Science Archives Publication System

MUSE crowded field 3D spectroscopy of over 12 000 stars in the globular cluster NGC 6397. II. Probing the internal dynamics and the presence of a central black hole

DOI: 10.1051/0004-6361/201527065 Bibcode: 2016A&A...588A.149K

Dreizler, S.; Brinchmann, J.; Roth, M. M. +8 more

We present a detailed analysis of the kinematics of the Galactic globular cluster NGC 6397 based on more than ~18 000 spectra obtained with the novel integral field spectrograph MUSE. While NGC 6397 is often considered a core collapse cluster, our analysis suggests a flattening of the surface brightness profil…

2016 • Astronomy and Astrophysics

eHST 83

Hubble Tarantula Treasury Project. III. Photometric Catalog and Resulting Constraints on the Progression of Star Formation in the 30 Doradus Region

DOI: 10.3847/0067-0049/222/1/11 Bibcode: 2016ApJS..222...11S

Panagia, N.; Anderson, J.; Zaritsky, D. +21 more

We present and describe the astro-photometric catalog of more than 800,000 sources found in the Hubble Tarantula Treasury Project (HTTP). HTTP is a Hubble Space Telescope Treasury program designed to image the entire 30 Doradus region down to the sub-solar (∼0.5 M_⊙) mass regime using the Wide Field Camera 3 and the Advanced Camera for S…

2016 • The Astrophysical Journal Supplement Series

eHST 82

Non-LTE Inversions of the Mg II h & k and UV Triplet Lines

DOI: 10.3847/2041-8205/830/2/L30 Bibcode: 2016ApJ...830L..30D

Leenaarts, Jorrit; Asensio Ramos, Andrés; de la Cruz Rodríguez, Jaime

The Mg II h & k lines are powerful diagnostics for studying the solar chromosphere. They have become particularly popular with the launch of the Interface Region Imaging Spectrograph (IRIS) satellite, and a number of studies that include these lines have lead to great progress in understanding chromospheric heating, in many cases thanks to the…

2016 • The Astrophysical Journal

IRIS 82

The Musca cloud: A 6 pc-long velocity-coherent, sonic filament

DOI: 10.1051/0004-6361/201526015 Bibcode: 2016A&A...587A..97H

Alves, J.; Beuther, H.; Tafalla, M. +2 more

Filaments play a central role in the molecular clouds' evolution, but their internal dynamical properties remain poorly characterized. To further explore the physical state of these structures, we have investigated the kinematic properties of the Musca cloud. We have sampled the main axis of this filamentary cloud in ¹³CO and C¹⁸

2016 • Astronomy and Astrophysics

Planck 82

Photolytic Hazes in the Atmosphere of 51 Eri b

DOI: 10.3847/0004-637X/824/2/137 Bibcode: 2016ApJ...824..137Z

Morley, C. V.; Zahnle, K.; Moses, J. I. +1 more

We use a 1D model to address photochemistry and possible haze formation in the irradiated warm Jupiter, 51 Eridani b. The intended focus was to be carbon, but sulfur photochemistry turns out to be important. The case for organic photochemical hazes is intriguing but falls short of being compelling. If organic hazes form, they are likeliest to do s…

2016 • The Astrophysical Journal

IUE 82

Data-driven Radiative Hydrodynamic Modeling of the 2014 March 29 X1.0 Solar Flare

DOI: 10.3847/0004-637X/827/1/38 Bibcode: 2016ApJ...827...38R

Liu, Wei; Allred, Joel C.; Kleint, Lucia +2 more

Spectroscopic observations of solar flares provide critical diagnostics of the physical conditions in the flaring atmosphere. Some key features in observed spectra have not yet been accounted for in existing flare models. Here we report a data-driven simulation of the well-observed X1.0 flare on 2014 March 29 that can reconcile some well-known spe…

2016 • The Astrophysical Journal

IRIS 82

Suprathermal particle energization in dipolarization fronts: Particle-in-cell simulations

DOI: 10.1002/2016JA022815 Bibcode: 2016JGRA..121.9483L

Angelopoulos, V.; Fu, Huishan; Lu, San

Within dipolarization fronts (DFs) in the Earth's magnetotail, significant magnetic energy is converted to plasma energy, and a significant portion of the electrons and ions therein are accelerated to suprathermal energies. The mechanism that produces these suprathermal particles while simultaneously reducing magnetic field energy is poorly unders…

2016 • Journal of Geophysical Research (Space Physics)

Cluster 82

The Characteristics of Solar X-Class Flares and CMEs: A Paradigm for Stellar Superflares and Eruptions?

DOI: 10.1007/s11207-016-0923-0 Bibcode: 2016SoPh..291.1761H

Toriumi, Shin; Guedel, Manuel; Harra, Louise K. +10 more

This paper explores the characteristics of 42 solar X-class flares that were observed between February 2011 and November 2014, with data from the Solar Dynamics Observatory (SDO) and other sources. This flare list includes nine X-class flares that had no associated CMEs. In particular our aim was to determine whether a clear signature could be ide…

2016 • Solar Physics

Hinode SOHO 82

SN Refsdal: Photometry and Time Delay Measurements of the First Einstein Cross Supernova

DOI: 10.3847/0004-637X/820/1/50 Bibcode: 2016ApJ...820...50R

Sharon, K.; Molino, A.; Zitrin, A. +16 more

We present the first year of Hubble Space Telescope imaging of the unique supernova (SN) “Refsdal,” a gravitationally lensed SN at z = 1.488 ± 0.001 with multiple images behind the galaxy cluster MACS J1149.6+2223. The first four observed images of SN Refsdal (images S1-S4) exhibited a slow rise (over ∼150 days) to reach a broad peak brightness ar…

2016 • The Astrophysical Journal

eHST 82

Infrared Color Selection of Massive Galaxies at z > 3

DOI: 10.3847/0004-637X/816/2/84 Bibcode: 2016ApJ...816...84W

Daddi, E.; Elbaz, D.; Shu, X. +29 more

We introduce a new color selection technique to identify high-redshift, massive galaxies that are systematically missed by Lyman-break selection. The new selection is based on the H₁₆₀ (H) and Infrared Array Camera (IRAC) 4.5 µm bands, specifically H-[4.5]\gt 2.25 mag. These galaxies, called “HIEROs,” include two major populations…

2016 • The Astrophysical Journal

eHST 82