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Year 1 of the ZTF h...
Year 1 of the ZTF high-cadence Galactic plane survey : strategy, goals, and early results on new single-mode hot subdwarf B-star pulsatos
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Kupfer, Thomas (author)
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Prince, Thomas A. (author)
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van Roestel, Jan (author)
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Bellm, Eric C. (author)
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Bildsten, Lars (author)
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Coughlin, Michael W. (author)
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Drake, Andrew J. (author)
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Graham, Matthew J. (author)
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Klein, Courtney (author)
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Kulkarni, Shrinivas R. (author)
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Masci, Frank J. (author)
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Walters, Richard (author)
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Andreoni, Igor (author)
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- Biswas, Rahul (author)
- Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC)
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Bradshaw, Corey (author)
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Duev, Dmitry A. (author)
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Dekany, Richard (author)
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Guidry, Joseph A. (author)
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Hermes, J. J. (author)
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Laher, Russ R. (author)
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Riddle, Reed (author)
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(creator_code:org_t)
- 2021-05-12
- 2021
- English.
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In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 505:1, s. 1254-1267
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https://arxiv.org/ab...
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https://authors.libr...
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Abstract
Subject headings
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- We present the goals, strategy, and first results of the high-cadence Galactic plane survey using the Zwicky Transient Facility (ZTF). The goal of the survey is to unveil the Galactic population of short-period variable stars, including short-period binaries, and stellar pulsators with periods less than a few hours. Between 2018 June and 2019 January, we observed 64 ZTF fields resulting in 2990 deg2 of high stellar density in the ZTF-r band along the Galactic plane. Each field was observed continuously for 1.5 to 6 h with a cadence of 40 sec. Most fields have between 200 and 400 observations obtained over 2–3 continuous nights. As part of this survey, we extract a total of ≈230 million individual objects with at least 80 epochs obtained during the high-cadence Galactic plane survey reaching an average depth of ZTF–r ≈ 20.5 mag. For four selected fields with 2–10 million individual objects per field, we calculate different variability statistics and find that ≈1–2 per cent of the objects are astrophysically variable over the observed period. We present a progress report on recent discoveries, including a new class of compact pulsators, the first members of a new class of Roche lobe filling hot subdwarf binaries as well as new ultracompact double white dwarfs and flaring stars. Finally, we present a sample of 12 new single-mode hot subdwarf B-star pulsators with pulsation amplitudes between ZTF–r = 20–76 mmag and pulsation periods between P = 5.8–16 min with a strong cluster of systems with periods ≈6 min. All of the data have now been released in either ZTF Data Release 3 or Data Release 4.
Subject headings
- NATURVETENSKAP -- Fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences (hsv//eng)
Keyword
- surveys
- binaries (including multiple): close
- stars: oscillations (including pulsations)
- white dwarfs
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Kupfer, Thomas
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Prince, Thomas A ...
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van Roestel, Jan
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Bellm, Eric C.
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Bildsten, Lars
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Coughlin, Michae ...
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show more...
-
Drake, Andrew J.
-
Graham, Matthew ...
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Klein, Courtney
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Kulkarni, Shrini ...
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Masci, Frank J.
-
Walters, Richard
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Andreoni, Igor
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Biswas, Rahul
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Bradshaw, Corey
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Duev, Dmitry A.
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Dekany, Richard
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Guidry, Joseph A ...
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Hermes, J. J.
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Laher, Russ R.
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Riddle, Reed
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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Monthly notices ...
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Stockholm University