Zobrazeno 1 - 10
of 65
pro vyhledávání: '"Eric L. Sandquist"'
Autor:
Rex Lam, Eric L. Sandquist, Gail H. Schaefer, Christopher D. Farrington, John D. Monnier, Narsireddy Anugu, Cyprien Lanthermann, Robert Klement, Jacob Ennis, Benjamin R. Setterholm, Tyler Gardner, Stefan Kraus, Claire L. Davies, Jerome A. Orosz
Publikováno v:
The Astronomical Journal, Vol 166, Iss 1, p 29 (2023)
We present measurements of the interferometrically resolved binary star system 12 Com and the single giant star 31 Com in the cluster Coma Berenices. 12 Com is a double-lined spectroscopic binary system consisting of a G7 giant and an A3 dwarf at the
Externí odkaz:
https://doaj.org/article/ba7343c603ab47fca87b391537e1afbb
Autor:
Eric L. Sandquist, Andrew J. Buckner, Matthew D. Shetrone, Samuel C. Barden, Catherine A. Pilachowski, Constantine P. Deliyannis, Dianne Harmer, Robert Mathieu, Søren Meibom, Søren Frandsen, Jerome A. Orosz
Publikováno v:
The Astronomical Journal, Vol 165, Iss 1, p 6 (2022)
We present analyses of improved photometric and spectroscopic observations for two detached eclipsing binaries at the turnoff of the open cluster NGC 752: the 1.01 days binary DS And and the 15.53 days BD +37 410. For DS And, we find M _1 = 1.692 ±
Externí odkaz:
https://doaj.org/article/c8ddf3dbb3c04ca08372ac96019b7554
Extremely precise age and metallicity of the open cluster NGC 2506 using detached eclipsing binaries
Autor:
Frank Grundahl, Torben Arentoft, René Tronsgaard, David Yong, S. Frandsen, Karsten Brogaard, Eric L. Sandquist, Jerome A. Orosz, D. Slumstrup, Mikkel N. Lund, H. Bruntt, Jens Jessen-Hansen, Emil Knudstrup
Publikováno v:
Knudstrup, E, Grundahl, F, Brogaard, K, Slumstrup, D, Orosz, J A, Sandquist, E L, Jessen-Hansen, J, Lund, M N, Arentoft, T, Tronsgaard, R, Yong, D, Frandsen, S & Bruntt, H 2020, ' Extremely precise age and metallicity of the open cluster NGC 2506 using detached eclipsing binaries ', Monthly Notices of the Royal Astronomical Society, vol. 499, no. 1, pp. 1312-1339 . https://doi.org/10.1093/mnras/staa2855
Accurate stellar parameters of stars in open clusters can help constrain models of stellar structure and evolution. Here we wish to determine the age and metallicity content of the open cluster NGC 2506. To this end we investigated three detached ecl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2614768750a7d80cd5db58f15c0250e
https://doi.org/10.1093/mnras/staa2855
https://doi.org/10.1093/mnras/staa2855
Autor:
Leslie M. Morales, Eric L. Sandquist, Gail H. Schaefer, Christopher D. Farrington, Robert Klement, Luigi R. Bedin, Mattia Libralato, Luca Malavolta, Domenico Nardiello, Jerome A. Orosz, John D. Monnier, Stefan Kraus, Jean-Baptiste Le Bouquin, Narsireddy Anugu, Theo ten Brummelaar, Claire L. Davies, Jacob Ennis, Tyler Gardner, Cyprien Lanthermann
Publikováno v:
The Astronomical Journal
The Astronomical Journal, 2022, 164, ⟨10.3847/1538-3881/ac7329⟩
The Astronomical Journal, 2022, 164, ⟨10.3847/1538-3881/ac7329⟩
We observe the brightest member of the Praesepe cluster, ϵ Cnc, to precisely measure the characteristics of the stars in this binary system, en route to a new measurement of the cluster’s age. We present spectroscopic radial velocity measurements
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0ec0b9fdc06c0f589ef15f7b95ec0455
https://hal-insu.archives-ouvertes.fr/insu-03780756
https://hal-insu.archives-ouvertes.fr/insu-03780756
Autor:
Jerome A. Orosz, J. R. Larsen, Robert D. Mathieu, C. T. G. Sørensen, S. T. Bjørn, Dennis Stello, J. H. Jørgensen, Karsten Brogaard, Imants Platais, J. B. Thomsen, T. Arentoft, Jens Jessen-Hansen, D. Slumstrup, Soren Meibom, S. Frandsen, M. L. Jensen, F. Grundahl, Nils Ryde, Aaron M. Geller, Eric L. Sandquist, Hans Bruntt
Publikováno v:
Brogaard, K, Grundahl, F, Sandquist, E L, Slumstrup, D, Thomsen, J B, Jørgensen, J H, Larsen, J R, Bjørn, S T, Sørensen, C T G, Bruntt, H, Arentoft, T, Frandsen, S, Jessen-Hansen, J, Orosz, J A, Mathieu, R, Geller, A, Ryde, N, Stello, D, Meibom, S, Platais, I & Jensen, M L 2021, ' Age and helium content of the open cluster NGC 6791 from multiple eclipsing binary members : III. Constraints from a subgiant ', Astronomy and Astrophysics, vol. 649, A178 . https://doi.org/10.1051/0004-6361/202140911
Models of stellar structure and evolution can be constrained using accurate measurements of the parameters of eclipsing binary members of open clusters. Multiple binary stars provide the means to tighten the constraints and, in turn, to improve the p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::538dbef74f0fd029f67d464ca31c41d0
https://pure.au.dk/portal/da/publications/age-and-helium-content-of-the-open-cluster-ngc-6791-from-multiple-eclipsing-binary-members(e4986b0a-6324-48bc-a4ab-a86d9233efc5).html
https://pure.au.dk/portal/da/publications/age-and-helium-content-of-the-open-cluster-ngc-6791-from-multiple-eclipsing-binary-members(e4986b0a-6324-48bc-a4ab-a86d9233efc5).html
Autor:
Luca Malavolta, Mattia Libralato, Jerome A. Orosz, Emily Leiner, Domenico Nardiello, David W. Latham, Eric L. Sandquist, Andrew Vanderburg, Luigi R. Bedin, Dennis Stello, Robert D. Mathieu
Publikováno v:
The Astronomical Journal
The Astronomical Journal, 2021, 161, 24 pp. ⟨10.3847/1538-3881/abca8d⟩
Sandquist, E L, Latham, D W, Mathieu, R D, Leiner, E, Vanderburg, A, Stello, D, Orosz, J A, Bedin, L R, Libralato, M, Malavolta, L & Nardiello, D 2021, ' The K2 M67 study : Precise mass for a turnoff star in the old open cluster M67 ', Astronomical Journal, vol. 161, no. 2, 59 . https://doi.org/10.3847/1538-3881/abca8d
The Astronomical Journal, 2021, 161, 24 pp. ⟨10.3847/1538-3881/abca8d⟩
Sandquist, E L, Latham, D W, Mathieu, R D, Leiner, E, Vanderburg, A, Stello, D, Orosz, J A, Bedin, L R, Libralato, M, Malavolta, L & Nardiello, D 2021, ' The K2 M67 study : Precise mass for a turnoff star in the old open cluster M67 ', Astronomical Journal, vol. 161, no. 2, 59 . https://doi.org/10.3847/1538-3881/abca8d
We present a study of the bright detached eclipsing main sequence binary WOCS 11028 (Sanders 617) in the open cluster M67. Although the binary has only one eclipse per orbital cycle, we show that the masses of the stars can be derived very precisely
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::32af30c21cf639f4282937f3482732e5
http://hdl.handle.net/20.500.12386/33005
http://hdl.handle.net/20.500.12386/33005
Autor:
Miguel Aguilar, Andrew J. Buckner, Dennis Stello, Arturo J. Ortiz, Frank Grundahl, Daniel Ivan Rivera, Anne Hedlund, Andrew Vanderburg, Torben Arentoft, Taylor R. Ackerman, Karsten Brogaard, Christian Juarez, David Richarte, Ryan DeWitt, Eric L. Sandquist, Levi Schlapfer
Publikováno v:
Sandquist, E L, Stello, D, Arentoft, T, Brogaard, K, Grundahl, F, Vanderburg, A, Hedlund, A, Dewitt, R, Ackerman, T R, Aguilar, M, Buckner, A J, Juarez, C, Ortiz, A J, Richarte, D, Rivera, D I & Schlapfer, L 2020, ' Variability in the Massive Open Cluster NGC 1817 from K2 : A Rich Population of Asteroseismic Red Clump, Eclipsing Binary, and Main-sequence Pulsating Stars ', Astronomical Journal, vol. 159, no. 3, 96 . https://doi.org/10.3847/1538-3881/ab68df
We present a survey of variable stars detected in K2 Campaign 13 within the massive intermediate age ($\sim1$ Gyr) open cluster NGC 1817. We identify a complete sample of 44 red clump stars in the cluster, and have measured asteroseismic quantities (
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c0d6d86ddd3a80e9b37b480d1f8d0908
http://arxiv.org/abs/2001.01839
http://arxiv.org/abs/2001.01839
Autor:
K. L. Kjærgaard, Eric L. Sandquist, A. O. Thygesen, S. Frandsen, Frank Grundahl, Hans Bruntt, Rasmus Handberg, T. Arentoft, Karsten Brogaard, Paul G. Beck, Jens Jessen-Hansen, N. A. Haugaard, Andrea Miglio
Publikováno v:
Astronomische Nachrichten. 337:793-798
The accuracy of stellar masses and radii determined from asteroseismology is not known! We examine this issue for giant stars by comparing classical measurements of detached eclipsing binary systems (dEBs) with asteroseismic measurements from the Kep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d1f4b03f727b354d8e9e2e0b83465de0
https://doi.org/10.1002/asna.201612374
https://doi.org/10.1002/asna.201612374
Autor:
Jamie Tayar, David W. Latham, Garrett Somers, Luca Malavolta, Suzanne Aigrain, Rebecca Esselstein, Timothy M. Brown, Maxwell L. Pollack, Hannu Parviainen, Andrew Vanderburg, Luigi R. Bedin, Marc H. Pinsonneault, Samuel N. Quinn, Robert D. Mathieu, Domenico Nardiello, Mattia Libralato, Eric L. Sandquist, Dennis Stello, Jerome A. Orosz
Publikováno v:
Sandquist, E L, Mathieu, R D, Quinn, S N, Pollack, M L, Latham, D W, Brown, T M, Esselstein, R, Aigrain, S, Parviainen, H, Vanderburg, A, Stello, D, Somers, G, Pinsonneault, M H, Tayar, J, Orosz, J A, Bedin, L R, Libralato, M, Malavolta, L & Nardiello, D 2018, ' The K2 M67 Study : A Curiously Young Star in an Eclipsing Binary in an Old Open Cluster ', Astronomical Journal, vol. 155, no. 4, 152 . https://doi.org/10.3847/1538-3881/aab0ff
We present an analysis of a slightly eccentric ($e=0.05$), partially eclipsing long-period ($P = 69.73$ d) main sequence binary system (WOCS 12009, Sanders 1247) in the benchmark old open cluster M67. Using Kepler K2 and ground-based photometry along
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::17ac65ff0e1419238334455b83469ced
http://hdl.handle.net/11577/3278771
http://hdl.handle.net/11577/3278771
Autor:
S. Meibom, Imants Platais, Torben Arentoft, Robert G. Izzard, Gregory A. Feiden, Frank Grundahl, H. Bruntt, Matthew Shetrone, Jens Jessen-Hansen, Thomas M. Tauris, Dennis Stello, S. Frandsen, K. Brogaard, Jerome A. Orosz, Andrea Miglio, Nils Ryde, Robert D. Mathieu, Don A. VandenBerg, Aaron M. Geller, Eric L. Sandquist, S. M. Christiansen
Publikováno v:
Brogaard, K, Christiansen, S M, Grundahl, F, Miglio, A, Izzard, R G, Tauris, T M, Sandquist, E L, VandenBerg, D A, Jessen-Hansen, J, Arentoft, T, Bruntt, H, Frandsen, S, Orosz, J A, Feiden, G A, Mathieu, R, Geller, A, Shetrone, M, Ryde, N, Stello, D, Platais, I & Meibom, S 2018, ' The blue straggler V106 in NGC 6791: a prototype progenitor of old single giants masquerading as young ', Monthly Notices of the Royal Astronomical Society, vol. 481, no. 4, pp. 5062-5072 . https://doi.org/10.1093/mnras/sty2504
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society
We determine the properties of the binary star V106 in the old open cluster NGC6791. We identify the system to be a blue straggler cluster member by using a combination of ground-based and Kepler photometry and multi-epoch spectroscopy. The propertie
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bbebfb8e56835e9becbddab9ba271ffb