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Stellar physics at sub-nanoradian angular resolution

Fuente: arXiv

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Detalles Bibliográficos
Autores principales:	Batista, P., Biteau, J., Carlile, C., Cortina, J., Della Volpe, D., Dravins, D., Fiori, M., Funk, S., Guerin, W., Hassan, T., Ingenhütt, C., Martínez, I. Jiménez, Kaiser, R., Koziol, G., Lai, O., Luce, Q., Lyard, E., Mirzoyan, R., Mitchell, A. W. M., Nomerotski, A., Produit, N., Raiola, A., Saha, P., Schweizer, T., Sliusar, V., Spolon, A., Stanic, L., Walter, R., Zampieri, L., von Zanthier, J., Zmija, A., Aufdenberg, J., Bender, C. F., Hermes, J. J., Kieda, D., Lisa, M., Mueninghoff, A., Rai, K. N., van Tilburg, K.
Formato:	Preprint
Publicado:	2025
Materias:	Instrumentation and Methods for Astrophysics Earth and Planetary Astrophysics Solar and Stellar Astrophysics
Acceso en línea:	Acceder al recurso
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

_version_	1866917140852899840
author	Batista, P. Biteau, J. Carlile, C. Cortina, J. Della Volpe, D. Dravins, D. Fiori, M. Funk, S. Guerin, W. Hassan, T. Ingenhütt, C. Martínez, I. Jiménez Kaiser, R. Koziol, G. Lai, O. Luce, Q. Lyard, E. Mirzoyan, R. Mitchell, A. W. M. Nomerotski, A. Produit, N. Raiola, A. Saha, P. Schweizer, T. Sliusar, V. Spolon, A. Stanic, L. Walter, R. Zampieri, L. von Zanthier, J. Zmija, A. Aufdenberg, J. Bender, C. F. Hermes, J. J. Kieda, D. Lisa, M. Mueninghoff, A. Rai, K. N. van Tilburg, K.
author_facet	Batista, P. Biteau, J. Carlile, C. Cortina, J. Della Volpe, D. Dravins, D. Fiori, M. Funk, S. Guerin, W. Hassan, T. Ingenhütt, C. Martínez, I. Jiménez Kaiser, R. Koziol, G. Lai, O. Luce, Q. Lyard, E. Mirzoyan, R. Mitchell, A. W. M. Nomerotski, A. Produit, N. Raiola, A. Saha, P. Schweizer, T. Sliusar, V. Spolon, A. Stanic, L. Walter, R. Zampieri, L. von Zanthier, J. Zmija, A. Aufdenberg, J. Bender, C. F. Hermes, J. J. Kieda, D. Lisa, M. Mueninghoff, A. Rai, K. N. van Tilburg, K.
contents	Many stars -- if they could be imaged with enough angular resolution -- would exhibit features expected from theory but not possible to extract from spectra. We may group these by increasing complexity as follows. First, smooth variations in brightness across the surface, resembling solar limb darkening but much more prominent and involving more processes in stars with fast spin or external tides. Next, there are periodic features: not only oscillations, but also convective cells and starspots, which appear to transit across a star as its spins, and exoplanets that really do transit across the star. Then, there are transients like flares. Current optical interferometers provide synthetic apertures of a few hundred metres and angular resolutions down to about nanoradian ($\simeq 0.2\,$milliarcsecond), enough to resolve some of the above features on the nearest upper main-sequence stars, giants and supergiants. Ongoing projects aims to km-scale synthetic apertures, enough to measure the radius of the nearest white dwarf. In this White Paper we briefly discuss what could be observed with synthetic apertures over $\sim20\,$km -- resolving detail on white dwarfs at the level currently possible on supergiants.
format	Preprint
id	arxiv_https___arxiv_org_abs_2512_11005
institution	arXiv
publishDate	2025
record_format	arxiv
spellingShingle	Stellar physics at sub-nanoradian angular resolution Batista, P. Biteau, J. Carlile, C. Cortina, J. Della Volpe, D. Dravins, D. Fiori, M. Funk, S. Guerin, W. Hassan, T. Ingenhütt, C. Martínez, I. Jiménez Kaiser, R. Koziol, G. Lai, O. Luce, Q. Lyard, E. Mirzoyan, R. Mitchell, A. W. M. Nomerotski, A. Produit, N. Raiola, A. Saha, P. Schweizer, T. Sliusar, V. Spolon, A. Stanic, L. Walter, R. Zampieri, L. von Zanthier, J. Zmija, A. Aufdenberg, J. Bender, C. F. Hermes, J. J. Kieda, D. Lisa, M. Mueninghoff, A. Rai, K. N. van Tilburg, K. Instrumentation and Methods for Astrophysics Earth and Planetary Astrophysics Solar and Stellar Astrophysics Many stars -- if they could be imaged with enough angular resolution -- would exhibit features expected from theory but not possible to extract from spectra. We may group these by increasing complexity as follows. First, smooth variations in brightness across the surface, resembling solar limb darkening but much more prominent and involving more processes in stars with fast spin or external tides. Next, there are periodic features: not only oscillations, but also convective cells and starspots, which appear to transit across a star as its spins, and exoplanets that really do transit across the star. Then, there are transients like flares. Current optical interferometers provide synthetic apertures of a few hundred metres and angular resolutions down to about nanoradian ($\simeq 0.2\,$milliarcsecond), enough to resolve some of the above features on the nearest upper main-sequence stars, giants and supergiants. Ongoing projects aims to km-scale synthetic apertures, enough to measure the radius of the nearest white dwarf. In this White Paper we briefly discuss what could be observed with synthetic apertures over $\sim20\,$km -- resolving detail on white dwarfs at the level currently possible on supergiants.
title	Stellar physics at sub-nanoradian angular resolution
topic	Instrumentation and Methods for Astrophysics Earth and Planetary Astrophysics Solar and Stellar Astrophysics
url	https://arxiv.org/abs/2512.11005