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The Pipe Nebula as seen with Herschel: formation of filamentary structures by large-scale compression?
Hill, T.; White, G. J.; Roussel, H. +20 more
A growing body of evidence indicates that the formation of filaments in interstellar clouds is a key component of the star formation process. In this paper, we present new Herschel-PACS and SPIRE observations of the B59 and Stem regions in the Pipe Nebula complex, revealing a rich, organized network of filaments. The asymmetric column density prof…
The evolving slope of the stellar mass function at 0.6 ≤ z < 4.5 from deep WFC3 data
Fiore, F.; Castellano, M.; Pentericci, L. +12 more
We used Early Release Science (ERS) observations taken with the Wide Field Camera 3 (WFC3) in the GOODS-S field to study the galaxy stellar mass function (GSMF) at 0.6 ≤ z < 4.5. Deep WFC3 near-IR data (for Y as faint as 27.3, J and H as faint as 27.4 AB mag at 5σ), as well as deep KS (as faint as 25.5 at 5σ) Hawk-I band data, provid…
Deep Absorption Line Studies of Quiescent Galaxies at z ~ 2: The Dynamical-mass-Size Relation and First Constraints on the Fundamental Plane
Grillo, C.; Toft, S.; Zibetti, S. +4 more
We present dynamical and structural scaling relations of quiescent galaxies at z = 2, including the dynamical-mass-size relation and the first constraints on the fundamental plane (FP). The backbone of the analysis is a new, very deep Very Large Telescope/X-shooter spectrum of a massive, compact, quiescent galaxy at z = 2.0389. We detect the conti…
High-velocity Outflows without AGN Feedback: Eddington-limited Star Formation in Compact Massive Galaxies
Moustakas, John; Coil, Alison L.; Rudnick, Gregory H. +5 more
We present the discovery of compact, obscured star formation in galaxies at z ~ 0.6 that exhibit >~ 1000 km s-1 outflows. Using optical morphologies from the Hubble Space Telescope and infrared photometry from the Wide-field Infrared Survey Explorer, we estimate star formation rate (SFR) surface densities that approach ΣSFR
Molecular abundances in the inner layers of IRC +10216
Cernicharo, J.; Daniel, F.; Kahane, C. +3 more
Context. The inner layers of circumstellar envelopes around asymptotic giant branch stars are sites where a variety of processes such as thermochemical equilibrium, shocks induced by the stellar pulsation, and condensation of dust grains determine the chemical composition of the material that is expelled into the outer envelope layers and, ultimat…
Dynamical Measurements of Black Hole Masses in Four Brightest Cluster Galaxies at 100 Mpc
Ma, Chung-Pei; Graham, James R.; Gebhardt, Karl +5 more
We present stellar kinematics and orbit superposition models for the central regions of four brightest cluster galaxies, based upon integral-field spectroscopy at Gemini, Keck, and McDonald Observatories. Our integral-field data span radii from <100 pc to tens of kiloparsecs, comparable to the effective radius of each galaxy. We report black ho…
Panchromatic Observations of SN 2011dh Point to a Compact Progenitor Star
Sakamoto, T.; Zhang, X.; Cline, T. +32 more
We report the discovery and detailed monitoring of X-ray emission associated with the Type IIb SN 2011dh using data from the Swift and Chandra satellites, placing it among the best-studied X-ray supernovae (SNe) to date. We further present millimeter and radio data obtained with the Submillimeter Array, the Combined Array for Research in Millimete…
Constraints on cosmological models from strong gravitational lensing systems
Cao, Shuo; Biesiada, Marek; Zhu, Zong-Hong +2 more
Strong lensing has developed into an important astrophysical tool for probing both cosmology and galaxies (their structure, formation, and evolution). Using the gravitational lensing theory and cluster mass distribution model, we try to collect a relatively complete observational data concerning the Hubble constant independent ratio between two an…
The Star Formation History and Metal Content of the Green Peas. New Detailed GTC-OSIRIS Spectrophotometry of Three Galaxies
Amorín, R.; Pérez-Montero, E.; Vílchez, J. M. +1 more
We present deep broadband imaging and long-slit spectroscopy of three compact, low-mass starburst galaxies at redshift z ~ 0.2-0.3, also referred to as Green Peas (GP). We measure physical properties of the ionized gas and derive abundances for several species with high precision. We find that the three GPs display relatively low extinction, low o…
99 Herculis: host to a circumbinary polar-ring debris disc
Duchêne, G.; Wyatt, M. C.; Matthews, B. C. +6 more
We present resolved Herschel images of a circumbinary debris disc in the 99 Herculis system. The primary is a late F-type star. The binary orbit is well characterized and we conclude that the disc is misaligned with the binary plane. Two different models can explain the observed structure. The first model is a ring of polar orbits that move in a p…