The Galaxy Zoo survey for giant AGN-ionized clouds: past and present black-hole accretion events by Keel, W, Chojnowski, S, Bennert, V, Schawinski, K, Lintott, C, Lynn, S, Pancoast, A, Harris, C, Nierenberg, A, Sonnenfeld, A, Proctor, R

“…Motivated by the discovery of the spectacular nebula known as Hanny's Voorwerp, ionized by a powerful AGN which has apparently faded dramatically within ~ 100,000 years, Galaxy Zoo volunteers have carried out both targeted and serendipitous searches for similar emission-line clouds around low-redshift galaxies.We present the resulting list of candidates and describe spectroscopy identifying 19 galaxies with AGN-ionized regions at projected radii > 10 kpc. …”

Modeling Chondrule Dust Rim Growth with Ellipsoidal Monomers by C. Xiang, A. Carballido, L. S. Matthews, T. W. Hyde

“…Fine-grained dust rims (FGRs) surrounding chondrules in carbonaceous chondrites encode important information about early processes in the solar nebula. Here, we investigate the effect of the nebular environment on FGR porosity, dust size distribution, and grain alignment, comparing the results for rims comprised of ellipsoidal and spherical grains. …”
Get full text

Formation of nickel–iron meteorites by chemical fluid transport by Werner Schrön

“…The study shows that octahedrites, hexahedrites and ataxites formed as a result of the transport of metal chlorides and fluorides (CFT) during accretion within the solar nebula. Siderophile elements are characterized by the similarities in their chemical transport properties. …”
Get full text

Searching for Galactic H ii Regions from the LAMOST Database Based on the Multihead WDCNN Model by Mengxin Wang, Jingjing Wu, Bin Jiang, Yanxia Zhang

“…A H ii region is a kind of emission nebula, and more definite samples of H ii regions can help study the formation and evolution of galaxies. …”
Get full text

The Influence of Cold Jupiters in the Formation of Close-in Planets. I. Planetesimal Transport by Marcy Best, Antranik A. Sefilian, Cristobal Petrovich

“…This observation may simply be a result of an enhanced initial reservoir of solids in the nebula required to form a CJ or a yet-to-be-determined mechanism assisted by the presence of the CJ. …”
Get full text

Mechanical Modification of Chondrule Fine-grained Rims by Dusty Nebular Shocks by Augusto Carballido, Lorin S. Matthews, Romy D. Hanna, Truell W. Hyde

“…Given the presence of shocks in protoplanetary disks, we use numerical simulations to test the hypothesis that dust-laden shocks in the solar nebula contributed to FGR modification. We use the iSALE2D shock physics code to model the collision of dusty nebular shock fronts (which we term “dust clouds”) into chondrule surfaces that host a porous FGR. …”
Get full text

Atomic Data Assessment with PyNeb by Christophe Morisset, Valentina Luridiana, Jorge García-Rojas, Verónica Gómez-Llanos, Manuel Bautista, Claudio Mendoza

“…PyNeb is a Python package widely used to model emission lines in gaseous nebulae. We take advantage of its object-oriented architecture, class methods, and historical atomic database to structure a practical environment for atomic data assessment. …”
Get full text

ALMA Observations of the Extraordinary Carina Pillars: A Complementary Sample by Geovanni Cortes-Rangel, Luis A. Zapata, Pedro R. Rivera-Ortiz, Megan Reiter, Satoko Takahashi, Josep M. Masqué

“…We present a study of six dusty and gaseous pillars (containing the Herbig–Haro (HH) objects HH 1004 and HH 1010) and globules (that contain the HH 666, HH 900, HH 1006, and HH 1066 objects) localized in the Carina Nebula using sensitive and high-angular-resolution (∼0.″3) Atacama Large Millimeter/submillimeter Array observations. …”
Get full text

Hitomi Constraints on the 3.5 keV Line in the Perseus Galaxy Cluster by Bulbul, Gul E, Miller, Eric D, Bautz, Marshall W.

“…We do find a hint of a broad excess near the energies of high-n transitions of S xvi E 3.44 ≃ keV rest-frame)—a possible signature of charge exchange in the molecular nebula and another proposed explanation for the unidentified line. …”
Get full text
Get full text

Magnetic Fields Recorded by Chondrules Formed in Nebular Shocks by Mai, Chuhong, Desch, Steven J., Boley, Aaron C., Weiss, Benjamin P.

“…An outstanding question is whether the inferred paleofields represent the background magnetic field of the solar nebula or were unique to the chondrule-forming environment. …”
Get full text
Get full text

Implications of Philae Magnetometry Measurements at Comet 67P/Churyumov-Gerasimenko for the Nebular Field of the Outer Solar System by Biersteker, John B., Weiss, Benjamin P., Heinisch, Philip, Hercik, David, Glassmeier, Karl-Heinz, Auster, Hans-Ulrich

“…If 67P formed during the lifetime of the solar nebula and has not undergone significant subsequent collisional or aqueous alteration, this very low specific magnetization is inconsistent with its formation from the gentle gravitational collapse of a cloud of millimeter-sized pebbles in a background magnetic field 3 μT. …”
Get full text

Paleomagnetic evidence for a partially differentiated ordinary chondrite parent asteroid by Bryson, James F J, Weiss, B. P., Getzin, B., Abrahams, Jacob N. H., Nimmo, Francis, Scholl, A.

“…These properties are inconsistent with external field sources such as the nebula, solar wind, or impacts, but are consistent with dynamo-generated fields, indicating that the H chondrite parent body contained an advecting metallic core and was therefore partially differentiated. …”
Get full text

TESTS OF IN SITU FORMATION SCENARIOS FOR COMPACT MULTIPLANET SYSTEMS by Schlaufman, Kevin C

“…I rederive the scaling of giant planet occurrence with metallicity as P[subscript gp] = 0.05[+0.02 over -0.02] X 10[superscript (2.1 ± 0.4)[M/H]] = 0.08[+0.02 over -0.03] X 10[superscript (2.3 ± 0.4)[Fe/H]] and show that there is significant tension between the frequency of giant planets suggested by the minimum mass extrasolar nebula scenario and the observational upper limits. …”
Get full text
Get full text

Development of MKID Instrumentation for exoplanet direct imaging by Dodkins, R

“…</p> <p>Finally, I present on-sky results of planetary nebula NGC 6751 taken with the ARCONS MKID instrument at Palomar. …”

The thallium isotope composition of carbonaceous chondrites - New evidence for live ²⁰⁵Pb in the early solar system by Baker, R, Schönbächler, M, Rehkämper, M, Williams, H, Halliday, A

“…Previous ⁵³Mn-⁵³Cr and ¹⁰⁷Pd-¹⁰⁷Ag studies of bulk carbonaceous chondrites provided evidence that the Pb-Tl isochron records volatile fractionation in the solar nebula at close to 4567 Ma. The isochron thus yields the initial ²⁰⁵Pb abundance and Tl isotope composition of the solar system, with values of ²⁰⁵Pb/²⁰⁴Pbss.o = (1.0±0.4) x 10⁻³ and ε²⁰⁵Tss.o = -7.6±2.1, respectively. …”

The thallium isotope composition of carbonaceous chondrites - New evidence for live Pb-205 in the early solar system by Baker, R, Schonbachler, M, Rehkamper, M, Williams, H, Halliday, A

“…Previous 53Mn-53Cr and 107Pd-107Ag studies of bulk carbonaceous chondrites provide evidence that the Pb-Tl isochron records volatile fractionation in the solar nebula at close to 4567 Ma. The isochron thus yields the initial 205Pb abundance and Tl isotope composition of the solar system, with values of 205Pb/204PbSS,0 = (1.0 ± 0.4) × 10- 3 and ε205TlSS,0 = - 7.6 ± 2.1, respectively. …”

Isotope fractionation during volatile loss from planets and asteroids by Van Der Waal, ARW

“…The 50% condensation temperature is often used to describe volatility in planetary sciences, but the restriction to solar nebula conditions hinders its applicability beyond the first ~3 Myr of the solar system.…”

Non-chondritic magnesium and the origins of the inner terrestrial planets by Wiechert, U, Halliday, A

“…In this model chondrule-like objects separate from volatile rich planetary dust by accumulation in stagnant regions between eddies in the solar nebula. Small (∼ 1 km) planetesimals formed by accumulation of such molten material then develop into planetary embryos and thence to larger terrestrial planets by combinations of runaway growth and collisions. …”

Formation of nickel–iron meteorites by chemical fluid transport by Werner Schrön

“…The study shows that octahedrites, hexahedrites and ataxites formed as a result of the transport of metal chlorides and fluorides (CFT) during accretion within the solar nebula. Siderophile elements are characterized by the similarities in their chemical transport properties. …”
Get full text

Formation of nickel–iron meteorites by chemical fluid transport by Werner Schrön

“…The study shows that octahedrites, hexahedrites and ataxites formed as a result of the transport of metal chlorides and fluorides (CFT) during accretion within the solar nebula. Siderophile elements are characterized by the similarities in their chemical transport properties. …”
Get full text