Science Archives Publication System

Hub-filament System in IRAS 05480+2545: Young Stellar Cluster and 6.7 GHz Methanol Maser

DOI: 10.3847/1538-4357/aa79a5 Bibcode: 2017ApJ...844...15D

Dewangan, L. K.; Ojha, D. K.; Baug, T.

To probe the star formation (SF) process, we present a multi-wavelength study of IRAS 05480+2545 (hereafter I05480+2545). Analysis of Herschel data reveals a massive clump (M _clump ∼ 1875 {M}_⊙; peak N(H₂) ∼ 4.8 × 10²² cm^-2 A _V ∼ 51 mag) containing the 6.7 GHz methanol maser and I…

2017 • The Astrophysical Journal

Herschel 22

Cassini ISS observation of Saturn's north polar vortex and comparison to the south polar vortex

DOI: 10.1016/j.icarus.2016.12.011 Bibcode: 2017Icar..285...68S

Dyudina, Ulyana A.; Ingersoll, Andrew P.; Ewald, Shawn P. +2 more

We present analyses of Saturn's north pole using high-resolution images captured in late 2012 by the Cassini spacecraft's Imaging Science Subsystem (ISS) camera. The images reveal the presence of an intense cyclonic vortex centered at the north pole. In the red and green visible continuum wavelengths, the north polar region exhibits a cyclonically…

2017 • Icarus

Cassini 22

Neptune long-lived atmospheric features in 2013-2015 from small (28-cm) to large (10-m) telescopes

DOI: 10.1016/j.icarus.2017.06.009 Bibcode: 2017Icar..295...89H

Hueso, R.; Sánchez-Lavega, A.; Rojas, J. F. +32 more

Since 2013, observations of Neptune with small telescopes (28-50 cm) have resulted in several detections of long-lived bright atmospheric features that have also been observed by large telescopes such as Keck II or Hubble. The combination of both types of images allows the study of the long-term evolution of major cloud systems in the planet. In 2…

2017 • Icarus

eHST 22

Distances of cataclysmic variables and related objects derived from Gaia Data Release 1

DOI: 10.1051/0004-6361/201730679 Bibcode: 2017A&A...604A.107R

Ramsay, Gavin; Wheatley, Peter J.; Gänsicke, Boris T. +1 more

We consider the parallaxes of sixteen cataclysmic variables and related objects that are included in the TGAS catalogue, which is part of the Gaia first data release, and compared these with previous parallax measurements. The parallax of the dwarf nova SS Cyg is consistent with the parallax determination made using the VLBI, but with only one of …

2017 • Astronomy and Astrophysics

Gaia 22

Planck satellite constraints on pseudo-Nambu-Goldstone boson quintessence

DOI: 10.1088/1475-7516/2017/01/023 Bibcode: 2017JCAP...01..023S

Liddle, Andrew R.; Smer-Barreto, Vanessa

The pseudo-Nambu-Goldstone Boson (PNGB) potential, defined through the amplitude M⁴ and width f of its characteristic potential V(phi) = M⁴[1 + cos(phi/f)], is one of the best-suited models for the study of thawing quintessence. We analyse its present observational constraints by direct numerical solution of the scalar field …

2017 • Journal of Cosmology and Astroparticle Physics

Planck 22

Galactic cold cores. VIII. Filament formation and evolution: Filament properties in context with evolutionary models

DOI: 10.1051/0004-6361/201628552 Bibcode: 2017A&A...601A..94R

Bernard, J. -P.; Juvela, M.; Marshall, D. J. +15 more

Context. The onset of star formation is intimately linked with the presence of massive unstable filamentary structures. These filaments are therefore key for theoretical models that aim to reproduce the observed characteristics of the star formation process in the Galaxy.
Aims: As part of the filament study carried out by the Herschel Galacti…

2017 • Astronomy and Astrophysics

Herschel 22

A systematic X-ray study of the dwarf novae observed with Suzaku

DOI: 10.1093/pasj/psw114 Bibcode: 2017PASJ...69...10W

Tsujimoto, Masahiro; Hayashi, Takayuki; Wada, Qazuya +1 more

X-ray behavior of the dwarf novae (DNe) outside the quiescent state has not been fully understood. We thus assembled 21 data sets of the 15 DNe observed by the Suzaku satellite by the end of 2013, which include spectra taken during not only the quiescence, but also the transitional, outburst, and super-outburst states. Starting with the traditiona…

2017 • Publications of the Astronomical Society of Japan

Suzaku 22

Outflows of hot molecular gas in ultra-luminous infrared galaxies mapped with VLT-SINFONI

DOI: 10.1051/0004-6361/201731508 Bibcode: 2017A&A...607A.116E

Colina, L.; Arribas, S.; Pereira-Santaella, M. +5 more

We present the detection and morphological characterization of hot molecular gas outflows in nearby ultra-luminous infrared galaxies (ULIRGs), using the Spectrograph for Integral Field Observations in the Near Infrared (SINFONI) on the Very Large Telescope (VLT). We detect outflows observed in the 2.12 µm H₂ 1-0 S(1) line for thre…

2017 • Astronomy and Astrophysics

eHST 22

Searching for γ-ray signature in WHSP blazars. Fermi-LAT detection of 150 excess signal in the 0.3-500 GeV band

DOI: 10.1051/0004-6361/201628691 Bibcode: 2017A&A...598A.134A

Chang, Y. -L.; Arsioli, B.

Aims: A direct search of γ-ray emission centered on multifrequency selected candidates is a valuable complementary approach to the standard search adopted in current γ-ray Fermi-LAT catalogs. Our sources are part of the 2WHSP sample that was assembled with the aim of providing targets for Imaging Atmospheric Cherenkov Telescopes (IACT). A lik…

2017 • Astronomy and Astrophysics

XMM-Newton 22

X-Ray Emission from the Nuclear Region of Arp 220

DOI: 10.3847/1538-4357/aa713b Bibcode: 2017ApJ...841...44P

Elvis, Martin; Risaliti, Guido; Karovska, Margarita +6 more

We present an imaging and spectral analysis of the nuclear region of the ultraluminous infrared galaxy merger of Arp 220, using deep Chandra-ACIS observations summing up to ∼ 300 {{ks}}. Narrowband imaging with subpixel resolution of the innermost nuclear region reveals two distinct Fe-K emitting sources, coincident with the infrared and radio nuc…

2017 • The Astrophysical Journal

XMM-Newton 22