Probable detection of radial magnetic field gradients in the atmospheres of Ap stars

Details Probable detection of radial magnetic field gradients in the atmospheres of Ap stars Probable detection of radial magnetic field gradients in the atmospheres of Ap stars

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004a%26a...422l..51n&link_type=abstract

Astronomy and Astrophysics, v.422, p.L51-L54 (2004)

Astronomy and Astrophysics

Astrophysics

8

Stars: Atmospheres, Physical Data And Processes: Atomic Processes, Atomic Data, Stars: Abundances, Stars: Chemically Peculiar, Stars: Individual: Hd 965, Stars: Individual: Hd 116114, Stars: Individual: 33 Lib

Scientific paper

For the first time the possible presence of radial gradients of magnetic fields in the atmospheres of three magnetic Ap stars has been critically examined by measurements of the mean magnetic field modulus from spectral lines resolved into magnetically split components lying on the different sides of the Balmer jump. A number of useful diagnostic lines below and above the Balmer discontinuity, only slightly affected by blends, with simple doublet and triplet Zeeman pattern have been identified from the comparison between synthetic spectra computed with the SYNTHMAG code and the high resolution and S/N spectra obtained in unpolarized light with the ESO VLT UVES spectrograph. For all three stars of our sample, HD 965, HD 116114 and 33 Lib, an increase of the magnetic field strength of the order of a few hundred Gauss has been detected bluewards of the Balmer discontinuity. These results should be taken into account in future modelling of the geometric structure of Ap star magnetic fields and the determination of the chemical abundances in Ap stars with strong magnetic fields.
Based on observations obtained at the European Southern Observatory, Paranal, Chile (ESO program No. 70.D-0470).

Affiliated with

Also associated with

No associations

Rating

Probable detection of radial magnetic field gradients in the atmospheres of Ap stars does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Probable detection of radial magnetic field gradients in the atmospheres of Ap stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Probable detection of radial magnetic field gradients in the atmospheres of Ap stars will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1075069