Geophysics and Gravity Measurements

Abstract Two questions motivated this study: 1) Will meteorological droughts become more frequent and severe during the twenty-first century? 2) Given the projected global temperature rise, to what extent does the inclusion of temperature (in addition to precipitation) in drought indicators play a role in future meteo…

• MEHMET LEVENT KURNAZ
• TUĞBA ÖZTÜRK

In 2018 we celebrated 25 years of development of radar altimetry, and the progress achieved by this methodology in the fields of global and coastal oceanography, hydrology, geodesy and cryospheric sciences. Many symbolic major events have celebrated these developments, e.g., in Venice, Italy, the 15th (2006) and 20th…

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We report the results of the spectral analysis of two observations of the Vela pulsar with the Chandra X-Ray Observatory . The spectrum of the pulsar does not show statistically significant spectral lines in the observed 0.25-8.0 keV band. Similar to middle-aged pulsars with detected thermal emission, the spectrum con…

We study the structure of neutron stars in perturbative f ( R ) gravity models with realistic equations of state. We obtain mass-radius relations in a gravity model of the form f ( R ) = R +α R 2 . We find that deviations from the results of general relativity, comparable to the variations due to using different equat…

• CEMSİNAN DELİDUMAN

We study the structure of neutron stars in perturbative f ( R ) gravity models with realistic equations of state. We obtain mass-radius relations in a gravity model of the form f ( R ) = R +α R 2 . We find that deviations from the results of general relativity, comparable to the variations due to using different equat…

• KAZIM YAVUZ EKŞİ

We study the effect of a mass term in the spontaneous scalarization of neutron stars, for a wide range of scalar field parameters and neutron star equations of state. Even though massless scalars have been the focus of interest in spontaneous scalarization so far, recent observations of binary systems rule out most of…

• FETHİ MÜBİN RAMAZANOĞLU

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• LEYLA ÇAKIR

Abstract Researchers are aware of certain types of problems that arise when modelling interconnections between general circulation and regional processes, such as prediction of regional, local‐scale climate variables from large‐scale processes, e.g. by means of general circulation model (GCM) outputs. The problem solu…

The central source of the supernova remnant PKS 1209-51/52 was observed with the Advanced CCD Imaging Spectrometer aboard Chandra X-Ray Observatory on 2000 January 6-7. The use of the continuous clocking mode allowed us to perform the timing analysis of the data with a time resolution of 2.85 ms and to find a period P…

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• MEHMET ILICAK

In this paper a new algorithm for short‐term regularized estimation of vertical total electron content (VTEC) from Global Positioning System (GPS) data is developed. The regularization technique can combine signals, from all GPS satellites for a given instant and a given receiver, for a desired time duration within th…

• FEZA ARIKAN