Zobrazeno 1 - 10
of 102
pro vyhledávání: '"Kafle, Prajwal R."'
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:
Buder, Sven, Sharma, Sanjib, Kos, Janez, Amarsi, Anish M., Nordlander, Thomas, Lind, Karin, Martell, Sarah L., Asplund, Martin, Bland-Hawthorn, Joss, Casey, Andrew R., De Silva, Gayandhi M., D'Orazi, Valentina, Freeman, Ken C., Hayden, Michael R., Lewis, Geraint F., Lin, Jane, Schlesinger, Katharine J., Simpson, Jeffrey D., Stello, Dennis, Zucker, Daniel B., Zwitter, Tomaz, Beeson, Kevin L., Buck, Tobias, Casagrande, Luca, Clark, Jake T., Cotar, Klemen, Da Costa, Gary S., de Grijs, Richard, Feuillet, Diane, Horner, Jonathan, Kafle, Prajwal R., Khanna, Shourya, Kobayashi, Chiaki, Liu, Fan, Montet, Benjamin T., Nandakumar, Govind, Nataf, David M., Ness, Melissa K., Spina, Lorenzo, Tepper-Garcia, Thor, Ting, Yuan-Sen, Traven, Gregor, Vogrincic, Rok, Wittenmyer, Robert A., Wyse, Rosemary F. G., Zerjal, Marusa, collaboration, the GALAH
The ensemble of chemical element abundance measurements for stars, along with precision distances and orbit properties, provides high-dimensional data to study the evolution of the Milky Way. With this third data release of the Galactic Archaeology w
Externí odkaz:
http://arxiv.org/abs/2011.02505
Autor:
Sharma, Sanjib, Hayden, Michael R., Bland-Hawthorn, Joss, Stello, Dennis, Buder, Sven, Zinn, Joel C., Kallinger, Thomas, Asplund, Martin, De Silva, Gayandhi M., Dorazi, Valentina, Freeman, Ken, Kos, Janez, Lewis, Geraint F., Lin, Jane, Lind, Karin, Martell, Sarah, Simpson, Jeffrey D., Wittenmyer, Rob A., Zucker, Daniel B., Zwitter, Tomaz, Chen, Boquan, Cotar, Klemen, Esdaile, James, Hon, Marc, Horner, Jonathan, Huber, Daniel, Kafle, Prajwal R., Khanna, Shourya, Ting, Yuan-sen, Nataf, David M., Nordlander, Thomas, Saadon, Mohd Hafiz Mohd, Tinney, C. G., Traven, Gregor, Watson, Fred, Wright, Duncan, Wyse, Rosemary F. G.
We explore the fundamental relations governing the radial and vertical velocity dispersions of stars in the Milky Way, from combined studies of complementary surveys including GALAH, LAMOST, APOGEE, the NASA $Kepler$ and K2 missions, and $Gaia$ DR2.
Externí odkaz:
http://arxiv.org/abs/2004.06556
Autor:
Sharma, Sanjib, Stello, Dennis, Bland-Hawthorn, Joss, Hayden, Michael R., Zinn, Joel C., Kallinger, Thomas, Hon, Marc, Asplund, Martin, Buder, Sven, De Silva, Gayandhi M., D'Orazi, Valentina, Freeman, Ken, Kos, Janez, Lewis, Geraint F., Lin, Jane, Lind, Karin, Martell, Sarah, Simpson, Jeffrey D., Wittenmyer, Rob A., Zucker, Daniel B., Zwitter, Tomaz, Bedding, Timothy R., Chen, Boquan, Cotar, Klemen, Esdaile, James, Horner, Jonathan, Huber, Daniel, Kafle, Prajwal R., Khanna, Shourya, Li, Tanda, Ting, Yuan-Sen, Nataf, David M., Nordlander, Thomas, Saddon, Hafiz, Traven, Gregor, Wright, Duncan, Wyse, Rosemary F. G.
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:
http://arxiv.org/abs/1904.12444
Autor:
Wan, Zhen, Kafle, Prajwal R., Lewis, Geraint F., Mackey, Dougal, Sharma, Sanjib, Ibata, Rodrigo A.
The stars within our Galactic halo presents a snapshot of its ongoing growth and evolution, probing galaxy formation directly. Here, we present our first analysis of the stellar halo from detailed maps of Blue Horizontal Branch (BHB) stars drawn from
Externí odkaz:
http://arxiv.org/abs/1807.03664
Autor:
Khanna, Shourya, Sharma, Sanjib, Bland-Hawthorn, Joss, Hayden, Michael, Nataf, David M., Ting, Yuan-Sen, Kos, Janez, Martell, Sarah, Zwitter, Tomaz, De Silva, Gayandhi, Asplund, Martin, Buder, Sven, Duong, Ly, Lin, Jane, Simpson, Jeffrey D., Anguiano, Borja, Horner, Jonathan, Kafle, Prajwal R., Lewis, Geraint F., Nordlander, Thomas, Wyse, Rosemary F. G., Wittenmyer, Robert A., Zucker, Daniel B.
If the Galaxy is axisymmetric and in dynamical equilibrium, we expect negligible fluctuations in the residual line-of-sight velocity field. Recent results using the \apg{} survey find significant fluctuations in velocity for stars in the midplane ($|
Externí odkaz:
http://arxiv.org/abs/1804.07217
Autor:
Gao, Xudong, Lind, Karin, Amarsi, Anish M., Buder, Sven, Dotter, Aaron, Nordlander, Thomas, Asplund, Martin, Bland-Hawthorn, Joss, De Silva, Gayandhi M., D'Orazi, Valentina, Duong, Ly, Freeman, Ken C., Kos, Janez, Lewis, Geraint F., Lin, Jane, Martell, Sarah L., Schlesinger, Katharine. J., Sharma, Sanjib, Simpson, Jeffrey D., Zucker, Daniel B., Zwitter, Tomaz, Da Costa, Gary, Anguiano, Borja, Horner, Jonathan, Hyde, Elaina A., Kafle, Prajwal R., Nataf, David M., Reid, Warren, Stello, Dennis, Ting, Yuan-Sen, collaboration, the GALAH
Open cluster members are coeval and share the same initial bulk chemical compositions. Consequently, differences in surface abundances between members of a cluster that are at different evolutionary stages can be used to study the effects of mixing a
Externí odkaz:
http://arxiv.org/abs/1804.06394
Autor:
Zwitter, Tomaž, Kos, Janez, Chiavassa, Andrea, Buder, Sven, Traven, Gregor, Čotar, Klemen, Lin, Jane, Asplund, Martin, Bland-Hawthorn, Joss, Casey, Andrew R., De Silva, Gayandhi, Duong, Ly, Freeman, Kenneth C., Lind, Karin, Martell, Sarah, D'Orazi, Valentina, Schlesinger, Katharine J., Simpson, Jeffrey D., Sharma, Sanjib, Zucker, Daniel B., Anguiano, Borja, Casagrande, Luca, Collet, Remo, Horner, Jonathan, Ireland, Michael J., Kafle, Prajwal R., Lewis, Geraint, Munari, Ulisse, Nataf, David M., Ness, Melissa, Nordlander, Thomas, Stello, Dennis, Ting, Yuan-Sen, Tinney, Chris G., Watson, Fred, Wittenmyer, Rob A., Žerjal, Maruša
Publikováno v:
2018MNRAS.481..645Z
GALAH is a large-scale magnitude-limited southern stellar spectroscopic survey. Its second data release (GALAH DR2) provides values of stellar parameters and abundances of 23 elements for 342,682 stars (Buder et al.). Here we add a description of the
Externí odkaz:
http://arxiv.org/abs/1804.06344
Autor:
Simpson, Jeffrey D., Stello, Dennis, Sharma, Sanjib, Ting, Yuan-Sen, Nataf, David M., Da Costa, Gary, Wittenmyer, Robert A., Horner, Jonathan, Martell, Sarah L., Lewis, Geraint F., De Silva, Gayandhi M., Cottrell, Peter L., Asplund, Martin, Bland-Hawthorn, Joss, Buder, Sven, D'Orazi, Valentina, Duong, Ly, Freeman, Ken C., Kos, Janez, Lin, Jane, Lind, Karin, Schlesinger, Katharine. J., Zucker, Daniel B., Zwitter, Tomaž, Kafle, Prajwal R., Khanna, Shourya, Nordlander, Thomas
We report the serendipitous observations of 571 luminous supergiants in the Magellanic Clouds by the spectroscopic GALAH and TESS-HERMES surveys: 434 stars in the Large Magellanic Cloud and 137 in the Small Magellanic Cloud. We also find one star tha
Externí odkaz:
http://arxiv.org/abs/1804.05900
Autor:
Simpson, Jeffrey D., Martell, Sarah L., Da Costa, Gary, Casey, Andrew R., Freeman, Ken C., Horner, Jonathan, Ting, Yuan-Sen, Nataf, David M., Lewis, Geraint F., Ness, Melissa K., Zucker, Daniel B., Cottrell, Peter L., Čotar, Klemen, Asplund, Martin, Bland-Hawthorn, Joss, Buder, Sven, D'Orazi, Valentina, De Silva, Gayandhi M., Duong, Ly, Kos, Janez, Lin, Jane, Lind, Karin, Schlesinger, Katharine J., Sharma, Sanjib, Zwitter, Tomaž, Kafle, Prajwal R., Nordlander, Thomas
We present a study using the second data release of the GALAH survey of stellar parameters and elemental abundances of 15 pairs of stars identified by Oh et al 2017. They identified these pairs as potentially co-moving pairs using proper motions and
Externí odkaz:
http://arxiv.org/abs/1804.05894