Radio emission from stars can be used, for example, to study ionized winds or stellar flares. The radio emission is faint and studies have been limited to few objects. The Square Kilometer Array (SKA) brings a survey ability to the topic of radio stars. In this paper we investigate what the SKA can detect, and what sensitivity will be required for deep surveys of the stellar Milky Way. We focus on the radio emission from OB stars, Be stars, flares from M dwarfs, and Ultra Compact HII regions. The stellar distribution in the Milky Way is simulated using the Besançon model, and various relations are used to predict their radio flux. We find that the full SKA will easily detect all UltraCompact HII regions. At the limit of 10 nJy at 5 GHz, the SKA can detect 1500 Be stars and 50 OB stars per square degree, out to several kpc. It can also detect flares from 4500 M dwarfs per square degree. At 100 nJy, the numbers become about 8 times smaller. SKA surveys of the Galactic plane should be designed for high sensitivity. Deep imaging should consider the significant number of faint flares in the field, even outside the plane of the Milky Way.

中文翻译：

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SKA的广播之星

恒星的无线电发射可用于例如研究电离风或恒星耀斑。无线电发射微弱，研究仅限于很少的物体。平方公里阵列（SKA）为无线电星的话题带来了调查能力。在本文中，我们调查了SKA可以检测到的内容，以及对星状银河系进行深度调查所需的灵敏度。我们专注于OB恒星，Be恒星，M矮星的耀斑和超紧凑HII区域的无线电发射。使用贝桑松模型模拟了银河系中的恒星分布，并使用各种关系来预测它们的辐射通量。我们发现完整的SKA可以轻松检测所有UltraCompact HII区域。在5 GHz时，在10 nJy的极限下，SKA可以检测到每平方度1500 Be恒星和50 OB恒星，最高可达数kpc。它也可以检测每平方度4500 M个矮星的耀斑。在100 nJy时，数字变小了大约8倍。SKA对银河系平面的测量应设计成具有高灵敏度。深度成像应考虑到野外存在大量微弱的耀斑，即使在银河系平面之外也是如此。