A Possible Protocluster of Galaxies Serendipitously Discovered in the Field of an Intermediate-redshift Post-starburst Galaxy | CU Experts

Abstract; ; We present the serendipitous discovery of an overdensity of submillimeter galaxies in the field of SDSS J0909-0108, a massive; z; ∼ 0.7 post-starburst galaxy from the SQuIGG; ; ; ; ; ; ; ; L; ; ; →; ; ; ; ; E survey. Atacama Large Millimeter/submillimeter Array (ALMA) observations at 870 ; μ; m and 2 mm reveal six galaxies within a 35; ″; region with flux ratios consistent with emission from dust. Given the rarity of 870 ; μ; m sources and the small field-of-view of ALMA, we speculate that some of these sources are physically associated. None of the sources are at the same redshift as the post-starburst, and four do not have spectroscopic redshifts. We suggest that follow-up optical and/or ALMA observations be carried out to measure redshifts for the galaxies in this potential protocluster environment.;

VIVO