona, Bailey, Jeremy, Cotton, Daniel V., Howarth, Ian D., Kedziora-Chudczer, Lucyna, van Leeuwen, Floor
We report high-precision observations of the linear polarization of the F1$\,$III star $\theta$ Scorpii. The polarization has a wavelength dependence of the form expected for a rapid rotator, but with an amplitude several times larger than seen in ot
Externí odkaz:
http://arxiv.org/abs/2204.02719