Search Publications
PHAT. XIX. The Ancient Star Formation History of the M31 Disk
Bell, Eric F.; Monachesi, Antonela; Dolphin, Andrew E. +7 more
We map the star formation history across M31 by fitting stellar evolution models to color-magnitude diagrams of each 83″ × 83″ (0.3 × 1.4 kpc, deprojected) region of the Panchromatic Hubble Andromeda Treasury (PHAT) survey outside of the innermost 6\prime × 12\prime portion. We find that most of the star formation occurred pr…
The cool-core state of Planck SZ-selected clusters versus X-ray-selected samples: evidence for cool-core bias
Rossetti, M.; Molendi, S.; Gastaldello, F. +4 more
We characterized the population of galaxy clusters detected with the Sunyaev-Zeldovich (SZ) effect with Planck by measuring the cool-core state of the objects in a well-defined subsample of the Planck SZ catalogue. We used as an indicator the concentration parameter. The fraction of cool-core clusters is 29 ± 4 per cent and does not show significa…
The Breakthrough Listen Search for Intelligent Life: Target Selection of Nearby Stars and Galaxies
DeBoer, David; Marcy, Geoffrey W.; Siemion, Andrew P. V. +10 more
We present the target selection for the Breakthrough Listen search for extraterrestrial intelligence during the first year of observations at the Green Bank Telescope, Parkes Telescope, and Automated Planet Finder. On the way to observing 1,000,000 nearby stars in search of technological signals, we present three main sets of objects we plan to ob…
Testing the universality of the star-formation efficiency in dense molecular gas
Braine, J.; André, Ph.; Könyves, V. +7 more
Context. Recent studies with, for example, Spitzer and Herschel have suggested that star formation in dense molecular gas may be governed by essentially the same "law" in Galactic clouds and external galaxies. This conclusion remains controversial, however, in large part because different tracers have been used to probe the mass of dense molecular…
The KMOS Deep Survey (KDS) - I. Dynamical measurements of typical star-forming galaxies at z ≃ 3.5
McLure, R. J.; Dunlop, J. S.; Swinbank, A. M. +7 more
We present dynamical measurements from the KMOS (K-band multi-object spectrograph) Deep Survey (KDS), which comprises 77 typical star-forming galaxies at z ≃ 3.5 in the mass range 9.0 < log (M⋆/M⊙) < 10.5. These measurements constrain the internal dynamics, the intrinsic velocity dispersions (σint) and rotati…
Gaia Data Release 1. Open cluster astrometry: performance, limitations, and future prospects
Prusti, T.; Mazeh, T.; Zucker, S. +589 more
Context. The first Gaia Data Release contains the Tycho-Gaia Astrometric Solution (TGAS). This is a subset of about 2 million stars for which, besides the position and photometry, the proper motion and parallax are calculated using HIPPARCOS and Tycho-2 positions in 1991.25 as prior information.
Aims: We investigate the scientific potential a…
Formation of the young massive cluster R136 triggered by tidally-driven colliding H i flows
Inoue, Tsuyoshi; Tachihara, Kengo; Fukui, Yasuo +4 more
Understanding massive cluster formation is one of the important issues of astronomy. By analyzing the H i data, we have identified that the two H i velocity components (L- and D-components) are colliding toward the H i Ridge, in the southeastern end of the Large Magellanic Cloud (LMC), which hosts the young massive cluster R136 and ∼400 O/Wolf-Ray…
Using Long-term Millisecond Pulsar Timing to Obtain Physical Characteristics of the Bulge Globular Cluster Terzan 5
Cadelano, Mario; Freire, Paulo C. C.; Ransom, Scott M. +4 more
Over the past decade, the discovery of three unique stellar populations and a large number of confirmed pulsars within the globular cluster Terzan 5 has raised questions over its classification. Using the long-term radio pulsar timing of 36 ms pulsars in the cluster core, we provide new measurements of key physical properties of the system. As Ter…
Two new confirmed massive relic galaxies: red nuggets in the present-day Universe
Vazdekis, Alexandre; Trujillo, Ignacio; Balcells, Marc +4 more
We confirm two new local massive relic galaxies, I.e. untouched survivors of the early Universe massive population: Mrk 1216 and PGC 032873. Both show early and peaked formation events within very short time-scales (<1 Gyr) and thus old mean mass-weighted ages (∼13 Gyr). Their star formation histories remain virtually unchanged out to several e…
The KMOS Redshift One Spectroscopic Survey (KROSS): rotational velocities and angular momentum of z ≈ 0.9 galaxies★
Smail, Ian; Jarvis, M. J.; Swinbank, A. M. +12 more
We present dynamical measurements for 586 Hα-detected star-forming galaxies from the KMOS (K-band Multi-Object Spectrograph) Redshift One Spectroscopic Survey (KROSS). The sample represents typical star-forming galaxies at this redshift (z = 0.6-1.0), with a median star formation rate of ≈7 M⊙ yr-1 and a stellar mass range of…