If the photo is from a publication, that implies that it was printed (like from a printing press). If that's true, then what you are likely seeing is the result of how presses work - to wit line screens. Images printed that way are made up of little dots. Often times, at varying magnifications, those dots produce an anomaly called Moiré patters.
Most scan software has a feature called "descreening" which removes, to some extent, the dots by smoothing or blurring them.
There are also various techniques that one can use to remove them manually. Often they include a gaussian blur followed by an Unsharp Mask. If you were to do a google search on Moiré pattern removal in Photoshop, you would probably find abundant resources to help you remove them and produce an acceptable image.