The SDSS/APOGEE catalogue of HgMn stars Virtual Observatory Resource

Authors
  1. Chojnowski S.D.
  2. Hubrig S.
  3. Hasselquist S.
  4. Beaton R.L.
  5. Majewski S.R.,Garcia-Hernandez D.A.
  6. Decolibus D.
  7. Published by
    CDS
Abstract

We report on H-band spectra of chemically peculiar Mercury-Manganese (HgMn) stars obtained via the SDSS/APOGEE survey. As opposed to other varieties of chemically peculiar stars such as classical Ap/Bp stars, HgMn stars lack strong magnetic fields and are defined by extreme overabundances of Mn, Hg, and other heavy elements. A satisfactory explanation for the abundance patterns remains to be determined, but low rotational velocity is a requirement and involvement in binary/multiple systems may be as well. The APOGEE HgMn sample currently consists of 269 stars that were identified among the telluric standard stars as those whose metallic absorption content is limited to or dominated by the H-band MnII lines. Due to the fainter magnitudes probed by the APOGEE survey as compared to past studies, only 9/269 stars in the sample were previously known as HgMn types. The 260 newly identified HgMn stars represents a more than doubling of the known sample. At least 32 per cent of the APOGEE sample are found to be binary or multiple systems, and from multi-epoch spectroscopy, we were able to determine orbital solutions for at least one component in 32 binaries. Many of the multilined systems include chemically peculiar companions, with noteworthy examples being the HgMn+Ap/Bp binary HD 5429, the HgMn+HgMn binary HD 298641, and the HgMn+BpMn+Am triple system HD 231263. As a further peculiarity, roughly half of the sample produces narrow emission in the CI 16895{AA} line, with widths and radial velocities that match those of the MnII lines.

Keywords
  1. peculiar-variable-stars
  2. multiple-stars
  3. line-intensities
  4. radial-velocity
  5. stellar-spectral-types
  6. orbits
  7. infrared-astronomy
  8. spectroscopy
Bibliographic source Bibcode
2020MNRAS.496..832C
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/496/832
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/496/832

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/496/832
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/496/832
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/496/832
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/496/832/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/496/832/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/496/832/table1?

History

2023-09-18T15:26:24Z
Resource record created
2023-09-18T15:26:24Z
Created
2024-06-05T15:47:11Z
Updated

Contact

Name
CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr