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Showing 1–12 of 12 results
Advanced filters: Author: Charlie Conroy Clear advanced filters

  • Han, Conroy and Hernquist propose a solution to an old problem: the origin of the warp in the Galactic disk. Adopting a dark halo model that is tilted with respect to the disk, the authors reproduce the warp and flare of the disk in the observed direction and magnitude.

    • Jiwon Jesse Han
    • Charlie Conroy
    • Lars Hernquist
    Research
    Nature Astronomy
    Volume: 7, P: 1481-1485

  • The stellar initial mass function describes the mass distribution of stars at the time of their formation. This study reports observations of the Na I doublet and the Wing-Ford molecular FeH band in the spectra of elliptical galaxies. These lines are strong in stars with masses <0.3 solar masses and weak or absent in all other types of stars. The direct detection of the light of low-mass stars implies that they are very abundant in elliptical galaxies, making up >80% of the total number of stars and contributing >60% of the total stellar mass.

    • Pieter G. van Dokkum
    • Charlie Conroy
    Research
    Nature
    Volume: 468, P: 940-942

  • The number of long-period variable stars in a stellar population is directly related to their lifetime, which is difficult to predict from first principles; here a time-dependent stellar population model is constructed that includes the effects of long-period variable stars, and is applied to the galaxy M87.

    • Charlie Conroy
    • Pieter G. van Dokkum
    • Jieun Choi
    Research
    Nature
    Volume: 527, P: 488-491

  • Bob Kurucz, a giant in the field of stellar spectral modelling, was committed to sharing his science and expertise with the community.

    • Andrea Dupree
    • Charlie Conroy
    Comments & Opinion
    Nature Astronomy
    Volume: 9, P: 618

  • The ratio of magnesium to iron abundance is measured for a massive quiescent galaxy at a redshift of 2.1, corresponding to when the Universe was three billion years old.

    • Mariska Kriek
    • Charlie Conroy
    • Bahram Mobasher
    Research
    Nature
    Volume: 540, P: 248-251

  • A rare perfect alignment between two galaxies in the young Universe has been captured by the James Webb Space Telescope. The further (z ≈ 3) galaxy is curved into an Einstein ring due to the bending of space around the nearer (z ≈ 2) galaxy, which is massive and compact—representative of the pristine core of a present-day galaxy.

    • Pieter van Dokkum
    • Gabriel Brammer
    • Charlie Conroy
    ResearchOpen Access
    Nature Astronomy
    Volume: 8, P: 119-125

  • Observations of ZTF SLRN-2020, a short-lived optical outburst in the Galactic disk accompanied by bright, long-lived infrared emission, show that the resulting light curve and spectra are consistent with the signatures of a planet being engulfed by its host star.

    • Kishalay De
    • Morgan MacLeod
    • Andrew Vanderburg
    Research
    Nature
    Volume: 617, P: 55-60

  • The dark-matter-free dwarf galaxies DF2 and DF4 in the NGC 1052 group probably formed together in the aftermath of a single bullet-dwarf collision around eight billion years ago.

    • Pieter van Dokkum
    • Zili Shen
    • Aaron Romanowsky
    ResearchOpen Access
    Nature
    Volume: 605, P: 435-439

  • Galaxies normally have far more dark matter than normal matter, but the dynamics of objects within the ultra-diffuse galaxy NGC1052–DF2 suggest that it has a very little dark matter component.

    • Pieter van Dokkum
    • Shany Danieli
    • Jielai Zhang
    Research
    Nature
    Volume: 555, P: 629-632