Science Archives Publication System

Micron-sized forsterite grains in the pre-planetary nebula of IRAS 17150-3224. Searching for clues to the mysterious evolution of massive AGB stars

DOI: 10.1051/0004-6361/201424843 Bibcode: 2015A&A...576A..98D

Waters, L. B. F. M.; Blommaert, J. A. D. L.; Min, M. +3 more

Aims: We study the grain properties and location of the forsterite crystals in the circumstellar environment of the pre-planetary nebula (PPN) IRAS 17150-3224 in order to learn more about the as yet poorly understood evolutionary phase prior to the PPN.
Methods: We use the best-fit model for IRAS 17150-3224 of Meixner et al. (2002, ApJ, …

2015 • Astronomy and Astrophysics

Herschel ISO 12

Strategy to minimize dust foregrounds in B -mode searches

DOI: 10.1103/PhysRevD.91.081303 Bibcode: 2015PhRvD..91h1303K

Kovetz, Ely D.; Kamionkowski, Marc

The Planck satellite has identified several patches of sky with low polarized dust emission, obvious targets for searches for the cosmic microwave background B -mode signal from inflationary gravitational waves. Still, given the Planck measurement uncertainties, the polarized dust foregrounds in these different candidate patches may differ by an o…

2015 • Physical Review D

Planck 12

Anomalous Earth flybys of spacecraft

DOI: 10.1007/s10509-015-2413-5 Bibcode: 2015Ap&SS.358...18W

Wilhelm, Klaus; Dwivedi, Bhola N.

A small deviation from the 1/r potential is expected for the gravitational interaction of extended bodies. It is explained as a consequence of a recently proposed gravitational impact model (Wilhelm et al. in Astrophy…

2015 • Astrophysics and Space Science

Rosetta 12

Far-infrared CO and H₂O emission in intermediate-mass protostars

DOI: 10.1051/0004-6361/201526021 Bibcode: 2015A&A...578A..20M

Karska, A.; Fuente, A.; Kristensen, L. E. +4 more

Context. Intermediate-mass young stellar objects (YSOs) provide a link to understanding how feedback from shocks and UV radiation scales from low- to high-mass star forming regions.
Aims: Our aim is to analyze excitation of CO and H₂O in deeply embedded intermediate-mass YSOs and compare it with similar studies on low-mass and high…

2015 • Astronomy and Astrophysics

Herschel 12

Modelling of the surface emission of the low magnetic field magnetar SGR 0418+5729

DOI: 10.1093/mnras/stv1535 Bibcode: 2015MNRAS.452.3357G

Rea, N.; Perna, R.; Guillot, S. +2 more

We perform a detailed modelling of the post-outburst surface emission of the low magnetic field magnetar SGR 0418+5729. The dipolar magnetic field of this source, B=6 {× 10^{12}}{ G} estimated from its spin-down rate, is in the observed range of magnetic fields for normal pulsars. The source is further characterized by a high pulse fraction and a …

2015 • Monthly Notices of the Royal Astronomical Society

XMM-Newton 12

The velocity distribution in the solar neighbourhood from the LAMOST pilot survey

DOI: 10.1093/mnras/stu2620 Bibcode: 2015MNRAS.447.2367X

Zhang, Yong; Xu, Yan; Mao, Shude +5 more

We use about 15 000 F/G nearby dwarf stars selected from the LAMOST pilot survey to map the U-V velocity distribution in the solar neighbourhood. An extreme deconvolution algorithm is applied to reconstruct an empirical multi-Gaussian model. In addition to the well-known substructures, e.g. Sirius, Coma Berenices, Hyades-Pleiades overdensities, se…

2015 • Monthly Notices of the Royal Astronomical Society

Hipparcos 12

Satellite content and quenching of star formation in galaxy groups at z ~ 1.8

DOI: 10.1051/0004-6361/201526274 Bibcode: 2015A&A...581A..56G

Finoguenov, A.; Daddi, E.; Le Floc'h, E. +13 more

We study the properties of satellites in the environment of massive star-forming galaxies at z ~ 1.8 in the COSMOS field, using a sample of 215 galaxies on the main sequence of star formation with an average mass of ~10¹¹M_⊙. At z> 1.5, these galaxies typically trace halos of mass ≳10¹³M_⊙. We use optic…

2015 • Astronomy and Astrophysics

XMM-Newton 12

Inflection point inflation and dark energy in supergravity

DOI: 10.1103/PhysRevD.91.123502 Bibcode: 2015PhRvD..91l3502G

Guo, Zong-Kuan; Gao, Tie-Jun

We consider an inflection point inflationary model in supergravity with a single chiral superfield and show that the predicted values of the scalar spectral index and tensor-to-scalar ratio are consistent with the Planck 2015 results. In this model supersymmetry is strongly broken after inflation, which results in a non-supersymmetry de Sitter vac…

2015 • Physical Review D

Planck 12

To what extent can intracrater layered deposits that lack clear sedimentary textures be used to infer depositional environments?

DOI: 10.1016/j.icarus.2014.11.004 Bibcode: 2015Icar..248..526C

Kah, Linda C.; Cadieux, Sarah B.

Craters within Arabia Terra, Mars, contain hundreds of meters of layered strata showing systematic alternation between slope- and cliff-forming units, suggesting either rhythmic deposition of distinct lithologies or similar lithologies that experienced differential cementation. On Earth, rhythmically deposited strata can be examined in terms of st…

2015 • Icarus

MEx 12

Spectral models for early time SN 2011fe observations

DOI: 10.1093/mnras/stv1951 Bibcode: 2015MNRAS.454.2549B

Gal-Yam, A.; Wang, L.; Sullivan, M. +12 more

We use observed UV through near-IR spectra to examine whether SN 2011fe can be understood in the framework of Branch-normal Type Ia supernovae (SNe Ia) and to examine its individual peculiarities. As a benchmark, we use a delayed-detonation model with a progenitor metallicity of Z_⊙/20. We study the sensitivity of features to variations …

2015 • Monthly Notices of the Royal Astronomical Society

eHST 12