Zobrazeno 1 - 10
of 302
pro vyhledávání: '"Ness , Melissa"'
Autor:
Bhattarai, Binod, Loebman, Sarah R., Ness, Melissa K., Wetzel, Andrew, Cunningham, Emily C., Parul, Hanna, Wiggins, Alessa Ibrahim
Open star clusters are the essential building blocks of the Galactic disk; "strong chemical tagging" - the premise that all star clusters can be reconstructed given chemistry information alone - is a driving force behind many current and upcoming lar
Externí odkaz:
http://arxiv.org/abs/2408.02228
Precise spectroscopic classification of planet hosts is an important tool of exoplanet research at both the population and individual system level. In the era of large-scale surveys, data-driven methods offer an efficient approach to spectroscopic cl
Externí odkaz:
http://arxiv.org/abs/2407.19016
Autor:
Ness, Melissa K., Mendel, J. Trevor, Buder, Sven, Wheeler, Adam, Ji, Alexander P., Mijnarends, Luka, Venn, Kim, Starkenburg, Else, Leaman, Ryan, Grasha, Kathryn, Aquilina, Sarah
The element abundances of local group galaxies connect enrichment mechanisms to galactic properties and serve to contextualise the Milky Way's abundance distributions. Individual stellar spectra in nearby galaxies can be extracted from Integral Field
Externí odkaz:
http://arxiv.org/abs/2407.17661
Autor:
Rix, Hans-Walter, Chandra, Vedant, Zasowski, Gail, Pillepich, Annalisa, Khoperskov, Sergey, Feltzing, Sofia, Wyse, Rosemary F., Frankel, Neige, Horta, Danny, Kollmeier, Juna, Stassun, Keivan G., Ness, Melissa, Bird, Jonathan C., Nidever, David L., Fernandez, Jose G., Amarante, João A., Laporte, Chervin F., Lian, Jianhui
We show with Gaia XP spectroscopy that extremely metal-rich stars in the Milky Way (EMR; $[M/H]_{XP} > 0.5$) - but only those - are largely confined to a tight "knot" at the center of the Galaxy. This EMR knot is round in projection, has a fairly abr
Externí odkaz:
http://arxiv.org/abs/2406.01706
Reconstructing the mass assembly history of the Milky Way relies on obtaining detailed measurements of the properties of many stars in the Galaxy, especially in the stellar halo. One of the most constraining quantities is stellar age, as it can shed
Externí odkaz:
http://arxiv.org/abs/2403.09777
The first generations of stars left their chemical fingerprints on metal-poor stars in the Milky Way and its surrounding dwarf galaxies. While instantaneous and homogeneous enrichment implies that groups of co-natal stars should have the same element
Externí odkaz:
http://arxiv.org/abs/2403.04833
The elemental abundances of stars, particularly the refractory elements (e.g., Fe, Si, Mg), play an important role in connecting stars to their planets. Most Sun-like stars do not have refractory abundance measurements since obtaining a large sample
Externí odkaz:
http://arxiv.org/abs/2402.16954
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:
Horta, Danny, Price-Whelan, Adrian M., Hogg, David W., Johnston, Kathryn V., Widrow, Lawrence, Dalcanton, Julianne J., Ness, Melissa K., Hunt, Jason A. S.
Under the assumption of a simple and time-invariant gravitational potential, many Galactic dynamics techniques infer the Milky Way's mass and dark matter distribution from stellar kinematic observations. These methods typically rely on parameterized
Externí odkaz:
http://arxiv.org/abs/2312.07664
Autor:
Manea, Catherine, Hawkins, Keith, Ness, Melissa K., Buder, Sven, Martell, Sarah L., Zucker, Daniel B.
The observed chemical diversity of Milky Way stars places important constraints on Galactic chemical evolution and the mixing processes that operate within the interstellar medium. Recent works have found that the chemical diversity of disk stars is
Externí odkaz:
http://arxiv.org/abs/2310.15257