Zobrazeno 1 - 10
of 288
pro vyhledávání: '"Čotar, P."'
State-of-the-art performance in QA tasks is currently achieved by systems employing Large Language Models (LLMs), however these models tend to hallucinate information in their responses. One approach focuses on enhancing the generation process by inc
Externí odkaz:
http://arxiv.org/abs/2404.10513
Autor:
Buchholz, Simon, Cotar, Codina
We consider random gradient fields with disorder where the interaction potential $V_e$ on an edge $e$ can be expressed as $e^{-V_e(s)} = \int \rho(\mathrm{d}\kappa)\, e^{-\kappa \xi_e} e^{-\frac{\kappa s^2}{2}}$. Here $\rho$ denotes a measure with co
Externí odkaz:
http://arxiv.org/abs/2309.12799
Autor:
Vogrinčič, Rok, Kos, Janez, Zwitter, Tomaž, Traven, Gregor, Beeson, Kevin L., Čotar, Klemen, Munari, Ulisse, Buder, Sven, Martell, Sarah L., Lewis, Geraint F., De Silva, Gayandhi M, Hayden, Michael R., Bland-Hawthorn, Joss, D'Orazi, Valentina
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:
http://arxiv.org/abs/2303.14016
Autor:
Munari, U., Traven, G., Masetti, N., Valisa, P., Righetti, G. -L., Hambsch, F. -J., Frigo, A., Cotar, K., De Silva, G. M., Freeman, K. C., Lewis, G. F., Martell, S. L., Sharma, S., Simpson, J. D., Ting, Y. -S., Wittenmyer, R. A., Zucker, D. B.
We have identified a first group of 33 new candidates for symbiotic stars (SySt) of the accreting-only variety among the 600,255 stars so far observed by the GALAH high-resolution spectroscopic survey of the Southern Hemisphere, more than doubling th
Externí odkaz:
http://arxiv.org/abs/2104.02686
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