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The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder - II. Estimating radial velocity of SPIRE spectral observation sources
Valtchanov, Ivan; Scott, Jeremy P.; Spencer, Locke D. +3 more
The Herschel SPIRE FTS Spectral Feature Finder (FF) detects significant spectral features within SPIRE spectra and employs two routines, and external references, to estimate source radial velocity. The first routine is based on the identification of rotational 12CO emission, the second cross-correlates detected features with a line temp…
Identification of a new ultraluminous X-ray source in NGC 1316
Ozdogan Ela, M.; Akyuz, A.; Aksaker, N. +3 more
In this study, we report identification of a new ultraluminous X-ray source (ULX) named as X-7 in NGC 1316, with an unabsorbed luminosity of 2.1 × 1039 erg s-1 using the two recent Chandra archival observations. The X-7 was detected in the Chandra 2001 observation and was included in the source list of the NGC 1316 as CXOUJ03…
Lessons on early structure formation from a mature galaxy cluster observed at cosmic noon
Bromm, Volker; Liu, Boyuan; Schauer, Anna T. P.
We demonstrate a new approach of indirectly constraining both early star and structure formation via mature galaxy clusters at cosmic noon (z ∼ 2), using the cluster XLSSC 122 as an example. With the standard Press Schechter formalism, we infer a rapid evolution of the star formation efficiency (the ratio of stellar to halo mass) from 10-4
Gas kinematics of key prebiotic molecules in GV Tau N revealed with an ALMA, PdBI, and Herschel synergy
Pilleri, P.; Fuente, A.; Rivière-Marichalar, P. +4 more
A large effort has been made to detect warm gas in the planet formation zone of circumstellar discs using space and ground-based near-infrared facilities. GV Tau N, the most obscured component of the GV Tau system, is an outstanding source, being one of the first targets detected in HCN and the only one detected in CH4 so far. Although …
The Herschel SPIRE Fourier Transform Spectrometer Spectral Feature Finder - III. Line identification and off-axis spectra
Valtchanov, I.; Spencer, L. D.; Hopwood, R. +5 more
The European Space Agency Herschel Spectral and Photometric Imaging Receiver (SPIRE) Fourier Transform Spectrometer (FTS) Spectral Feature Finder (FF) project is an automated spectral feature fitting routine developed within the SPIRE instrument team to extract all prominent spectral features from all publicly available SPIRE FTS observations. We …
XMM-Newton study of X-ray sources in the field of Willman 1 dwarf spheroidal galaxy
Sasaki, Manami; Saeedi, Sara
We present the results of the analysis of three XMM-Newton observations of the Willman 1 dwarf spheroidal galaxy (Wil 1). X-ray sources are classified on the basis of spectral analysis, hardness ratios, X-ray-to-optical flux ratio, X-ray variability, and cross-correlation with available catalogues in optical and infrared wavelengths. We catalogued…
Vertical distribution of HMXBs in NGC 55: constraining their centre-of-mass velocity
Zezas, Andreas; Williams, Stephen J.; Andrews, Jeff J. +1 more
We analyse the vertical distribution of high-mass X-ray binaries (HMXBs) in NGC 55, the nearest edge-on galaxy to the Milky Way (MW), based on X-ray observations by Chandra. Adopting a statistical approach, we estimate the difference between the scale height of the vertical distribution of HMXBs and the vertical distribution of star-forming activi…
ASAS census of twins
Bakış, Volkan; Yücel, Gökhan; Eker, Zeki +2 more
Twin binaries were identified among the eclipsing binaries with δ > -30° listed in the All Sky Automated Survey (ASAS) catalogue. In addition to the known twin binaries in the literature, 68 new systems have been identified and photometric and spectroscopic observations were done. Colour, spectral type, temperature, ratio of radii and masses of…
The effects of unresolved double degenerates in the white dwarf luminosity function
Rebassa-Mansergas, A.; Torres, S.; Toonen, S. +1 more
We perform an analysis of the single white dwarf and the double degenerate binary populations in the solar neighbourhood following a population synthesis approach to investigate the effects of unresolved double degenerates in the white dwarf luminosity function. We consider all unresolved synthetic binaries to be associated with fictitious effecti…
Mapping local interstellar medium with diffuse interstellar bands
Paunzen, Ernst; Piecka, Martin
With the use of the data from archives, we studied the correlations between the equivalent widths of four diffuse interstellar bands (4430, 5780, 5797, 6284 $\mathring{\rm A}$ ) and properties of the target stars (colour excess values, distances, and Galactic coordinates). Many different plots of the diffuse interstellar bands and their maps were …