Dwarf and pre–main sequence spectra comparison
The shortest period detached white dwarf + main-sequence binary
... The ULTRACAM and SOFI light curves were used to flux cal- ibrate the X-shooter spectra. We fitted a model to each of the ULTRACAM light curves (see Section 3.2) and the SOFI J-band light curve in order to ...
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Mid IR spectra of pre main sequence Herbig stars : an explanation for the non detections of water lines
... 3.3. Series 3: Extended parameter space exploration For a direct comparison with Spitzer observations of Herbig disks, we expand the parameter space exploring Fig. 7. Herbig parameter space for the water line ...
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White dwarf-main sequence binaries from LAMOST: the DR5 catalogue
... their spectra are of lower SN ratio, which translates into larger parameter ...SN spectra or the fitted values do not survive our quality cuts and are excluded from the ...
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White dwarf-main sequence binaries from LAMOST: the DR5 catalogue
... their spectra are of lower SN ratio, which translates into larger parameter ...SN spectra or the fitted values do not survive our quality cuts and are excluded from the ...
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The population of white dwarf-main sequence binaries in the SDSS DR 12
... binary spectra can have relatively large uncertainties ( Rebassa-Mansergas et ...any comparison to the observational data sets is ...white dwarf effective temper- ature and surface gravity, using a ...
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Discovery of ZZ Cetis in detached white dwarf plus main-sequence binaries
... We used the high-speed camera ULTRACAM (Dhillon et al. 2007) mounted as a visitor instrument on ESO’s 3.5 m New Technology Telescope (NTT) at La Silla Observatory, Chile. Each target was observed in full-frame mode, for ...
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An M Dwarf Companion to an F-type Star in a Young Main-sequence Binary
... calibration, spectra of a Thorium – Argon lamp were taken directly before and after the ...Stellar spectra were taken with exposure times of 1800 s which resulted in a typical signal-to-noise ratio ( S / N ...
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Magnetic fields and differential rotation on the pre-main sequence
... Discovery of a Wide Planetary-Mass Companion of a Brown Dwarf in the Upper Scorpius Association . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 469 V. J. S. Be´jar, M. R. Zapatero ...
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Pre-main-sequence isochrones - I. The Pleiades benchmark
... The data reach cooler temperatures than the Stauffer et al. (2007) study, and are free of the uncertainties introduced by transforming heterogeneous data sets into a standard photometric system. In Section 2 we describe ...
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Pre-main-sequence variability across the radiative-convective gap
... 4.2 Comparison with older field stars Further support for a change in magnetic field topology at the RC gap can be found from recent studies using Zeeman Doppler imag- ing of older field dwarfs, where the same ...
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The age–metallicity relation in the solar neighbourhood from a pilot sample of white dwarf–main sequence binaries
... WD spectra, the metallicity obtained from the MS companion spectra and, finally, we discuss the AMR we obtained using a pilot data set of 23 WDMS ...
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Spectroscopic Characterisation of New Accreting Intermediate-Mass Pre-Main Sequence Stars
... the spectra; target spectra is shown in blue and the Bosz model spectra is shown in ...target spectra with the spectra of the model difficult for stars with T ef f < 9000K [Guimar˜aes ...
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Submillimeter lines from circumstellar disks around pre-main sequence stars
... In cases where no constraints are available, D J = 10 has been assumed. 5.3. Line profiles and intensities The line profiles are calculated using the full 2D radia- tive transfer code for the range of depletions derived ...
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Periodic Eruptive Variability of the Isolated Pre-main-sequence Star V347 Aurigae
... isolated pre- main sequence star located at distance d ≈200 ...All spectra exhibit strong Balmer and He I line emission, consistent with accretion, as well as high velocity emission arising ...
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The SDSS spectroscopic catalogue of white dwarf main sequence binaries : new identifications from DR 9–12
... white dwarf masses. For the sake of comparison, we also derive the white dwarf masses using the models of Renedo et ...SDSS spectra of the WDMS binaries for which we cannot obtain stellar ...
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The SDSS spectroscopic catalogue of white dwarf-main-sequence binaries: new identifications from DR 9–12
... white dwarf effective temperatures, surface gravities and masses, and secondary star spectral types for all WDMS binaries identified in this ...M dwarf and white dwarf templates to fit a given SDSS ...
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Differential rotation on both components of the pre-main-sequence binary system HD 155555
... Despite the improvement in the reconstruction of low-latitude features, the maps presented in Fig. 10 do not change the conclu- sions of Paper I. It may be interesting to note, however, that the small regions of flux, ...
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The first magnetic maps of a pre-main-sequence binary star system - HD 155555
... 4 Z E E M A N – D O P P L E R I M AG I N G O F B I N A RY S Y S T E M S All previous magnetic maps have been produced using ZDI codes designed to work on single stars. Therefore, the few maps of the primary stars of ...
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Magnetic fields and differential rotation on the pre-main sequence - III. The early-G star HD 106506
... of Comparison Stars: 25th July, 2005 BVR photometry was conducted at MKO in 2005 in or- der to determine the photometric colour of HD 106506 and the other nearby stars within the field of ...5 comparison ...
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The influence of radiative core growth on coronal X ray emission from pre main sequence stars
... For brevity we present only the box plots and not full breakdowns analogous to Tables 2 & 3. Partially convective stars are, on aver- age, more luminous than fully convective stars; likewise for Henyey compared to ...
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