Search Publications

Validation of Spherical Born Approximation Sensitivity Functions for Measuring Deep Solar Meridional Flow
DOI: 10.3847/1538-4357/aa6333 Bibcode: 2017ApJ...838...53B

Roth, Markus; Jackiewicz, Jason; Kholikov, Shukur +1 more

Accurate measurements of deep solar meridional flow are of vital interest for understanding the solar dynamo. In this paper, we validate a recently developed method for obtaining sensitivity functions (kernels) for travel-time measurements to solar interior flows using the Born approximation in spherical geometry, which is expected to be more accu…

2017 The Astrophysical Journal
SOHO 4
A study of ionopause perturbation and associated boundary wave formation at Venus
DOI: 10.1002/2016JA023769 Bibcode: 2017JGRA..122.4284C

Zhang, Tielong; Collinson, Glyn A.; Chong, Ghai Siung +3 more

Magnetometer and electron spectrometer data from Venus Express (VEX) are used to investigate the occurrence of boundary wave phenomenon occurring in the vicinity of the Venusian terminator. On 26 June 2006, VEX data show the ionosphere to be unmagnetized (≈0 nT), a common observation usually expected during solar maximum. This results in the respe…

2017 Journal of Geophysical Research (Space Physics)
VenusExpress 3
Deconstructing a galaxy: colour distributions of point sources in Messier 83
DOI: 10.1093/mnras/stx2037 Bibcode: 2017MNRAS.472.1074K

Barmby, P.; Kiar, A. K.; Hidalgo, A.

What do we see when we look at a nearby, well-resolved galaxy? Thousands of individual sources are detected in multiband imaging observations of even a fraction of a nearby galaxy, and characterizing those sources is a complex process. This work analyses a ten-band photometric catalogue of nearly 70 000 point sources in a 7.3 square arcmin region …

2017 Monthly Notices of the Royal Astronomical Society
eHST 3
Supernova remnants in the Magellanic Clouds
DOI: 10.48550/arXiv.1604.01458 Bibcode: 2017POBeo..96..185F

Bozzetto, L. M.; Filipovic, M. D.

We present initial results of an ongoing study of the supernova remnants (SNRs) and candidates in the Magellanic Clouds. Some 108 objects in both Clouds are considered to be either an SNR or a reliable candidate. This represents the most complete sample of known SNRs in any galaxy. therefore, this study allows us to study SNR population properties…

2017 Publications de l'Observatoire Astronomique de Beograd
XMM-Newton 3
Double-cusp simulation during northward IMF using 3D PIC global code
DOI: 10.1007/s10509-017-3098-8 Bibcode: 2017Ap&SS.362..125E

Esmaeili, Amin; Kalaee, Mohammad Javad

The cusp has important effects on the transportation of particles and their energy from the solar wind to the magnetosphere, and ionosphere, and high-altitude atmosphere. The cusp can be considered to be a part of the magnetospheric boundary layer with weaker magnetic fields. It has been studied since 1971 by different satellite observations. Desp…

2017 Astrophysics and Space Science
Cluster 3
Quasi-periodic Pulse Amplitude Modulation in the Accreting Millisecond Pulsar IGR J00291+5934
DOI: 10.3847/1538-4357/aa8172 Bibcode: 2017ApJ...845..124B

van der Klis, Michiel; Bult, Peter; van Doesburgh, Marieke

We introduce a new method for analyzing the aperiodic variability of coherent pulsations in accreting millisecond X-ray pulsars (AMXPs). Our method involves applying a complex frequency correction to the time-domain light curve, allowing for the aperiodic modulation of the pulse amplitude to be robustly extracted in the frequency domain. We discus…

2017 The Astrophysical Journal
XMM-Newton 3
Observations of V0332+53 during the 2015 outburst using Fermi/GBM, MAXI, Swift and INTEGRAL
DOI: 10.1093/mnras/stx384 Bibcode: 2017MNRAS.467.4424B

Rodi, James; Cherry, Michael L.; Baum, Zachary A.

We present the light curves, spectra and hardness-intensity diagram (HID) of the high-mass X-ray binary V0332+53 using Fermi/GBM, MAXI, Swift/BAT and INTEGRAL through its 2015 Type II outburst. We observe characteristic features in the X-ray emission (2-50 keV) due to periastron passages, the dynamical time-scale of the accretion disc, and changes…

2017 Monthly Notices of the Royal Astronomical Society
INTEGRAL 3
Peak flux of flares associated with coronal mass ejections
DOI: 10.1088/1674-4527/17/1/7 Bibcode: 2017RAA....17....7S

Suryanarayana, Gadikere Sheshagiriyappa; Balakrishna, Kagalagodu Manjunathayya

Features of flares that occur in association with coronal mass ejections (CMEs) have often displayed variations compared to flares with no associated CMEs. A comparative estimation of peak flux values of flares associated with CMEs and those without CMEs is made. Peak flux values of flares associated with CMEs show distinctly higher values in comp…

2017 Research in Astronomy and Astrophysics
SOHO 3
Localization of whistler wave and turbulent spectra in the magnetotail region
DOI: 10.1002/2016JA023640 Bibcode: 2017JGRA..122.1751P

Sharma, R. P.; Pathak, Neha; Sharma, Swati +2 more

Observations show that whistler waves play a very crucial role both in magnetic reconnection and turbulence. In this context, linear and nonlinear dynamical equations of whistler wave have been derived and further these equations have been solved numerically as well as semianalytically. For application purpose, magnetotail parameters have been cho…

2017 Journal of Geophysical Research (Space Physics)
Cluster 3
Stellar X‑ray accretion signatures
DOI: 10.1002/asna.201713331 Bibcode: 2017AN....338..201S

Robrade, J.; Günther, H. M.; Schneider, P. C.

2017 Astronomische Nachrichten
XMM-Newton 3