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Project 1640 observations of the white dwarf HD 114174 B
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Number of Authors: 27
2017 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 469, no 4, 4796-4805 p.Article in journal (Refereed) Published
Abstract [en]

We present the first near infrared spectrum of the faint white dwarf companion HD 114174 B, obtained with Project 1640. Our spectrum, covering the Y, J and H bands, combined with previous TaRgetting bENchmark-objects with Doppler Spectroscopy (TRENDS) photometry measurements, allows us to place further constraints on this companion. We suggest two possible scenarios; either this object is an old, low-mass, cool H atmosphere white dwarf with T-eff similar to 3800 K or a high-mass white dwarf with T-eff > 6000 K, potentially with an associated cool (T-eff similar to 700 K) brown dwarf or debris disc resulting in an infrared excess in the L' band. We also provide an additional astrometry point for 2014 June 12 and use the modelled companion mass combined with the radial velocity and direct imaging data to place constraints on the orbital parameters for this companion.

Place, publisher, year, edition, pages
2017. Vol. 469, no 4, 4796-4805 p.
Keyword [en]
methods: data analysis, techniques: imaging spectroscopy, planets and satellites: detection, white dwarfs
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-147133DOI: 10.1093/mnras/stx1171ISI: 000406837900075OAI: oai:DiVA.org:su-147133DiVA: diva2:1145289
Available from: 2017-09-28 Created: 2017-09-28 Last updated: 2017-09-28Bibliographically approved

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