Science Archives Publication System

Ground calibrations of the Solar Intensity X-ray Spectrometer (SIXS) on board BepiColombo

DOI: 10.1016/j.nima.2013.10.006 Bibcode: 2014NIMPA.735..496L

Andersson, H.; Alha, L.; Huovelin, J. +4 more

In this paper we present the methods, results, and analysis of the BepiColombo SIXS instruments' ground calibrations. The aim of these calibrations was to characterize the performance of the three SIXS X-ray detectors to enable reliable spectral analysis of the solar X-ray data. The ground calibrations for characterizing the performance of the thr…

2014 • Nuclear Instruments and Methods in Physics Research A

SMART-1 2

Constraints on dark matter annihilation and its equation of state after Planck data

DOI: 10.1142/S0217732314400045 Bibcode: 2014MPLA...2940004X

Xu, Lixin

In this paper, the annihilation of dark matter (DM) f_dɛ₀ with nonzero equation of state (EoS) w_dm was studied by using the currently available cosmic observations which include geometric and dynamic measurements. The constrained results show they are anti-correlated and are w dm = 0.000390_{-0.000753<…}

2014 • Modern Physics Letters A

Planck 2

The CMB derivatives of Planck's beam asymmetry

DOI: 10.1093/mnras/stu1214 Bibcode: 2014MNRAS.443..750R

Rathaus, Ben; Kovetz, Ely D.

We investigate the anisotropy in cosmic microwave background Planck maps due to the coupling between its beam asymmetry and uneven scanning strategy. Introducing a pixel space estimator based on the temperature gradients, we find a highly significant (∼20σ) preference for these to point along ecliptic latitudes. We examine the scale dependence, mo…

2014 • Monthly Notices of the Royal Astronomical Society

Planck 2

Discovering a misaligned CO outflow related to the red MSX source G034.5964-01.0292

DOI: 10.1051/0004-6361/201423693 Bibcode: 2014A&A...567A..99P

Rubio, M.; Ortega, M. E.; Paron, S. +1 more

Aims: The red MSX source G034.5964-01.0292 (MSXG34), catalogued as a massive young stellar object, was observed in molecular lines with the aim of discovering and studying molecular outflows.
Methods: We mapped a region of 3'× 3' centred at MSXG34 using the Atacama Submillimeter Telescope Experiment in the ¹²CO J = 3-2 and HCO…

2014 • Astronomy and Astrophysics

Herschel 2

Verification of the Spectral Classification of Stars Using the Hipparcos Catalogue

DOI: 10.1017/pasa.2014.41 Bibcode: 2014PASA...31...46D

Deb, D.; Chakraborty, P.

The spectral classifications of the stars from spectral data have been corrected from time to time and new spectral and luminosity classes have been assigned. Identifying stars with wrong spectral and luminosity classification has been a stupendous task from the huge catalogue of stars. In this work we describe a simple statistical technique to id…

2014 • Publications of the Astronomical Society of Australia

Hipparcos 1

Interplanetary Field Enhancements: The Interaction between Solar Wind and Interplanetary Dusty Plasma Released by Interplanetary Collisions

Bibcode: 2014PhDT........37L

Lai, Hairong

Interplanetary field enhancements (IFEs) are unique large-scale structures in the solar wind. During IFEs, the magnetic-field strength is significantly enhanced with little perturbation in the solar-wind plasma. Early studies showed that IFEs move at nearly the solar-wind speed and some IFEs detected at 0.72AU by Pioneer Venus Orbiter (PVO) are as…

2014 • Ph.D. Thesis

VenusExpress 1

A study of the relation between intensity oscillations and magnetic field parameters in a sunspot: Hinode observations

DOI: 10.1088/1674-4527/14/11/009 Bibcode: 2014RAA....14.1458R

Venkatakrishnan, P.; Kumar, Brajesh; Mathew, Shibu K. +2 more

We present properties of intensity oscillations of a sunspot in the photosphere and chromosphere using G band and Ca II H filtergrams from Hinode. Intensity power maps as function of magnetic field strength and frequency reveal reduction of power in the G band with an increase in photospheric magnetic field strength at all frequencies. In Ca II H,…

2014 • Research in Astronomy and Astrophysics

Hinode 1

Discovery of an overlapping cluster in the Abell 1674 field with Suzaku

DOI: 10.1093/pasj/psu044 Bibcode: 2014PASJ...66...71I

Koyama, Katsuji; Hayashida, Kiyoshi; Akamatsu, Hiroki +5 more

We present the results of a Suzaku observation of Abell 1674, an optically very rich (richness class 3) cluster cataloged as z = 0.1066. We discover the He-like Fe K-shell line from the central region for the first time, and find that the X-ray spectrum yields a high redshift of 0.215^{+0.007}_{-0.006}. On the other hand, the spectrum of the south…

2014 • Publications of the Astronomical Society of Japan

Suzaku 1

Ultraviolet Spectroscopic Study of BY Circini and V 1425 Aquilae from IUE Satellite

DOI: 10.1007/s12036-014-9313-x Bibcode: 2014JApA...35..715S

Sanad, M. R.

We present the ultraviolet spectra of two classical novae, BY Circini 1995 and V1425 Aquilae 1995, using observations obtained with the International Ultraviolet Explorer (IUE). The outflow velocity of the ionized ejecta was calculated to be 2100–2700 km s^‑1 and 1600–1900 km s^‑1 (FWHM) for BY Cir and V1425 Aql, respectively. …

2014 • Journal of Astrophysics and Astronomy

IUE 1

Is Planck data consistent with primordial deuterium measurements?

DOI: 10.1103/PhysRevD.90.103514 Bibcode: 2014PhRvD..90j3514S

Melchiorri, Alessandro; Salvati, Laura; Said, Najla

The recent measurements of the cosmic microwave background anisotropies provided by the Planck satellite experiment have significantly improved the constraints on several cosmological parameters. In this brief paper we point out a small but interesting tension present between recent values of the primordial deuterium measured from quasar absorptio…

2014 • Physical Review D

Planck 1