Zobrazeno 1 - 10
of 113
pro vyhledávání: '"Schlesinger, Katharine J."'
Autor:
Hughes, Arvind C. N., Spitler, Lee R., Zucker, Daniel B., Nordlander, Thomas, Simpson, Jeffrey, Da Costa, Gary S., Ting, Yuan-Sen, Li, Chengyuan, Bland-Hawthorn, Joss, Buder, Sven, Casey, Andrew R., De Silva, Gayandhi M., D'Orazi, Valentina, Freeman, Ken C., Hayden, Michael R., Kos, Janez, Lewis, Geraint F., Lin, Jane, Lind, Karin, Martell, Sarah L., Schlesinger, Katharine J., Sharma, Sanjib, Zwitter, Tomaz, Collaboration, The GALAH
Extremely Metal-Poor (EMP) stars provide a valuable probe of early chemical enrichment in the Milky Way. Here we leverage a large sample of $\sim600,000$ high-resolution stellar spectra from the GALAH survey plus a machine learning algorithm to find
Externí odkaz:
http://arxiv.org/abs/2203.10843
Autor:
Clark, Jake T., Wright, Duncan J., Wittenmyer, Robert A., Horner, Jonathan, Hinkel, Natalie R., Clerté, Mathieu, Carter, Brad D., Buder, Sven, Hayden, Michael R., Bland-Hawthorn, Joss, Casey, Andrew R., De Silva, Gayandhi M., D'Orazi, Valentina, Freeman, Ken C., Kos, Janez, Lewis, Geraint F., Lin, Jane, Lind, Karin, Martell, Sarah L., Schlesinger, Katharine J., Sharma, Sanjib, Simpson, Jeffrey D., Stello, Dennis, Zucker, Daniel B., Zwitter, Tomaž, Munari, Ulisse, Nordlander, Thomas
Pioneering photometric, astrometric, and spectroscopic surveys are helping exoplanetary scientists better constrain the fundamental properties of stars within our galaxy, and the planets these stars host. In this study, we use the third data release
Externí odkaz:
http://arxiv.org/abs/2111.14883
Autor:
Buder, Sven, Lind, Karin, Ness, Melissa K., Feuillet, Diane K., Horta, Danny, Monty, Stephanie, Buck, Tobias, Nordlander, Thomas, Bland-Hawthorn, Joss, Casey, Andrew R., De Silva, Gayandhi M., D'Orazi, Valentina, Freeman, Ken C., Hayden, Michael R., Kos, Janez, Martell, Sarah L., Lewis, Geraint F., Lin, Jane, Schlesinger, Katharine. J., Sharma, Sanjib, Simpson, Jeffrey D., Stello, Dennis, Zucker, Daniel B., Zwitter, Tomaz, Ciuca, Ioana, Horner, Jonathan, Kobayashi, Chiaki, Ting, Yuan-Sen, Wyse, Rosemary F. G., Collaboration, The GALAH
Publikováno v:
MNRAS, 510, 2407 (2022)
Since the advent of $Gaia$ astrometry, it is possible to identify massive accreted systems within the Galaxy through their unique dynamical signatures. One such system, $Gaia$-Sausage-Enceladus (GSE), appears to be an early "building block" given its
Externí odkaz:
http://arxiv.org/abs/2109.04059
Autor:
Zucker, Daniel B., Simpson, Jeffrey D., Martell, Sarah L., Lewis, Geraint F., Casey, Andrew R., Ting, Yuan-Sen, Horner, Jonathan, Nordlander, Thomas, Wyse, Rosemary F. G., Zwitter, Tomaz, Bland-Hawthorn, Joss, Buder, Sven, Asplund, Martin, De Silva, Gayandhi M., D'Orazi, Valentina, Freeman, Ken C., Hayden, Michael R., Kos, Janez, Lin, Jane, Lind, Karin, Schlesinger, Katharine J., Sharma, Sanjib, Stello, Dennis
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:
http://arxiv.org/abs/2104.08684
Autor:
Zwitter, Tomaž, Kos, Janez, Buder, Sven, Čotar, Klemen, Asplund, Martin, Bland-Hawthorn, Joss, Casey, Andrew R., De Silva, Gayandhi M., D'Orazi, Valentina, Freeman, Kenneth C., Hayden, Michael R., Lewis, Geraint F., Lin, Jane, Lind, Karin, Martell, Sarah L., Schlesinger, Katharine J., Sharma, Sanjib, Simpson, Jeffrey D., Stello, Dennis, Zucker, Daniel B., Beeson, Kevin L., de Grijs, Richard, Nordlander, Thomas, Ting, Yuan-Sen, Traven, Gregor, Vogrinčič, Rok, Watson, Fred, Wittenmyer, Rob
Publikováno v:
2021, MNRAS, 508, 4202-4215
GALAH+ is a magnitude-limited survey of high resolution stellar spectra obtained by the HERMES spectrograph at the Australian Astronomical Observatory. Its third data release provides reduced spectra with new derivations of stellar parameters and abu
Externí odkaz:
http://arxiv.org/abs/2012.12201
Autor:
Sharma, Sanjib, Hayden, Michael R., Bland-Hawthorn, Joss, Stello, Dennis, Buder, Sven, Zinn, Joel C., Spina, Lorenzo, Kallinger, Thomas, Asplund, Martin, De Silva, Gayandhi M., D'Orazi, Valentina, Freeman, Ken C., Kos, Janez, Lewis, Geraint F., Lin, Jane, Lind, Karin, Martell, Sarah L., Schlesinger, Katharine J., Simpson, Jeffrey D., Zucker, Daniel B., Zwitter, Tomaz, Cotar, Klemen, Chen, Boquan, Kafle, Prajwal R., Khanna, Shourya, Wang, Purmortal, Wittenmyer, Rob A.
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:
http://arxiv.org/abs/2011.13818
Autor:
Hayden, Michael R., Sharma, Sanjib, Bland-Hawthorn, Joss, Spina, Lorenzo, Buder, Sven, Asplund, Martin, Casey, Andrew R., De Silva, Gayandhi M., D'Orazi, Valentina, Freeman, Ken C., Kos, Janez, Lewis, Geraint F., Lin, Jane, Lind, Karin, Martell, Sarah L., Schlesinger, Katharine J., Simpson, Jeffrey D., Zucker, Daniel B., Zwitter, Tomaz, Chen, Boquan, Cotar, Klemen, Feuillet, Diane, Horner, Jonti, Joyce, Meridith, Nordlander, Thomas, Stello, Dennis, Tepper-Garcia, Thorsten, Ting, Yuan-sen, Wang, Purmortal, Wittenmyer, Rob
Previous studies have found that the elemental abundances of a star correlate directly with its age and metallicity. Using this knowledge, we derive ages for a sample of 250,000 stars taken from GALAH DR3 using only their overall metallicity and chem
Externí odkaz:
http://arxiv.org/abs/2011.13745
Autor:
Nandakumar, Govind, Hayden, Michael R., Sharma, Sanjib, Buder, Sven, Asplund, Martin, Bland-Hawthorn, Joss, De Silva, Gayandhi M., D'Orazi, Valentina, Freeman, Ken C., Kos, Janez, Lewis, Geraint F., Martell, Sarah L., Schlesinger, Katharine J., Lin, Jane, Simpson, Jeffrey D., Zucker, Daniel B., Zwitter, Tomaz, Nordlander, Thomas, Casagrande, Luca, Lind, Karin, Cotar, Klemen, Stello, Dennis, Wittenmyer, Robert A., Tepper-Garcia, Thor
APOGEE and GALAH are two high resolution multi-object spectroscopic surveys that provide fundamental stellar parameters and multiple elemental abundance estimates for about half a million stars in the Milky Way. Both surveys observe in different wave
Externí odkaz:
http://arxiv.org/abs/2011.02783
Autor:
Simpson, Jeffrey D., Martell, Sarah L., Buder, Sven, Sharma, Sanjib, Asplund, Martin, Bland-Hawthorn, Joss, Casey, Andrew R., De Silva, Gayandhi M., D'Orazi, Valentina, Freeman, Ken C., Hayden, Michael, Kos, Janez, Lewis, Geraint F., Lind, Karin, Stello, Dennis, Zucker, Daniel B., Zwitter, Tomaž, Schlesinger, Katharine J., Ting, Yuan-Sen, Nordlander, Thomas, Da Costa, Gary, Čotar, Klemen, Horner, Jonathan, Tepper-García, Thor, Collaboration, The GALAH
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:
http://arxiv.org/abs/2011.02659
Autor:
Spina, Lorenzo, Ting, Yuan-Sen, De Silva, Gayandhi M., Frankel, Neige, Sharma, Sanjib, Cantat-Gaudin, Tristan, Joyce, Meridith, Stello, Dennis, Karakas, Amanda I., Asplund, Martin B., Nordlander, Thomas, Casagrande, Luca, D'Orazi, Valentina, Casey, Andrew R., Cottrell, Peter, Tepper-García, Thor, Baratella, Martina, Kos, Janez, Čotar, Klemen, Bland-Hawthorn, Joss, Buder, Sven, Freeman, Ken C., Hayden, Michael R., Lewis, Geraint F., Lin, Jane, Lind, Karin, Martell, Sarah L., Schlesinger, Katharine J., Simpson, Jeffrey D., Zucker, Daniel B., Zwitter, Tomaž
Open clusters are unique tracers of the history of our own Galaxy's disk. According to our membership analysis based on \textit{Gaia} astrometry, out of the 226 potential clusters falling in the footprint of GALAH or APOGEE, we find that 205 have sec
Externí odkaz:
http://arxiv.org/abs/2011.02533