Fundamental parameters and evolutionary state   of the Herbig Ae star
candidate HD 35929

Мирошниченко, А. С.; Gray, R. O.; Клочкова, В. Г.; Bjorkman, K. S.; Kuratov, K. S.

doi:10.1051/0004-6361:20041618

Cited by 9 publications

(7 citation statements)

References 31 publications

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“…The spectrum of HD 35929 is consistent with the effective temperature and gravity determination of Miroshnichenko et al (2004, T eff = 6800 ± 100 K, log g = 3.3 ± 0.1). It displays a strong and narrow single-peaked emission profile in Hα, as well as emissions with central absorption in the Ca ii IR-triplet.…”

Section: A15 Hd 35929supporting

confidence: 78%

A high-resolution spectropolarimetric survey of Herbig Ae/Be stars – I. Observations and measurements★

Alécian¹,

Wade²,

Catala³

et al. 2012

Monthly Notices of the Royal Astronomical Society

248

247

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This is the first in a series of papers in which we describe and report the analysis of a large survey of Herbig Ae/Be stars in circular spectropolarimetry. Using the ESPaDOnS and Narval high-resolution spectropolarimeters at the Canada-France-Hawaii and Bernard Lyot Telescopes, respectively, we have acquired 132 circularly-polarised spectra of 70 Herbig Ae/Be stars and Herbig candidates. The large majority of these spectra are characterised by a resolving power of about 65,000, and a spectral coverage from about 3700 Å to 1 µm. The peak signal-to-noise ratio per CCD pixel ranges from below 100 (for the faintest targets) to over 1000 (for the brightest). The observations were acquired with the primary aim of searching for magnetic fields in these objects. However, our spectra are suitable for a variety of other important measurements, including rotational properties, variability, binarity, chemical abundances, circumstellar environment conditions and structure, etc. In this first paper, we describe the sample selection, the observations and their reduction, and the measurements that will comprise the basis of much of our following analysis. We describe the determination of fundamental parameters for each target. We detail the Least-Squares Deconvolution that we have applied to each of our spectra, including the selection, editing and tuning of the LSD line masks. We describe the fitting of the LSD Stokes I profiles using a multi-component model that yields the rotationally-broadened photospheric profile (providing the projected rotational velocity and radial velocity for each observation) as well as circumstellar emission and absorption components. Finally, we diagnose the longitudinal Zeeman effect via the measured circular polarisation, and report the longitudinal magnetic field and Stokes V Zeeman signature detection probability. As an appendix, we provide a detailed review of each star observed.

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Section: A15 Hd 35929supporting

confidence: 78%

A high-resolution spectropolarimetric survey of Herbig Ae/Be stars – I. Observations and measurements★

Alécian¹,

Wade²,

Catala³

et al. 2012

Monthly Notices of the Royal Astronomical Society

248

247

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“…A few years ago we found two such objects, HD 19993 ( Miroshnichenko et al 2003b) and HD 35929 ( Miroshnichenko et al 2004). Our new findings suggest that the phenomenon occurs more frequently than just by chance.…”

Section: Discussionmentioning

confidence: 53%

“…15 and 16). It might be another member of a recently discovered, but not yet studied type of evolved early-type stars with CS dust (Miroshnichenko et al 2003b(Miroshnichenko et al , 2004. is plotted vs. logarithm of the wavelength in microns.…”

Section: Iras 02155+6410mentioning

confidence: 99%

Toward Understanding the B[e] Phenomenon. II. New Galactic FS CMa Stars

Мирошниченко

Manset

Kusakin

et al. 2007

ApJ

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FS CMa stars form a group of objects with the B[e] phenomenon that were previously known as unclassified B[e] stars or B[e] stars with warm dust (B[e]WD) until recently. They exhibit strong emission-line spectra and strong IR excesses, most likely due to recently formed circumstellar dust. These properties have been suggested to be due to ongoing or recent rapid mass exchange in binary systems with hot primaries and various types of secondaries. The first paper of this series reported an analysis of the available information about previously known Galactic objects with the B[e] phenomenon, the initial selection of the FS CMa group objects, and a qualitative explanation of their properties. This paper reports the results of our new search for more FS CMa objects in the IRAS Point Source Catalog. We present new photometric criteria for identifying FS CMa stars as well as the first results of our observations of nine new FS CMa group members. With this addition, the FS CMa group has now 40 members, becoming the largest among the dust-forming hot star groups. We also present nine objects with no evidence for the B[e] phenomenon, but with newly discovered spectral line emission and/or strong IR excesses.

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“…In contrast to the other objects, the Br γ line in HD 32929 appears to be in absorption with a very broad extent in Figure 2, but after correction for the effect of photospheric absorption, we determine this line to be in emission. It should be noted that this object has also previously been classified as a post-main sequence star (Miroshnichenko et al 2004). A full study of the other atomic hydrogen lines mentioned here, and their diagnostic power, will be performed in a subsequent publication (Fairlamb et al in prep.…”

Section: Observational Resultsmentioning

confidence: 91%

Investigating the inner discs of Herbig Ae/Be stars with CO bandhead and Brγ emission★

Ilee

Fairlamb

Oudmaijer

et al. 2014

Monthly Notices of the Royal Astronomical Society

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Herbig Ae/Be stars lie in the mass range between low and high mass young stars, and therefore offer a unique opportunity to observe any changes in the formation processes that may occur across this boundary. This paper presents medium resolution VLT/X-Shooter spectra of six Herbig Ae/Be stars, drawn from a sample of 91 targets, and high resolution VLT/CRIRES spectra of five Herbig Ae/Be stars, chosen based on the presence of CO first overtone bandhead emission in their spectra. The X-Shooter survey reveals a low detection rate of CO first overtone emission (7 per cent), consisting of objects mainly of spectral type B. A positive correlation is found between the strength of the CO v = 2-0 and Br γ emission lines, despite their intrinsic linewidths suggesting a separate kinematic origin. The high resolution CRIRES spectra are modelled, and are well fitted under the assumption that the emission originates from small scale Keplerian discs, interior to the dust sublimation radius, but outside the corotation radius of the central stars. In addition, our findings are in very good agreement for the one object where spatially resolved near-infrared interferometric studies have also been performed. These results suggest that the Herbig Ae/Be stars in question are in the process of gaining mass via disc accretion, and that modelling of high spectral resolution spectra is able to provide a reliable probe into the process of stellar accretion in young stars of intermediate to high masses.

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Fundamental parameters and evolutionary state of the Herbig Ae star candidate HD 35929

Cited by 9 publications

References 31 publications

A high-resolution spectropolarimetric survey of Herbig Ae/Be stars – I. Observations and measurements★

A high-resolution spectropolarimetric survey of Herbig Ae/Be stars – I. Observations and measurements★

Toward Understanding the B[e] Phenomenon. II. New Galactic FS CMa Stars

Investigating the inner discs of Herbig Ae/Be stars with CO bandhead and Brγ emission★

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