A new pulsating PG 1159 white dwarf - RXJ 2117.1 + 3412

Bibcode
1993A&A...267L..35V
Vauclair, G.; Belmonte, J. A.; Pfeiffer, B.; Chevreton, M.; Dolez, N.; Motch, C.; Werner, K.; Pakull, M. W.
Bibliographical reference

Astronomy and Astrophysics (ISSN 0004-6361), vol. 267, no. 1, p. L35-L38.

Advertised on:
1
1993
Number of authors
8
IAC number of authors
1
Citations
27
Refereed citations
21
Description
RXJ 2117.1 + 3412 is a newly spectroscopically identified bright PG1159 star discovered in the ROSAT XRT sky survey. We report the results of rapid photometry observations performed at the 2.5m Nordic Optical Telescope, on 1992 August 23-27. RXJ2117.1 + 3412 is a low amplitude multiperiodic pulsator. The analysis of 28 h of rapid photometry reveals that the light curve contains at least 24 frequencies. The power spectrum is dominated by a 5 mmag amplitude pulsation of 821 s period. Other modes are found in a wide range of periods: 246 - 3150 s. A test on the period distribution indicates two mean period spacings at 20.48 s and 22.61 s which, when interpreted as the expected period spacings in the asymptotic limit for g-modes of degree l = 1 and l = 2, lead to a mass of 0.62 and 0.58 solar mass, respectively.
Type
Refereed
Stellar oscillations
White dwarf stars
Variable stars

It may interest you

  • Refereed
    Constraining the TeV gamma-ray emission of SN 2024bch, a possible type IIn-L from a red supergiant progenitor: Multiwavelength observations and analysis of the progenitor
    We present very high-energy optical photometry and spectroscopic observations of SN 2024bch in the nearby galaxy NGC 3206 (∼20 Mpc). We used gamma-ray observations performed with the first Large-Sized Telescope (LST-1) of the Cherenkov Telescope Array Observatory (CTAO) and optical observations with the Liverpool Telescope (LT) combined with data
    Abe, K. et al.

    Advertised on:

    10
    2025
    Bibcode
    2025A&A...702A.125A
    Citations
    0
  • Refereed
    An ALMA Band 7 survey of SDSS/Herschel quasars in Stripe 82: I. The properties of the 870 micron counterparts
    Context. Over the past 15 years, studies of quasars in the far-infrared (FIR) have reported host luminosities ranging from 10 12 to 10 14 L ⊙. These luminosities, often derived from Herschel/SPIRE photometry, suggest star formation rates (SFRs) of up to several thousand M ⊙ yr ‑1, positioning them among the most luminous starburst galaxies in the
    Hatziminaoglou, E. et al.

    Advertised on:

    10
    2025
    Bibcode
    2025A&A...702A.183H
    Citations
    0
  • Refereed
    Transit timing variations in HIP 41378: CHEOPS and TESS confirm a non-transiting sixth planet in the system
    In multiple-planet systems, gravitational interactions of exoplanets could lead to transit timing variations (TTVs), whose amplitude becomes significantly enhanced when planets are in or near mean-motion resonances (MMRs), making them more easily detectable. In cases where both TTVs and radial velocity (RV) measurements are available, combined
    Leonardi, P. et al.

    Advertised on:

    10
    2025
    Bibcode
    2025A&A...702A.211L
    Citations
    0