Search Publications
The Great Observatories Origins Deep Survey. VLT/VIMOS spectroscopy in the GOODS-south field: Part II
Popesso, P.; Cesarsky, C.; Dickinson, M. +10 more
Context. We present the full data set of the VIsible Multi-Object Spectrograph (VIMOS) spectroscopic campaign of the ESO/GOODS program in the Chandra Deep Field South (CDFS), which complements the FORS2 ESO/GOODS spectroscopic campaign.
Aims: The ESO/GOODS spectroscopic programs are aimed at reaching signal-to-noise ratios adequate to measure…
Galaxies at z = 6-9 from the WFC3/IR imaging of the Hubble Ultra Deep Field
McLure, R. J.; Dunlop, J. S.; Koekemoer, A. M. +5 more
We present the results of a systematic search for galaxies in the redshift range z = 6-9, within the new, deep, near-infrared (Y, J, H) imaging of the Hubble Ultra Deep Field provided by the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope. We have performed full spectral energy distribution fitting to the optical+infrared photometry of al…
A Spitzer-selected Galaxy Cluster at z = 1.62
Finkelstein, S. L.; Papovich, C.; McLure, R. J. +15 more
We report the discovery of a galaxy cluster at z = 1.62 located in the Spitzer Wide-Area Infrared Extragalactic survey XMM-LSS field. This structure was selected solely as an overdensity of galaxies with red Spitzer/Infrared Array Camera colors, satisfying ([3.6] - [4.5])AB> - 0.1 mag. Photometric redshifts derived from the Subaru XM…
Precise Black Hole Masses from Megamaser Disks: Black Hole-Bulge Relations at Low Mass
Greene, Jenny E.; Kim, Minjin; Peng, Chien Y. +7 more
The black hole (BH)-bulge correlations have greatly influenced the last decade of efforts to understand galaxy evolution. Current knowledge of these correlations is limited predominantly to high BH masses (M BHgsim108 M sun) that can be measured using direct stellar, gas, and maser kinematics. These objects, howeve…
PHAT: PHoto-z Accuracy Testing
Ilbert, O.; Wolf, C.; Abdalla, F. B. +22 more
Context. Photometric redshifts (photo-z's) have become an essential tool in extragalactic astronomy. Many current and upcoming observing programmes require great accuracy of photo-z's to reach their scientific goals.
Aims: Here we introduce PHAT, the PHoto-z Accuracy Testing programme, an international initiative to test and compare different…
Broad iron L line and X-ray reverberation in 1H0707-495
Ponti, G.; Fabian, A. C.; Miller, J. M. +5 more
A detailed analysis of a long XMM-Newton observation of the narrow-line type 1 Seyfert galaxy 1H0707-495 is presented, including spectral fitting, spectral variability and timing studies. The two main features in the spectrum are the drop at ~7keV and a complex excess below 1keV. These are well described by two broad, K and L, iron lines. Alternat…
Variations in the Sun’s Meridional Flow over a Solar Cycle
Hathaway, David H.; Rightmire, Lisa
The Sun’s meridional flow is an axisymmetric flow that is generally directed from its equator toward its poles at the surface. The structure and strength of the meridional flow determine both the strength of the Sun’s polar magnetic field and the intensity of sunspot cycles. We determine the meridional flow speed of magnetic features on the Sun us…
Very Blue UV-Continuum Slope β of Low Luminosity z ~ 7 Galaxies from WFC3/IR: Evidence for Extremely Low Metallicities?
Trenti, M.; Oesch, P. A.; Carollo, C. M. +7 more
We use the ultra-deep WFC3/IR data over the Hubble Ultra Deep Field and the Early Release Science WFC3/IR data over the CDF-South GOODS field to quantify the broadband spectral properties of candidate star-forming galaxies at z ~ 7. We determine the UV-continuum slope β in these galaxies, and compare the slopes with galaxies at later times to meas…
Structure and Morphologies of z ~ 7-8 Galaxies from Ultra-deep WFC3/IR Imaging of the Hubble Ultra-deep Field
Trenti, M.; Oesch, P. A.; Carollo, C. M. +6 more
We present a first morphological study of z ~ 7-8 Lyman break galaxies (LBGs) from Oesch et al. and Bouwens et al. detected in ultra-deep near-infrared imaging of the Hubble Ultra-Deep Field (HUDF) by the HUDF09 program. With an average intrinsic size of 0.7 ± 0.3 kpc, these galaxies are found to be extremely compact, having an average observed su…
The first Herschel view of the mass-SFR link in high-z galaxies
Berta, S.; Magnelli, B.; Nordon, R. +37 more
Aims: We exploit deep observations of the GOODS-N field taken with PACS, the Photodetector Array Camera and Spectrometer, onboard of Herschel, as part of the PACS evolutionary probe guaranteed time (PEP), to study the link between star formation and stellar mass in galaxies to z ~ 2.
Methods: Starting from a stellar mass - selected sampl…