Search Publications
A Multi-wavelength 3D Model of BD+30°3639
Freeman, M. J.; Kastner, Joel H.
We present a 3D multi-wavelength reconstruction of BD+30°3639, one of the best-studied planetary nebulae in the solar neighborhood. BD+30°3639, which hosts a [WR]-type central star, has been imaged at wavelength regimes that span the electromagnetic spectrum, from radio to X-rays. We have used the astrophysical modeling software SHAPE to construct…
After the Interaction: an Efficiently Star-forming Molecular Disk in NGC 5195
Aalto, Susanne; Nyland, Kristina; Gallagher, John S. +4 more
We present new molecular gas maps of NGC 5195 (alternatively known as M51b) from the Combined Array for Research in Millimeter Astronomy, including 12CO(1-0), 13CO(1-0), CN(1{}{0,2}-{0}{0,1}), CS(2-1), and 3 mm continuum. We also detected HCN(1-0) and HCO+(1-0) using the Onsala Space Observato…
Mass wasting on Phobos triggered by an evolving tidal environment
Shi, X.; Oberst, J.; Willner, K.
The Martian moon Phobos is experiencing orbital decay, increasing tidal forces, and possible disruption in the near future. We suggest that this changing dynamic tidal environment has contributed to resurfacing of the odd-shaped small moon. We investigated mass wasting features in craters using high-resolution images acquired by the Mars Express o…
Detailed photometric analysis of young star groups in the galaxy NGC 300
Baume, G.; Rodríguez, M. J.; Feinstein, C.
Aims: The purpose of this work is to understand the global characteristics of the stellar populations in NGC 300. In particular, we focused our attention on searching young star groups and study their hierarchical organization. The proximity and orientation of this Sculptor Group galaxy make it an ideal candidate for this study.
Methods:…
The environment of the γ-ray emitting SNR G338.3-0.0: a hadronic interpretation for HESS J1640-465
Castelletti, G.; Supan, L.; Supanitsky, A. D.
The supernova remnant (SNR) G338.3-0.0 spatially correlates with HESS J1640-465, which is considered the most luminous γ-ray source associated with a SNR in our Galaxy. The X-ray pulsar PSR J1640-4631 has been recently discovered within the SNR shell, which could favor a leptonic origin for the detected very-high-energy (VHE) emission. In spite of…
Far-infrared photometric observations of the outer planets and satellites with Herschel-PACS
Feuchtgruber, H.; Balog, Z.; Müller, T. G. +5 more
We present all Herschel-PACS photometer observations of
Deep Optical Observations of Unusual Neutron Star Calvera with the GTC
Shibanov, Yury; Danilenko, Andrey; Zharikov, Sergey +2 more
Calvera is an unusual, isolated neutron star with a pure thermal X-ray spectrum typical of central compact objects in supernova remnants. On the other hand, its rotation period and spin-down rate are typical of ordinary rotation-powered pulsars. It was discovered and studied through X-rays, and has not yet been detected in other spectral domains. …
Spectroscopy at the Solar Limb: II. Are Spicules Heated to Coronal Temperatures?
Rezaei, R.; Puschmann, K. G.; Beck, C. +1 more
Spicules of the so-called type II were suggested to be relevant for coronal heating because of their ubiquity on the solar surface and their eventual extension into the corona. We investigate whether solar spicules are heated to transition-region or coronal temperatures and reach coronal heights (≫6 Mm) using multiwavelength observations of limb s…
DBI Galileon inflation in the light of Planck 2015
Sravan Kumar, K.; Bueno Sánchez, Juan C.; Escamilla-Rivera, Celia +2 more
In this work we consider a DBI Galileon (DBIG) inflationary model and constrain its parameter space with the Planck 2015 and BICEP2/Keck array and Planck (BKP) joint analysis data by means of a potential independent analysis. We focus our attention on inflationary solutions characterized by a constant or varying sound speed as well as warp factor.…
The ISW effect and the lack of large-angle CMB temperature correlations
Starkman, Glenn D.; Copi, Craig J.; O'Dwyer, Márcio
It is by now well established that the magnitude of the two-point angular-correlation function of the cosmic microwave background temperature anisotropies is anomalously low for angular separations greater than about 60°. Physics explanations of this anomaly typically focus on the properties of the Universe at the surface of last scattering, relyi…