| Title: |
Can instrumental effects obscure the true photospheric wave spectrum? |
| Authors: |
M. Berretti; M. Stangalini; D. B. Jess; S. Jafarzadeh; S. D. T. Grant; G. Verth; V. Fedun; G. Chambers; F. Berrilli |
| Contributors: |
Berretti, M; Stangalini, M; Jess, Db; Jafarzadeh, S; Grant, Sdt; Verth, G; Fedun, V; Chambers, G; Berrilli, F |
| Publisher Information: |
IOP Publishing |
| Publication Year: |
2026 |
| Collection: |
Universitá degli Studi di Roma "Tor Vergata": ART - Archivio Istituzionale della Ricerca |
| Subject Terms: |
Solar magnetic field; Solar oscillation; Solar photosphere; Solar and Stellar Astrophysic; Instrumentation and Methods for Astrophysics; Settore FIS/06; Settore PHYS-05/B - Fisica del sistema Terra; dei pianeti; dello spazio e del clima |
| Time: |
1503; 1515; 1518 |
| Description: |
Optical aberrations and instrument resolution can affect the observed morphological properties of features in the solar atmosphere. However, little work has been done to study the effects of spatial resolution on the dynamical processes occurring in the Sun's atmosphere. In this work, owing to the availability of high-resolution observations of a magnetic pore captured with the Interferometric BIdimensional Spectrometer mounted at the Dunn Solar Telescope, we studied the impact of the diffraction limit and the sampling of an instrument on line-of-sight Doppler velocity oscillations. We reported a noticeable shift in the dominant frequency band from 5 to 3 mHz, as both the angular and detector resolutions of the instruments were degraded. We argue that the observed behavior is a result of the increased contamination of straylight from neighboring quiet Sun regions, masking the true behavior of umbral oscillations. These results suggest that the wave energy contributions reported in the literature and based on low-resolution instrumentation may be fundamentally underestimated. As we move into the era of high-resolution instrumentation such as DKIST and MUSE, this paper will offer a critical baseline for interpreting new observations, especially in terms of distinguishing true dynamic behaviors from artifacts introduced by instrument-related limitations. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/wos/WOS:001668055100001; volume:997; issue:2; journal:THE ASTROPHYSICAL JOURNAL; https://hdl.handle.net/2108/454323 |
| DOI: |
10.3847/1538-4357/ae331b |
| DOI: |
10.3847/1538-4357/ae331b/pdf |
| Availability: |
https://hdl.handle.net/2108/454323; https://doi.org/10.3847/1538-4357/ae331b; https://iopscience.iop.org/article/10.3847/1538-4357/ae331b/pdf |
| Rights: |
info:eu-repo/semantics/openAccess ; license:Creative commons ; license uri:http://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.8C5596E4 |
| Database: |
BASE |