Effect of Local Environment on Ly α Line Profile in DESI/ODIN LAEs

@article{uzsoy2026effect,
  title = {{Effect of Local Environment on Ly α Line Profile in DESI/ODIN LAEs}},
  author = {Ana Sofía M. Uzsoy and Arjun Dey and Anand Raichoor and Douglas P. Finkbeiner and Vandana Ramakrishnan and Kyoung-Soo Lee and Eric Gawiser and Jessica Nicole Aguilar and Steven Ahlen and Abhijeet Anand and Davide Bianchi and David Brooks and Todd Claybaugh and Axel de la Macorra and Peter Doel and Simone Ferraro and Nicole M. Firestone and Andreu Font-Ribera and Jaime E. Forero-Romero and Enrique Gaztañaga and Lucia Guaita and Gaston Gutierrez and Hiram K. Herrera-Alcantar and Klaus Honscheid and Ho Seong Hwang and Mustapha Ishak and Dick Joyce and David Kirkby and Theodore Kisner and Anthony Kremin and Ofer Lahav and Claire Lamman and Martin Landriau and Laurent Le Guillou and Marc Manera and Ramon Miquel and John Moustakas and Andrea Muñoz-Gutiérrez and Seshadri Nadathur and Nathalie Palanque-Delabrouille and Will Percival and Claire Poppett and Francisco Prada and Ignasi Pérez-Ràfols and Graziano Rossi and Eusebio Sanchez and David Schlegel and Michael Schubnell and Hee-Jong Seo and Joseph Harry Silber and Hyunmi Song and David Sprayberry and Gregory Tarlé and Benjamin Alan Weaver and Hu Zou},
  journal = {The Astrophysical Journal},
  year = {2026},
  month = oct,
  doi = {10.3847/1538-4357/aea6d8},
  url = {https://iopscience.iop.org/article/10.3847/1538-4357/aea6d8},
  note = {CC BY 4.0},
}

TY  - JOUR
TI  - Effect of Local Environment on Ly α Line Profile in DESI/ODIN LAEs
AU  - Ana Sofía M. Uzsoy
AU  - Arjun Dey
AU  - Anand Raichoor
AU  - Douglas P. Finkbeiner
AU  - Vandana Ramakrishnan
AU  - Kyoung-Soo Lee
AU  - Eric Gawiser
AU  - Jessica Nicole Aguilar
AU  - Steven Ahlen
AU  - Abhijeet Anand
AU  - Davide Bianchi
AU  - David Brooks
AU  - Todd Claybaugh
AU  - Axel de la Macorra
AU  - Peter Doel
AU  - Simone Ferraro
AU  - Nicole M. Firestone
AU  - Andreu Font-Ribera
AU  - Jaime E. Forero-Romero
AU  - Enrique Gaztañaga
AU  - Lucia Guaita
AU  - Gaston Gutierrez
AU  - Hiram K. Herrera-Alcantar
AU  - Klaus Honscheid
AU  - Ho Seong Hwang
AU  - Mustapha Ishak
AU  - Dick Joyce
AU  - David Kirkby
AU  - Theodore Kisner
AU  - Anthony Kremin
AU  - Ofer Lahav
AU  - Claire Lamman
AU  - Martin Landriau
AU  - Laurent Le Guillou
AU  - Marc Manera
AU  - Ramon Miquel
AU  - John Moustakas
AU  - Andrea Muñoz-Gutiérrez
AU  - Seshadri Nadathur
AU  - Nathalie Palanque-Delabrouille
AU  - Will Percival
AU  - Claire Poppett
AU  - Francisco Prada
AU  - Ignasi Pérez-Ràfols
AU  - Graziano Rossi
AU  - Eusebio Sanchez
AU  - David Schlegel
AU  - Michael Schubnell
AU  - Hee-Jong Seo
AU  - Joseph Harry Silber
AU  - Hyunmi Song
AU  - David Sprayberry
AU  - Gregory Tarlé
AU  - Benjamin Alan Weaver
AU  - Hu Zou
PY  - 2026
DA  - 2026/10/09
JO  - The Astrophysical Journal
DO  - 10.3847/1538-4357/aea6d8
UR  - https://iopscience.iop.org/article/10.3847/1538-4357/aea6d8
AB  - Ly α emitters (LAEs) are star-forming galaxies with significant Ly α emission and are often used as tracers of large-scale structure at high redshift. We explore the relationship between the Ly α line profile and environmental density with spectroscopy from the Dark Energy Spectroscopic Instrument (DESI) of LAEs selected with narrowband photometry through the One-hundred-deg ² DECam Imaging in Narrowbands (ODIN) survey. We use LAE surface density maps in the N419 ( z ∼ 2.45) and N501 ( z ∼ 3.12) narrow bands to probe the relationship between local environmental density and the Ly α line profile. In both narrow bands, we stack the LAE spectra in bins of environmental density and inside and outside of protocluster regions. The N501 data show ∼15% higher Ly α line luminosity for galaxies in protoclusters, suggesting increased star formation in these regions. However, the line luminosity is not appreciably greater in protocluster galaxies in the N419 band, suggesting a potential redshift evolution of this effect. The shape of the line profile itself does not vary with environmental density, suggesting that line shape changes are caused by local effects independent of a galaxy’s environment. These data indicate a potential relationship between LAE local environmental density, ionized gas distribution, and Ly α line luminosity.
SN  - 0004-637X
SN  - 1538-4357
ER  -