Zobrazeno 1 - 10
of 366
pro vyhledávání: '"Howard E. Bond"'
Autor:
Nancy Remage Evans, Gail H. Schaefer, Alexandre Gallenne, Guillermo Torres, Elliott P. Horch, Richard I. Anderson, John D. Monnier, Rachael M. Roettenbacher, Fabien Baron, Narsireddy Anugu, James W. Davidson Jr., Pierre Kervella, Garance Bras, Charles Proffitt, Antoine Mérand, Margarita Karovska, Jeremy Jones, Cyprien Lanthermann, Stefan Kraus, Isabelle Codron, Howard E. Bond, Giordano Viviani
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 2, p 190 (2024)
The 30 yr orbit of the Cepheid Polaris has been followed with observations by the Center for High Angular Resolution Astronomy (CHARA) Array from 2016 through 2021. An additional measurement has been made with speckle interferometry at the Apache Poi
Externí odkaz:
https://doaj.org/article/7c3ba5741f58471792c01d41d6d9f3cc
Publikováno v:
The Astronomical Journal, Vol 168, Iss 4, p 160 (2024)
If a planetary nebula (PN) is shown to be a member of a star cluster, we obtain important new constraints on the mass and chemical composition of the PN’s progenitor star, which cannot be determined for PNe in the field. Cluster membership can be t
Externí odkaz:
https://doaj.org/article/aa92dbf04f164e77bc3b69ea0bf2fe10
Autor:
Howard E. Bond, Akshat S. Chaturvedi, Robin Ciardullo, Klaus Werner, Gregory R. Zeimann, Michael H. Siegel
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 2, p 164 (2024)
During our spectroscopic survey of central stars of faint planetary nebulae (PNe), we found that the nucleus of Abell 57 exhibits strong nebular emission lines. Using synthetic narrowband images, we show that the emission arises from an unresolved co
Externí odkaz:
https://doaj.org/article/773fd6e870b04453b67ae7e147e4d48b
Autor:
Nancy Remage Evans, H. Moritz Günther, Howard E. Bond, Gail H. Schaefer, Brian D. Mason, Margarita Karovska, Evan Tingle, Scott Wolk, Scott Engle, Edward Guinan, Ignazio Pillitteri, Charles Proffitt, Pierre Kervella, Alexandre Gallenne, Richard I. Anderson, Maxwell Moe
Publikováno v:
The Astrophysical Journal, Vol 969, Iss 2, p 167 (2024)
Externí odkaz:
https://doaj.org/article/33e643295e5748ddbe7650e1a13c0af8
Autor:
Howard E. Bond, Gregory R. Zeimann
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 122 (2024)
We present optical spectroscopy of the 12th-magnitude central star of the planetary nebula (PN) Patchick 27 (Pa 27), obtained during a survey of faint PN nuclei (PNNs) with the Low-Resolution Spectrograph of the Hobby–Eberly Telescope. The optical
Externí odkaz:
https://doaj.org/article/4244d887d96644c39492748108060fa8
We report initial results from an ongoing spectroscopic survey of central stars of faint planetary nebulae (PNe), obtained with the Low-Resolution Spectrograph on the Hobby-Eberly Telescope. The six PN nuclei (PNNi) discussed here all have strong emi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e4a8d3e7098cbe3e5ebdb8fe9cde6f4a
We use results of a survey for low-surface-gravity stars in Galactic (and LMC) globular clusters to show that "yellow" post-asymptotic-giant-branch (yPAGB) stars are likely to be excellent extragalactic standard candles, capable of producing distance
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::662cfb334cd74d1705729dd8cc4fb41a
http://arxiv.org/abs/2204.06084
http://arxiv.org/abs/2204.06084
Autor:
Howard E. Bond, Jacob E. Jencson, Patricia A. Whitelock, Scott M. Adams, John Bally, Ann Marie Cody, Robert D. Gehrz, Mansi M. Kasliwal, Frank J. Masci
The SPitzer InfraRed Intensive Transients Survey (SPIRITS) searched for luminous infrared (IR) transients and variables in nearly 200 nearby galaxies from 2014 to 2019, using the warm Spitzer telescope at 3.6 and 4.5 μm. Among the SPIRITS variables
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48e5cb807f5e64c60784596d4976d039
https://resolver.caltech.edu/CaltechAUTHORS:20220224-200949995
https://resolver.caltech.edu/CaltechAUTHORS:20220224-200949995
Nova Sagittarii 1943 (V1148 Sgr) was an 8th-mag optical transient that was unusual in having a late-type spectrum during its outburst, in striking contrast to the normal high-excitation spectra seen in classical novae. Unfortunately, only an approxim
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::afefcd1baae196e870e6ec470fd6d0e6
Autor:
Karl Gebhardt, Keith Hawkins, Christopher Sneden, Dustin Davis, Barbara G. Castanheira, Donald P. Schneider, Caitlin M. Casey, Andreas Kelz, J. Craig Wheeler, Steven L. Finkelstein, Daniel J. Farrow, Gary J. Hill, Erin Mentuch Cooper, Andreia Carrillo, Howard E. Bond, Robin Ciardullo, Greg Zeimann, Matthias Steinmetz, Matthew Shetrone, Chenxu Liu, Else Starkenburg
Publikováno v:
The Astrophysical Journal, 911(2):108. IOP PUBLISHING LTD
The Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is an unbiased, massively multiplexed spectroscopic survey, designed to measure the expansion history of the universe through low-resolution ($R\sim750$) spectra of Lyman-Alpha Emitters. In i