Zobrazeno 1 - 10
of 345
pro vyhledávání: '"NIDEVER, DAVID L."'
Autor:
Sakowska, Joanna D., Noël, Noelia E. D., Ruiz-Lara, Tomás, Gallart, Carme, Massana, Pol, Nidever, David L., Cassisi, Santi, Correa-Amaro, Patricio, Choi, Yumi, Besla, Gurtina, Erkal, Denis, Martínez-Delgado, David, Monelli, Matteo, Olsen, Knut A. G., Stringfellow, Guy S.
We obtain a quantitative star formation history (SFH) of a shell-like structure ('shell') located in the northeastern part of the Small Magellanic Cloud (SMC). We use the Survey of the MAgellanic Stellar History (SMASH) to derive colour-magnitude dia
Externí odkaz:
http://arxiv.org/abs/2407.13876
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
Autor:
Povick, Joshua T., Nidever, David L., Massana, Pol, Majewski, Steven R., Yuxi, Lu, Cioni, Maria-Rosa L., Geisler, Doug, Mészáros, Szabolcs, Nitschelm, Christian, Almeida, Andrés, Lane, Richard R., Longa-Peña, Penélope
We determine radial- and age-abundance gradients of the Small Magellanic Cloud (SMC) using spectra of 2,062 red giant branch (RGB) field stars observed by SDSS-IV / APOGEE-2S. With coverage out to $\sim$9 kpc in the SMC, these data taken with the hig
Externí odkaz:
http://arxiv.org/abs/2310.14299
Autor:
Povick, Joshua T., Nidever, David L., Majewski, Steven R., Geisler, Doug, Cioni, Maria-Rosa L., Yuxi, Lu, Muñoz, Ricardo, Stringfellow, Guy S., Almeida, Andrés, Longa-Peña, Penélope, Lane, Richard R., Roman-Lopes, Alexandre
We present the abundance gradients of the Large Magellanic Cloud (LMC) for 25 elemental abundance ratios and their respective temporal evolution as well as age-[X/Fe] trends using 6130 LMC field red giant branch (RGB) stars observed by SDSS-IV / APOG
Externí odkaz:
http://arxiv.org/abs/2309.12503
Autor:
Almeida, Andres, Majewski, Steven R., Nidever, David L., Olsen, Knut A. G., Monachesi, Antonela, Kallivayalil, Nitya, Hasselquist, Sten, Choi, Yumi, Povick, Joshua T., Wilson, John C., Geisler, Doug, Lane, Richard R., Nitschelm, Christian, Sobeck, Jennifer S., Stringfellow, Guy S.
The Magellanic Cloud system represents a unique laboratory for study of both interacting dwarf galaxies and the ongoing process of the formation of the Milky Way and its halo. We focus on one aspect of this complex, 3 body interaction - the dynamical
Externí odkaz:
http://arxiv.org/abs/2308.13631
Autor:
Nidever, David L.
I report the discovery of a stellar stream (Sutlej) using Gaia DR3 proper motions and XP metallicities located ~15 degrees north of the Small Magellanic Cloud (SMC). The stream is composed of two parallel linear components ("branches") approximately
Externí odkaz:
http://arxiv.org/abs/2308.05156
In this paper, we analyse the metallicity structure of the Magellanic Clouds using parameters derived from the Gaia DR3 low-resolution XP spectra, astrometry and photometry. We find that the qualitative behavior of the radial metallicity gradients in
Externí odkaz:
http://arxiv.org/abs/2307.14342
Autor:
Imig, Julie, Price, Cathryn, Holtzman, Jon A., Stone-Martinez, Alexander, Majewski, Steven R., Weinberg, David H., Johnson, Jennifer A., Prieto, Carlos Allende, Beaton, Rachael L., Beers, Timothy C., Bizyaev, Dmitry, Blanton, Michael R., Brownstein, Joel R., Cunha, Katia, Fernández-Trincado, José G., Feuillet, Diane K., Hasselquist, Sten, Hayes, Christian R., Jönsson, Henrik, Lane, Richard R., Lian, Jianhui, Mészáros, Szabolcs, Nidever, David L., Robin, Annie C., Shetrone, Matthew, Smith, Verne, Wilson, John C.
Publikováno v:
ApJ 954 124 (2023)
We present new maps of the Milky Way disk showing the distribution of metallicity ([Fe/H]), $\alpha$-element abundances ([Mg/Fe]), and stellar age, using a sample of 66,496 red giant stars from the final data release (DR17) of the Apache Point Observ
Externí odkaz:
http://arxiv.org/abs/2307.13887
Autor:
Garver, Bethany R., Nidever, David L., Debattista, Victor P., Silva, Leandro Beraldo e, Khachaturyants, Tigran
The Milky Way stellar disk has both a thin and a thick component. The thin disk is composed mostly of younger stars ($\lesssim$8 Gyr) with a lower abundance of $\alpha$ elements, while the thick disk contains predominantly older stars ($\gtrsim$8--12
Externí odkaz:
http://arxiv.org/abs/2306.12388
Autor:
Dey, Arjun, Najita, Joan, Filion, Carrie, Han, Jiwon Jesse, Pearson, Sarah, Wyse, Rosemary, Thob, Adrien C. R., Anguiano, Borja, Apfel, Miranda, Arnaboldi, Magda, Bell, Eric F., Silva, Leandro Beraldo e, Besla, Gurtina, Bhattacharya, Aparajito, Bhattacharya, Souradeep, Chandra, Vedant, Choi, Yumi, Collins, Michelle L. M., Cunningham, Emily C., Dalcanton, Julianne J., Escala, Ivanna, Foote, Hayden R., Ferguson, Annette M. N., Gibson, Benjamin J., Gnedin, Oleg Y., Guhathakurta, Puragra, Hawkins, Keith, Horta, Danny, Ibata, Rodrigo, Kallivayalil, Nitya, Koch, Eric W., Koposov, Sergey, Lewis, Geraint F., Macri, Lucas, McKinnon, Kevin A., Nidever, David L., Olsen, Knut A. G., Patel, Ekta, Petersen, Michael S., Petric, Andreea, Price-Whelan, Adrian M., Rich, R. Michael, Riley, Alexander H., Saha, Abhijit, Sanderson, Robyn E., Sharma, Sanjib, Sohn, Sangmo Tony, Soraisam, Monika D., Steinmetz, Matthias, Valluri, Monica, Vivas, A. Katherina, Williams, Benjamin F., Wojno, J. Leigh
As our nearest large neighbor, the Andromeda Galaxy provides a unique laboratory for investigating galaxy formation and the distribution and substructure properties of dark matter in a Milky Way-like galaxy. Here, we propose an initial 2-epoch ($\Del
Externí odkaz:
http://arxiv.org/abs/2306.12302