activity
20202026
most citedThe Eighteenth Data Release of the Sloan Digital Sky Surveys: Targeting and First Spectra from SDSS-V

282 citations · 1.1k across the 58 of their papers we have counts for

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Showing 2022Show all

7 papers · 1 filter

astro-ph.GA2022★ 31 cited

Distant Echoes of the Milky Way's Last Major Merger

Vedant Chandra, Rohan P. Naidu, Charlie Conroy +9

The majority of the Milky Way's stellar halo consists of debris from our Galaxy's last major merger, the Gaia-Sausage-Enceladus (GSE). In the past few years, stars from GSE have be…

astro-ph.GA2022★ 123 cited

The Poor Old Heart of the Milky Way

Hans-Walter Rix, Vedant Chandra, René Andrae +9

Massive disk galaxies like our Milky Way should host an ancient, metal-poor, and centrally concentrated stellar population. This population reflects the star formation and enrichme…

astro-ph.GA2022★ 62 cited

The Stellar Halo of the Galaxy is Tilted & Doubly Broken

Jiwon Jesse Han, Charlie Conroy, Benjamin D. Johnson +7

Modern Galactic surveys have revealed an ancient merger that dominates the stellar halo of our Galaxy (\textit{Gaia}-Sausage-Enceladus, GSE). Using chemical abundances and kinemati…

astro-ph.GA2022★ 6 cited

A Ghost in Boötes: The Least Luminous Disrupted Dwarf Galaxy

Vedant Chandra, Charlie Conroy, Nelson Caldwell +9

We report the discovery of Specter, a disrupted ultrafaint dwarf galaxy revealed by the H3 Spectroscopic Survey. We detected this structure via a pair of comoving metal-poor stars…

astro-ph.GA2022★ 8 cited

Live Fast, Die -Enhanced: The Mass-Metallicity- Relation of the Milky Way's Disrupted Dwarf Galaxies

Rohan P. Naidu, Charlie Conroy, Ana Bonaca +9

The Milky Way's satellite galaxies ("surviving dwarfs") have been studied for decades as unique probes of chemical evolution in the low-mass regime. Here we extend such studies to…

astro-ph.GA2022★ 38 cited

Birth of the Galactic Disk Revealed by the H3 Survey

Charlie Conroy, David H. Weinberg, Rohan P. Naidu +12

We use chemistry ([alpha/Fe] and [Fe/H]), main sequence turnoff ages, and kinematics determined from H3 Survey spectroscopy and Gaia astrometry to identify the birth of the Galacti…

astro-ph.GA2022

A Tilt in the Dark Matter Halo of the Galaxy

Jiwon Jesse Han, Rohan P. Naidu, Charlie Conroy +9

Recent observations of the stellar halo have uncovered the debris of an ancient merger, Gaia-Sausage-Enceladus, estimated to have occurred ~8 Gyr ago. Follow-up studies have associ…