IRTF Data Archive Program Information

# # Program information file # PROGRAM_ID 2023A004 PROGRAM_TITLE Infrared-selected Dust-reddened Quasars as Probes of Feedback and Galaxy Evolution PROGRAM_INV1 Eilat Glikman PROGRAM_INV2 Mark Lacy PROGRAM_INV3 Stephanie LaMassa PROGRAM_INV4 C. Meg Urry PROGRAM_INV5 S. George Djorgovski PROGRAM_SCICAT extra-galactic PROGRAM_ABSTRACT_BEG Dust-reddened quasars represent a transitional phase in the merger-driven scenario of quasar/galaxy co-evolution. Early work on red quasars used radio selection to avoid contamination from low mass Galactic stars, however recent work has shown that red quasars have radio properties that differ from blue, unreddened quasars. This means that the properties of radio selected red quasars may bias our understanding of the population as a whole. We need a better understanding of the relationship among radio emission, luminosity, and reddening, to gain a holistic picture of the role of quasars in galaxy evolution. Mid-infrared color selection identifies quasars with minimal sensitivity to reddening, regardless of their radio properties, thus offering an opportunity to select complete samples of red and blue quasars to better constrain their properties. These radio-independent samples can thus probe the source of radio emission in red quasars, which may be due to dusty AGN-driven winds, rather than jets. Much of the work done so far is based on small samples with a shallow flux limit [K < 14.7]. Here, we expand the sample to fainter K-band magnitudes and propose to spectroscopically confirm red quasar candidates with SpeX. PROGRAM_ABSTRACT_END