Results 91 to 100 of about 692 (185)

Tracing Back a Second-generation Star Stripped from Terzan 5 by the Galactic Bar

The Astrophysical Journal Letters
The Galactic bulge hosts the Milky Way’s oldest stars, possibly coming from disrupted globular clusters (GCs) or the bulge’s primordial building blocks, making these stars witnesses to the Galaxy’s early chemical enrichment.
Stefano O. Souza, Marica Valentini, Cristina Chiappini, Angeles Pérez-Villegas, Josefina Montalbán, Diego Bossini, Beatriz Barbuy, Yvonne Elsworth, Rafael A. Garcia   +8 more
doaj   +1 more source

Where are the Population III Star Relics in the Simulated Milky Way Analogs?

The Astrophysical Journal
Using six Milky Way analogs with two different numerical resolutions from the Auriga simulation, we investigate the total mass, spatial distribution, and kinematics of the Population III (Pop III) star relics in the Milky Way analogs at z = 0.
Hang Yang, Liang Gao, Qi Guo, Haining Li, Shi Shao, Gang Zhao   +5 more
doaj   +1 more source

A time-resolved picture of our Milky Way's early formation history. [PDF]

Nature, 2022
Xiang M, Rix HW.
europepmc   +1 more source

Galactic Archaeology: Current Surveys

, 2016
14 pages, 5 figures. Invited review, proceedings of the conference 'Multi-Object Spectroscopy in the Next Decade' held in La Palma, March 2015, to be published in ASP Conference Series (editors Ian Skillen, Marc Balcells & Scott Trager)
openaire   +2 more sources

A Detailed Chemical Analysis of the Red Giant Orbiting Gaia BH3: From Lithium to Thorium

The Astrophysical Journal
Preliminary astrometric data from the fourth data release of the Gaia mission revealed a 33 M _⊙ dark companion to a metal-poor red giant star, deemed Gaia BH3.
Zoe Hackshaw, Keith Hawkins, Catherine Manea   +2 more
doaj   +1 more source

Predicting the geographic distribution of ancient Amazonian archaeological sites with machine learning. [PDF]

PeerJ, 2023
Walker RS, Ferguson JR, Olmeda A, Hamilton MJ, Elghammer J, Buchanan B.   +5 more
europepmc   +1 more source

RR Lyrae Stars Belonging to the Candidate Globular Cluster Patchick 99

The Astrophysical Journal Letters
Patchick 99 is a candidate globular cluster located in the direction of the Galactic bulge, with a proper motion almost identical to the field and extreme field star contamination. A recent analysis suggests it is a low-luminosity globular cluster with a
Evan Butler, Andrea Kunder, Zdenek Prudil, Kevin R. Covey, Macy Ball, Carlos Campos, Kaylen Gollnick, Julio Olivares Carvajal, Joanne Hughes, Kathryn Devine, Christian I. Johnson, A. Katherina Vivas, R. Michael Rich, Meridith Joyce, Iulia T. Simion, Tommaso Marchetti, Andreas J. Koch-Hansen, William I. Clarkson, Rebekah Kuss   +18 more
doaj   +1 more source

How precisely can we measure the ages of subgiant and giant stars?

The Open Journal of Astrophysics
Precise stellar ages are fundamental to Galactic archaeology. However, obtaining reliable age estimates and uncertainties for field stars has been a long-standing challenge.
Cheyanne Shariat, Kareem El-Badry, Soumyadeep Bhattacharjee   +2 more
doaj   +1 more source

Composition of Giants 1° North of the Galactic Center: Detailed Abundance Trends for 21 Elements Observed with IGRINS

The Astrophysical Journal
We report the first high-resolution, detailed abundances of 21 elements for giants in the Galactic bulge/bar within 1° of the Galactic plane, where high extinction has rendered such studies challenging. Our high-signal-to-noise-ratio and high-resolution,
Govind Nandakumar, Nils Ryde, Gregory Mace, Kyle F. Kaplan, Niels Nieuwmunster, Daniel Jaffe, R. Michael Rich, Mathias Schultheis, Oscar Agertz, Eric Andersson, Christopher Sneden, Emily Strickland, Brian Thorsbro   +12 more
doaj   +1 more source

Detection of early-universe gravitational-wave signatures and fundamental physics. [PDF]

Gen Relativ Gravit, 2022
Caldwell R, Cui Y, Guo HK, Mandic V, Mariotti A, No JM, Ramsey-Musolf MJ, Sakellariadou M, Sinha K, Wang LT, White G, Zhao Y, An H, Bian L, Caprini C, Clesse S, Cline JM, Cusin G, Fornal B, Jinno R, Laurent B, Levi N, Lyu KF, Martinez M, Miller AL, Redigolo D, Scarlata C, Sevrin A, Haghi BSE, Shu J, Siemens X, Steer DA, Sundrum R, Tamarit C, Weir DJ, Xie KP, Yang FW, Zhou S.   +37 more
europepmc   +1 more source