Non-detection of J1407 b in ALMA Band 7 Observations

Abstract We report on Atacama Large Millimeter/submillimeter Array (ALMA) Band 7 continuum observations toward the star 1SWASP J140747.93-394542.6 taken in mid 2024. These observations were a follow-up of a previous detection of an emission source in the J1407 field of view at an unexpected position in 2017. Proper motion analysis indicated that if this were the object responsible for the 2007 eclipse of J1407, it would be detectable at a new position, but still within an ALMA field of view in 2024. Here we present the non-detection of emission in the ALMA field of view (to a 1 σ upper limit of 17.5 μ Jy), at both the 2017 position, and the position expected from proper motions. We place upper limits on a source at the proper motion corrected expected location in this 2024 data, and rule out the possibility of a dusty object being responsible for the 2007 eclipse.

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Journal
Research Notes of the AAS
Published
2025-12-04
DOI
https://doi.org/10.3847/2515-5172/ae2680
Primary Topic
Astrophysics and Star Formation Studies
Type
article
Field-Weighted Citation Impact
0.00

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article

Non-detection of J1407 b in ALMA Band 7 Observations

Nienke van der Marel, Antonio Hales, M. Min, A. H. M. J. Triaud et al.
Research Notes of the AAS
Astrophysics and Star Formation Studies
article

Non-detection of J1407 b in ALMA Band 7 Observations

Nienke van der Marel, Antonio Hales, M. Min, A. H. M. J. Triaud, Pamela Klaassen, Matthew D. Kenworthy, Eric E. Mamajek
article en

Abstract

Abstract We report on Atacama Large Millimeter/submillimeter Array (ALMA) Band 7 continuum observations toward the star 1SWASP J140747.93-394542.6 taken in mid 2024. These observations were a follow-up of a previous detection of an emission source in the J1407 field of view at an unexpected position in 2017. Proper motion analysis indicated that if this were the object responsible for the 2007 eclipse of J1407, it would be detectable at a new position, but still within an ALMA field of view in 2024. Here we present the non-detection of emission in the ALMA field of view (to a 1 σ upper limit of 17.5 μ Jy), at both the 2017 position, and the position expected from proper motions. We place upper limits on a source at the proper motion corrected expected location in this 2024 data, and rule out the possibility of a dusty object being responsible for the 2007 eclipse.

Research Notes of the AASVol. 9(12)
Leiden University (NL), Jet Propulsion Laboratory (US), National Radio Astronomy Observatory (US), Atacama Large Millimeter Submillimeter Array (CL), Royal Observatory (GB), Space Research Organisation Netherlands (NL), UK Astronomy Technology Centre (GB), University of Birmingham (GB)
National Science Foundation, National Aeronautics and Space Administration, California Institute of Technology, National Radio Astronomy Observatory, Korea Astronomy and Space Science Institute, National Astronomical Observatory of Japan, Jet Propulsion Laboratory, National Institutes of Natural Sciences
Openalex Percentile: Top 74%
Astrophysics and Star Formation Studies
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