Zobrazeno 1 - 10
of 13 549
pro vyhledávání: '"A. Martell"'
Autor:
Bragaglia, A., D'Orazi, V., Magrini, L., Baratella, M., Bensby, T., Martell, S., Randich, S., Tautvaisiene, G., Alfaro, E. J., Morbidelli, L., Smiljanic, R., Zaggia, S.
Context: The light element (anti-)correlations shown by globular clusters (GCs) are the main spectroscopic signature of multiple stellar populations. These internal abundance variations provide us with fundamental constraints on the formation mechani
Externí odkaz:
http://arxiv.org/abs/2406.07022
Autor:
D'Orazi, Valentina, Storm, Nicholas, Casey, Andrew R., Braga, Vittorio F., Zocchi, Alice, Bono, Giuseppe, Fabrizio, Michele, Sneden, Christopher, Massari, Davide, Giribaldi, Riano E., Bergemann, Maria, Campbell, Simon W., Casagrande, Luca, de Grijs, Richard, De Silva, Gayandhi, Lugaro, Maria, Zucker, Daniel B., Bragaglia, Angela, Feuillet, Diane, Fiorentino, Giuliana, Chaboyer, Brian, Dall'Ora, Massimo, Marengo, Massimo, Martínez-Vázquez, Clara E., Matsunaga, Noriyuki, Monelli, Matteo, Mullen, Joseph P., Nataf, David, Tantalo, Maria, Thevenin, Frederic, Vitello, Fabio R., Kudritzki, Rolf-Peter, Bland-Hawthorn, Joss, Buder, Sven, Freeman, Ken, Kos, Janez, Lewis, Geraint F., Lind, Karin, Martell, Sarah, Sharma, Sanjib, Stello, Dennis, Zwitter, Tomaž
Stellar mergers and accretion events have been crucial in shaping the evolution of the Milky Way (MW). These events have been dynamically identified and chemically characterised using red giants and main-sequence stars. RR Lyrae (RRL) variables can p
Externí odkaz:
http://arxiv.org/abs/2405.04580
Autor:
Ong, J. M. Joel, Hon, Marc Teng Yen, Soares-Furtado, Melinda, Stephan, Alexander P., van Saders, Jennifer, Tayar, Jamie, Shappee, Benjamin, Hey, Daniel R., Cao, Lyra, Yıldız, Mutlu, Orhan, Zeynep Çelik, Örtel, Sibel, Montet, Benjamin, Holoien, Thomas W. -S., Bland-Hawthorn, Joss, Buder, Sven, De Silva, Gayandhi M., Freeman, Ken C., Martell, Sarah L., Lewis, Geraint F., Sharma, Sanjib, Stello, Dennis
We report the discovery and characterisation of TIC 350842552 ("Zvrk"), an apparently isolated, rapidly-rotating ($P_\text{rot} \sim 99\ \mathrm{d}$) red giant observed by TESS in its Southern Continuous Viewing Zone. The star's fast surface rotation
Externí odkaz:
http://arxiv.org/abs/2402.16971
Autor:
Bailey, Jeremy, Howarth, Ian D., Cotton, Daniel V., Kedziora-Chudczer, Lucyna, De Horta, Ain, Martell, Sarah L., Eldridge, Colin, Luckas, Paul
We present time-series linear-polarization observations of the bright O4 supergiant $\zeta$ Puppis. The star is found to show polarization variation on timescales of around an hour and longer. Many of the observations were obtained contemporaneously
Externí odkaz:
http://arxiv.org/abs/2402.13383
Autor:
Beeson, Kevin L., Kos, Janez, de Grijs, Richard, Martell, Sarah L., Bunder, Sven, Traven, Gregor, Lewis, Geraint F., Zafar, Tayyaba, Bland-Hawthorn, Joss, Freeman, Ken C., Hayden, Michael, Sharma, Sanjib, De Silva, Gayandhi M.
The ability to measure precise and accurate stellar effective temperatures ($T_{\rm{eff}}$) and surface gravities ($\log(g)$) is essential in determining accurate and precise abundances of chemical elements in stars. Measuring $\log(g)$ from isochron
Externí odkaz:
http://arxiv.org/abs/2402.07748
Autor:
Wang, Ella Xi, Nordlander, Thomas, Buder, Sven, Ciucă, Ioana, Soen, Alexander, Martell, Sarah, Ness, Melissa, Lind, Karin, McKenzie, Madeleine, Stello, Dennis
Lithium's susceptibility to burning in stellar interiors makes it an invaluable tracer for delineating the evolutionary pathways of stars, offering insights into the processes governing their development. Observationally, the complex Li production an
Externí odkaz:
http://arxiv.org/abs/2402.02669
Autor:
Restall, Brendon S., Haven, Nathaniel J. M., Martell, Matthew T., Cikaluk, Brendyn D., Tejay, Saymon, Adam, Benjamin A., Stendra, Gopinath, Li, Xingyu, Zemp, Roger J.
Optical imaging of metabolism can provide key information about health and disease progression in cells and tissues, however, current methods have lacked gold-standard information about histological structure. Conversely, histology and virtual histol
Externí odkaz:
http://arxiv.org/abs/2401.15135
Autor:
Banks, Kirsten A., Martell, Sarah L., Tinney, C. G., Stello, Dennis, Hon, Marc, Reyes, Claudia, Priest, James, Buder, Sven, Montet, Benjamin T.
Although red clump stars function as reliable standard candles, their surface characteristics (i.e. $T_\text{eff}$, $\log g$, and [Fe/H]) overlap with those of red giant branch stars, which are not standard candles. Recent results have revealed that
Externí odkaz:
http://arxiv.org/abs/2401.13235
Autor:
Martell, Matthew, Terry, Nick, Sengupta, Ribhu, Salazar, Chris, Errett, Nicole A., Miles, Scott B., Wartman, Joseph, Choe, Youngjun
Street View Images (SVI) are a common source of valuable data for researchers. Researchers have used SVI data for estimating pedestrian volumes, demographic surveillance, and to better understand built and natural environments in cityscapes. However,
Externí odkaz:
http://arxiv.org/abs/2401.13087
Autor:
Usman, Sam A., Ji, Alexander P., Li, Ting S., Pace, Andrew B., Cullinane, Lara R., Da Costa, Gary S., Koposov, Sergey E., Lewis, Geraint F., Zucker, Daniel B., Belokurov, Vasily, Bland-Hawthorn, Joss, Ferguson, Peter S., Hansen, Terese T., Limberg, Guilherme, Martell, Sarah L., McKenzie, Madeleine, Simon, Joshua D.
Milky Way globular clusters (GCs) display chemical enrichment in a phenomenon called multiple stellar populations (MSPs). While the enrichment mechanism is not fully understood, there is a correlation between a cluster's mass and the fraction of enri
Externí odkaz:
http://arxiv.org/abs/2401.02476