We present the first automated fitting method for the quantitative spectroscopy of O- and early B-type stars with stellar winds. The method combines the non-LTE stellar atmosphere code fastwind from Puls et al. (2005, A&A, 435, 669) with the genetic algorithm based optimization routine pikaia from Charbonneau (1995, ApJS, 101, 309), allowing for a
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It also provides access to IAC Preprints Repository here: https://research.iac.es/preprints/
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Spectral analysis of early-type stars using a genetic algorithm based fitting methodMokiem, M. R. et al.102005
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Spectral analysis of high resolution near-infrared spectra of ultra cool dwarfs
Aims:We present an analysis of high resolution spectra in the J band of five ultra cool dwarfs from M6 to L0. Methods: We make use of a new ab initio water vapour line list and existing line lists of FeH and CrH for modelling the observations. Results: We find a good fit for the Mn I 12 899.76 Å line. This feature is one of the few for which we
Lyubchik, Y. et al.Advertised on:
102007 -
Spectral Energy Distribution of Far-infrared Bright Quasar Sample in the Lockman Hole
The far-infrared (FIR) properties of Quasi-Stellar Objects (QSOs) is important in connecting the Starburst (SB) and Active Galactic Nucleus (AGN) activities. Therefore, we constructed a 24 μ m selected QSO sample to study their FIR behavior. All sources were spectroscopically identified from MMT or the Sloan Digital Sky Survey (SDSS) as broadline
Dai, Y. et al.Advertised on:
102011 -
Spectral evidence for jets from Accreting Millisecond X-ray Pulsars
Transient radio emission from X-ray binaries is associated with synchrotron emission from collimated jets that escape the system, and accreting millisecond X-ray pulsars (AMXPs) are no exception. Although jets from black hole X-ray binaries are well-studied, those from neutron star systems appear much fainter, for reasons yet uncertain. Jets are
Russell, D. M. et al.Advertised on:
102008 -
Spectral Parameters Following Gaffey Method Of Near-earth Asteroids And Main Belt Objects
We have computed the Band Area Ratio (BAR) and Band I Center parameters, following the method by Cloutis et al. (1986) and Gaffey et al. (1993) for all the existent visible and near-infrared spectra of near-Earth asteroids (NEAs), main belt asteroids (MBs) and meteorites (Duffard et al.2005). For the NEAs we have grouped observations from NEOSS (de
de León, Julia et al.Advertised on:
102007 -
Spectral state transitions of the Ultraluminous X-ray Source IC 342 X-1
We observed the Ultraluminous X-ray Source (ULX) IC 342 X-1 simultaneously in X-ray and radio with Chandra and the JVLA to investigate previously reported unresolved radio emission coincident with the ULX. The Chandra data reveal a spectrum that is much softer than observed previously and is well modelled by a thermal accretion disc spectrum. No
Marlowe, H. et al.Advertised on:
102014