Zobrazeno 1 - 10
of 59
pro vyhledávání: '"Gayandhi M. de Silva"'
Autor:
J. M. Joel Ong, Marc Teng Yen Hon, Melinda Soares-Furtado, Alexander P. Stephan, Jennifer van Saders, Jamie Tayar, Benjamin Shappee, Daniel R. Hey, Lyra Cao, Mutlu Yıldız, Zeynep Çelik Orhan, Sibel Örtel, Benjamin Montet, Thomas W.-S. Holoien, Joss Bland-Hawthorn, Sven Buder, Gayandhi M. De Silva, Ken C. Freeman, Sarah L. Martell, Geraint F. Lewis, Sanjib Sharma, Dennis Stello
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 42 (2024)
We report the discovery and characterization of TIC 350842552 (“Zvrk”), an apparently isolated, rapidly rotating ( P _rot ∼ 99 days) red giant observed by TESS in its southern Continuous Viewing Zone. The star’s fast surface rotation is indep
Externí odkaz:
https://doaj.org/article/bb5b471dee324e7eada5b0ab43f2da63
Autor:
Rok Vogrinčič, Janez Kos, Tomaž Zwitter, Gregor Traven, Kevin L Beeson, Klemen Čotar, Ulisse Munari, Sven Buder, Sarah L Martell, Geraint F Lewis, Gayandhi M De Silva, Michael R Hayden, Joss Bland-Hawthorn, Valentina D’Orazi
We use more than 872,000 mid-to-high resolution (R $\sim$ 20,000) spectra of stars from the GALAH survey to discern the spectra of diffuse interstellar bands (DIBs). We use four windows with the wavelength range from 4718 to 4903, 5649 to 5873, 6481
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::090d52c8c9f0482fe1e7ea1ad7504f97
http://arxiv.org/abs/2303.14016
http://arxiv.org/abs/2303.14016
Autor:
Daniel B. Zucker, Gayandhi M. De Silva, Joss Bland-Hawthorn, Prajwal R. Kafle, Karin Lind, Thor Tepper-García, Robert A. Wittenmyer, Sarah L. Martell, Tomaž Zwitter, Lorenzo Spina, Geraint F. Lewis, Martin Asplund, Katharine J. Schlesinger, Thomas Kallinger, Purmortal Wang, Michael R. Hayden, Joel C. Zinn, Jeffrey D. Simpson, Janez Kos, Sven Buder, Jane Lin, Shourya Khanna, Valentina D'Orazi, Dennis Stello, Sanjib Sharma, Boquan Chen, Kenneth C. Freeman, Klemen Čotar
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Sharma, S, Hayden, M R, Bland-Hawthorn, J, Stello, D, Buder, S, Zinn, J C, Spina, L, Kallinger, T, Asplund, M, De Silva, G M, D'Orazi, V, Freeman, K C, Kos, J, Lewis, G F, Lin, J, Lind, K, Martell, S L, Schlesinger, K J, Simpson, J D, Zucker, D B, Zwitter, T, Chen, B, Cotar, K, Kafle, P R, Khanna, S, Tepper-Garcia, T, Wang, P & Wittenmyer, R A 2022, ' The GALAH Survey : Dependence of elemental abundances on age and metallicity for stars in the Galactic disc ', Monthly Notices of the Royal Astronomical Society, vol. 510, no. 1, pp. 734-752 . https://doi.org/10.1093/mnras/stab3341
Monthly Notices of the Royal Astronomical Society, 510(1), 734-752. Oxford University Press
Sharma, S, Hayden, M R, Bland-Hawthorn, J, Stello, D, Buder, S, Zinn, J C, Spina, L, Kallinger, T, Asplund, M, De Silva, G M, D'Orazi, V, Freeman, K C, Kos, J, Lewis, G F, Lin, J, Lind, K, Martell, S L, Schlesinger, K J, Simpson, J D, Zucker, D B, Zwitter, T, Chen, B, Cotar, K, Kafle, P R, Khanna, S, Tepper-Garcia, T, Wang, P & Wittenmyer, R A 2022, ' The GALAH Survey : Dependence of elemental abundances on age and metallicity for stars in the Galactic disc ', Monthly Notices of the Royal Astronomical Society, vol. 510, no. 1, pp. 734-752 . https://doi.org/10.1093/mnras/stab3341
Monthly Notices of the Royal Astronomical Society, 510(1), 734-752. Oxford University Press
Using data from the GALAH survey, we explore the dependence of elemental abundances on stellar age and metallicity among Galactic disc stars. We find that the abundance of most elements can be predicted from age and [Fe/H] with an intrinsic scatter o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cf74e84973a87a79abd3390988832526
https://doi.org/10.1093/mnras/stab3341
https://doi.org/10.1093/mnras/stab3341
Autor:
Daniel B. Zucker, Michael R. Hayden, Karin Lind, Thor Tepper-García, Thomas Nordlander, Kenneth C. Freeman, Geraint F. Lewis, Tomaž Zwitter, Katharine J. Schlesinger, Gayandhi M. De Silva, Dennis Stello, Jeffrey D. Simpson, Joss Bland-Hawthorn, Andrew R. Casey, Janez Kos, Sarah L. Martell, Gary S. Da Costa, Sanjib Sharma, Yuan-Sen Ting, Klemen Čotar, Rosemary F. G. Wyse, Sven Buder, Jonathan Horner, Martin Asplund, Valentina D'Orazi
Publikováno v:
Monthly Notices of the Royal Astronomical Society
The ESA Gaia astrometric mission has enabled the remarkable discovery that a large fraction of the stars near the Solar neighbourhood appear to be debris from a single in-falling system, the so-called Gaia-Enceladus-Sausage (GSE). One exciting featur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::15d113ee0e8622849b20873022f803a4
https://doi.org/10.1093/mnras/stab2012
https://doi.org/10.1093/mnras/stab2012
Autor:
Anna Brucalassi, Andrea Tozzi, Ernesto Oliva, Oscar A. Gonzalez, Sofia Randich, Gayandhi M. de Silva, Eline Tolstoy, Andrea Bianco, Matteo Genoni, Giorgio Pariani, Jon Lawrence, Thomas Bensby, Vanessa Hill, Rob Jeffries, Nadège Lagarde, Laura Magrini, Rodolfo Smiljanic, Asa Skuladöttir
Publikováno v:
Ground-based and Airborne Instrumentation for Astronomy IX: Proceedings, 12184
Following the idea originally proposed during the ESO-Workshop The Very Large Telescope in 2030, the concept of a high resolution spectrograph for the VLT has been further explored, both for the science and technological aspects. Such an instrument w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18c93d08fd30edd859e50416587cda71
https://doi.org/10.1117/12.2629654
https://doi.org/10.1117/12.2629654
Publikováno v:
Howell, M, Campbell, S W, Stello, D & De Silva, G M 2022, ' Integrated mass-loss of evolved stars in M4 using asteroseismology ', Monthly Notices of the Royal Astronomical Society, vol. 515, no. 3, pp. 3184-3198 . https://doi.org/10.1093/mnras/stac1918
Mass loss remains a major uncertainty in stellar modelling. In low-mass stars, mass loss is most significant on the red giant branch (RGB), and will impact the star's evolutionary path and final stellar remnant. Directly measuring the mass difference
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4a6c359a7d261d35fc3a021a18272342
http://arxiv.org/abs/2207.02406
http://arxiv.org/abs/2207.02406
Autor:
Jeffrey D. Simpson, Geraint F. Lewis, Zhen Wan, Eduardo Balbinot, Daniel B. Zucker, Prajwal R. Kafle, Gayandhi M. De Silva, Nora Shipp, Dougal Mackey, Alexander P. Ji, Joss Bland-Hawthorn, Sanjib Sharma, Andrew R. Casey, Andrew B. Pace, Ting S. Li, Sarah L. Martell, Kyler Kuehn, Jeremy Mould, Sergey E. Koposov, Denis Erkal, Gary S. Da Costa
Publikováno v:
Nature, 583(7818), 768-770. Nature Publishing Group
Wan, Z, Lewis, G F, Li, T S, Simpson, J D, Martell, S L, Zucker, D B, Mould, J R, Erkal, D, Pace, A B, Mackey, D, Ji, A P, Koposov, S E, Kuehn, K, Shipp, N, Balbinot, E, Bland-Hawthorn, J, Casey, A R, Costa, G S D, Kafle, P, Sharma, S & Silva, G M D 2020, ' The tidal remnant of an unusually metal-poor globular cluster ', Nature, pp. 768-770 . https://doi.org/10.1038/s41586-020-2483-6
Wan, Z, Lewis, G F, Li, T S, Simpson, J D, Martell, S L, Zucker, D B, Mould, J R, Erkal, D, Pace, A B, Mackey, D, Ji, A P, Koposov, S E, Kuehn, K, Shipp, N, Balbinot, E, Bland-Hawthorn, J, Casey, A R, Costa, G S D, Kafle, P, Sharma, S & Silva, G M D 2020, ' The tidal remnant of an unusually metal-poor globular cluster ', Nature, pp. 768-770 . https://doi.org/10.1038/s41586-020-2483-6
Globular clusters are some of the oldest bound stellar structures observed in the Universe. They are ubiquitous in large galaxies and are believed to trace intense star formation events and the hierarchical build-up of structure. Observations of glob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ee0773f8e3c71223089b1a5ee375e008
https://doi.org/10.1038/s41586-020-2483-6
https://doi.org/10.1038/s41586-020-2483-6
Autor:
Tenglin Li, Zhen Wan, Daniel B. Zucker, Sarah L. Martell, Dougal Mackey, Jeffrey D. Simpson, Nora Shipp, Joss Bland-Hawthorn, Kyler Kuehn, Thomas Nordlander, Mei-Yu Wang, Geraint F. Lewis, Gayandhi M. De Silva, Vasily Belokurov, Gary S. Da Costa, Andrew B. Pace, Sergey E. Koposov, Denis Erkal, Alexander P. Ji, Douglas Boubert
Publikováno v:
2020, ' Discovery of a nearby 1700 km s-1 star ejected from the Milky Way by Sgr A* ', Monthly Notices of the Royal Astronomical Society, vol. 491, no. 2, pp. 2465-2480 . https://doi.org/10.1093/mnras/stz3081
We present the serendipitous discovery of the fastest main-sequence hyper-velocity star (HVS) by the Southern Stellar Stream Spectroscopic Survey (S5). The star S5-HVS1 is a ∼2.35 M⊙ A-type star located at a distance of ∼9 kpc from the Sun and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::19ceace35d92574012dea31f4e1ccccf
https://doi.org/10.1093/mnras/stz3081
https://doi.org/10.1093/mnras/stz3081
Autor:
James Esdaile, Valentina D'Orazi, Sanjib Sharma, Tomaz Zwitter, Joel C. Zinn, Shourya Khanna, Jonathan Horner, Marc Hon, Thomas Nordlander, Kenneth C. Freeman, Janez Kos, Yuan-Sen Ting, Jane Lin, Geraint F. Lewis, Michael R. Hayden, Jeffrey D. Simpson, Sarah L. Martell, Boquan Chen, Gayandhi M. De Silva, David M. Nataf, Rosemary F. G. Wyse, Mohd Hafiz Mohd Saadon, Thomas Kallinger, Daniel Huber, Martin Asplund, Daniel B. Zucker, Klemen Čotar, Karin Lind, Dennis Stello, Gregor Traven, Sven Buder, Prajwal R. Kafle, Timothy R. Bedding, Robert A. Wittenmyer, Joss Bland-Hawthorn, Tanda Li, Duncan J. Wright
Publikováno v:
Sharma, S, Stello, D, Bland-Hawthorn, J, Hayden, M R, Zinn, J C, Kallinger, T, Hon, M, Asplund, M, Buder, S, de Silva, G M, D'Orazi, V, Freeman, K, Kos, J, Lewis, G F, Lin, J, Lind, K, Martell, S, Simpson, J D, Wittenmyer, R A, Zucker, D B, Zwitter, T, Bedding, T R, Chen, B, Cotar, K, Esdaile, J, Horner, J, Huber, D, Kafle, P R, Khanna, S, Li, T, Ting, Y S, Nataf, D M, Nordlander, T, Saadon, M H M, Traven, G, Wright, D & Wyse, R F G 2019, ' The K2-HERMES survey : Age and metallicity of the thick disc ', Monthly Notices of the Royal Astronomical Society, vol. 490, no. 4, pp. 5335-5352 . https://doi.org/10.1093/mnras/stz2861
Asteroseismology is a promising tool to study Galactic structure and evolution because it can probe the ages of stars. Earlier attempts comparing seismic data from the {\it Kepler} satellite with predictions from Galaxy models found that the models p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9ff78737cb32a82bc3af130760e2c3a0
https://doi.org/10.1093/mnras/stz2861
https://doi.org/10.1093/mnras/stz2861
Autor:
Sven Buder, Martin Asplund, Yuan-Sen Ting, Jonathan Horner, Janez Kos, Michael R. Hayden, Katharine J. Schlesinger, Geraint F. Lewis, Joss Bland-Hawthorn, Tomaž Zwitter, Jeffrey D. Simpson, Valentina D'Orazi, Sanjib Sharma, Daniel B. Zucker, Karin Lind, Jane Lin, Thomas Nordlander, Kenneth C. Freeman, Gayandhi M. De Silva, Sarah L. Martell, Rosemary F. G. Wyse, Andrew R. Casey, Dennis Stello
Publikováno v:
The Astrophysical Journal Letters
The results from the ESA Gaia astrometric mission and deep photometric surveys have revolutionized our knowledge of the Milky Way. There are many ongoing efforts to search these data for stellar substructure to find evidence of individual accretion e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cff6efdf0d52a3fc3a509fa6fb741f5e