Search Publications
Optical Spectroscopy and Demographics of Redback Millisecond Pulsar Binaries
Strader, Jay; Bahramian, Arash; Cheung, C. C. +12 more
We present the first optical spectroscopy of five confirmed (or strong candidate) redback millisecond pulsar binaries, obtaining complete radial velocity curves for each companion star. The properties of these millisecond pulsar binaries with low-mass, hydrogen-rich companions are discussed in the context of the 14 confirmed and 10 candidate field…
Piercing the Milky Way: an all-sky view of the Orphan Stream
Li, T. S.; Evans, N. W.; Belokurov, V. +14 more
We use astrometry, broad-band photometry, and variability information from the Data Release 2 of ESA's Gaia mission (GDR2) to identify members of the Orphan Stream (OS) across the whole sky. The stream is traced above and below the celestial equator and in both Galactic hemispheres, thus increasing its visible length to ∼210° equivalent to ∼150 kp…
The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters - XIX. A chemical tagging of the multiple stellar populations over the chromosome maps
Anderson, J.; Milone, A. P.; Cordoni, G. +8 more
The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters (GCs) has investigated GCs and their stellar populations. In previous papers of this series we have introduced a pseudo two-colour diagram, or `chromosome map' (ChM) that maximizes the separation between the multiple populations. We have identified two main classes of GCs: T…
Homogeneous photometry - VII. Globular clusters in the Gaia era
Pancino, E.; Sanna, N.; Stetson, P. B. +2 more
We present wide-field, ground-based Johnson-Cousins UBVRI photometry for 48 Galactic globular clusters based on about 90 000 public and proprietary images. The photometry is calibrated with the latest transformations obtained in the framework of our secondary standard project, with typical internal and external uncertainties of order a few millima…
Structure and kinematics of the Taurus star-forming region from Gaia-DR2 and VLBI astrometry
Bouy, H.; Covey, K.; Sarro, L. M. +9 more
Aims: We take advantage of the second data release of the Gaia space mission and the state-of-the-art astrometry delivered from very long baseline interferometry observations to revisit the structure and kinematics of the nearby Taurus star-forming region.
Methods: We apply a hierarchical clustering algorithm for partitioning the stars i…
Model independent H(z) reconstruction using the cosmic inverse distance ladder
Efstathiou, George; Lemos, Pablo; Lee, Elizabeth +1 more
Recent distance ladder determinations of the Hubble constant H0 disagree at about the 3.5σ level with the value determined from Planck measurements of the cosmic microwave background (CMB) assuming a ΛCDM† cosmology. This discrepancy has prompted speculation that new physics might be required beyond that assumed in the ΛCDM m…
Red and dead CANDELS: massive passive galaxies at the dawn of the Universe
Castellano, M.; Pentericci, L.; Santini, P. +7 more
We search the five CANDELS fields (COSMOS, EGS, GOODS-North, GOODS-South, and UDS) for passively evolving a.k.a. `red and dead' massive galaxies in the first 2 Gyr after the big bang, integrating and updating the work on GOODS-South presented in a previous paper. We perform SED-fitting on photometric data, with top-hat star-formation histories to …
Phat ELVIS: The inevitable effect of the Milky Way's disc on its dark matter subhaloes
Bullock, James S.; Kelley, Tyler; Garrison-Kimmel, Shea +3 more
We introduce an extension of the ELVIS project to account for the effects of the Milky Way galaxy on its subhalo population. Our simulation suite, Phat ELVIS, consists of 12 high-resolution cosmological dark matter-only (DMO) zoom simulations of Milky Way-size ΛCDM haloes [Mv = (0.7-2) × 1012 M⊙] along with 12 re-r…
The MUSE-Wide Survey: survey description and first data release
Steinmetz, M.; Diener, C.; Enke, H. +17 more
We present the MUSE-Wide survey, a blind, 3D spectroscopic survey in the CANDELS/GOODS-S and CANDELS/COSMOS regions. The final survey will cover 100 × 1 arcmin2 MUSE fields. Each MUSE-Wide pointing has a depth of one hour and hence targets more extreme and more luminous objects over ten times the area of the MUSE-Deep fields. The legacy…
Two New HATNet Hot Jupiters around A Stars and the First Glimpse at the Occurrence Rate of Hot Jupiters from TESS
Latham, David W.; Narita, N.; Cochran, W. D. +68 more
Wide-field surveys for transiting planets are well suited to searching diverse stellar populations, enabling a better understanding of the link between the properties of planets and their parent stars. We report the discovery of HAT-P-69 b (TOI 625.01) and HAT-P-70 b (TOI 624.01), two new hot Jupiters around A stars from the Hungarian-made Automat…