2025ApJ...993...82D


Query : 2025ApJ...993...82D

2025ApJ...993...82D - Astrophys. J., 993, 82 (2025/November-1)

A Dedicated System for Coordinated Radio and Optical Monitoring of the Space Weather of Young, Solar-type Stars.

DAVIS I., HALLINAN G., SAINI N., LAW C., HUANG Y., BURRUSS R., ZOLKOWER J., BAKER J., CORCORAN C., HEFFNER C., PLANT K., KOSOGOROV N., ANDERSON M., ISELLA A., D'ADDARIO L., SHI J., HELLBOURG G., HODGE D., WEINREB S., MAHESH N., BYRNE R., HICKISH J., HOBBS R., VIRGIN M., KEMBY G., POSNER C., KLINEFELTER J.T., CATHA M., LAMB J., HODGES M., HARNACH C., PRAYAG V., WOODY D., RIZO A., ROMERO-WOLF A., BOWMAN J.D., JACOBS D.C., KOLOPANIS M., ELDER K., VYDULA A.K., GARY D., CHEN B., MONDAL S., ZHANG P., YU S., CHHABRA S., O'DONNELL B., DOWELL J. and TAYLOR G.

Abstract (from CDS):

Low-frequency radio emission in the form of type II and III bursts is a direct indicator of plasma motion in the solar corona and interplanetary medium. However, detecting equivalent events on solar analogs requires thousands of observing hours and complementary multiwavelength observations to constrain the origin of the radio emission. To address this, we have begun the Study of Space Weather Around Young Suns (SWAYS), a multiwavelength program for monitoring space weather around young, solar-type stars. This program currently focuses on five solar-type stars spanning 100-800 Myr in age. It includes a dedicated observing scheme from the recently upgraded Owens Valley Radio Observatory (OVRO) Long Wavelength Array (LWA) operating at 13-86 MHz to search for stellar analogs of solar type II and III bursts. We have built the optical photometry instrument Flarescope to operate simultaneously with OVRO-LWA observations to investigate whether radio bursts are accompanied by magnetic reconnection events. We analyze the performance based on a 1 hr observation of π1 UMa, which shows that Flarescope can reach submillimagnitude precision through nondifferential photometry on π1 UMa in 60 s integration times when diffusing the light with engineered diffusers. A small field of OVRO-LWA cross-correlated data centered on π1 UMa reaches a noise level of 740 mJy at 10 s integration time, consistent with confusion noise. With this precision, we should be able to detect large optical flares and related radio bursts that may indicate accompanying coronal mass ejections and energetic particle events. In this paper, we present the design, framework, and performance of the SWAYS program.

Abstract Copyright: © 2025. The Author(s). Published by the American Astronomical Society.

Journal keyword(s): Astronomical instrumentation - Interferometers - Telescopes - Photometer - Stellar activity - Transient sources - Radio transient sources - Optical flares

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026
#notes
1 * kap01 Cet BY* 03 19 21.6964175772 +03 22 12.714979884 5.71 5.52 4.85 4.27 3.91 G5V 948 0
2 * eps Eri BY* 03 32 55.8444911587 -09 27 29.739493865 5.19 4.61 3.73 3.00 2.54 K2V 2073 1
3 M 1 SNR 05 34 31.8 +22 01 03           ~ 6516 1
4 * chi01 Ori SB* 05 54 22.9829893 +20 16 34.222038 5.08 5.00 4.40 3.90 3.59 G0V 895 0
5 3C 204 QSO 08 37 45.0013678200 +65 13 35.305376376   18.76 18.21     ~ 184 1
6 Gaia DR3 1092545573075703680 * 08 38 48.2781825406 +65 01 04.725262885           ~ 1 0
7 * pi.01 UMa BY* 08 39 11.7046112880 +65 01 15.263122512 6.33 6.26 5.64 5.12 4.79 G0.5V 608 0
8 TYC 4133-532-1 * 08 39 28.3697816112 +65 04 28.233731172   12.52 11.78     ~ 1 0
9 TYC 4133-1453-1 * 08 39 52.8500995512 +65 03 23.260735008   12.0 11.5     ~ 1 0
10 4C 63.11 Rad 08 51 01.096 +63 43 41.23           ~ 5 1
11 V* EK Dra BY* 14 39 00.2104038120 +64 17 29.979649860   8.243 7.604     G5VFe-0.7CH-1(k) 500 0
12 MCG+07-41-003 Bla 19 59 28.35656837 +40 44 02.0972325   16.22 15.10     ~ 2537 2
13 NGC 7000 Cl* 20 58 47 +44 19.8           ~ 427 0
14 NAME Cas A SNR 23 23 26.0 +58 48 41     14.30     ~ 3033 1
15 * chi Ori err ~ ~           ~ 4 3

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