The SPHEREx Target List of Ice Sources (SPLICES)
- Creators
- Ashby, Matthew L. N.
- Hora, Joseph L.
- Lakshmipathaiah, Kiran
- Vig, Sarita
- Gorthi, Rama Krishna Sai Subrahmanyam
- Kang, Miju
- Tolls, Volker
- Melnick, Gary J.
- Werner, Michael W.
- Crill, Brendan P.
- Masters, Daniel C.
- Contreras Peña, Carlos
- Lee, Jeong-Eun
- Kim, Jaeyeong
- Lee, Ho-Gyu
- Yoon, Sung-Yong
- Yang, Soung-Chul
- Flagey, Nicholas
- Mennesson, Bertrand
Abstract
One of the primary objectives of the SPHEREx mission is to understand the origin of molecules such as H₂O, CO₂, and other volatile compounds at the early stages of planetary system formation. Because the vast majority of these compounds—typically exceeding 95%—exist in the solid phase rather than the gaseous phase in the systems of concern here, the observing strategy planned to characterize them is slightly unusual. Specifically, SPHEREx will target highly obscured sources throughout the Milky Way, and observe the species of concern in absorption against background illumination. SPHEREx spectrophotometry will yield ice column density measurements for millions of obscured Milky Way sources of all ages and types. By correlating those column densities with source ages, the SPHEREx mission will shed light on whether those molecules were formed in situ along with their nascent stellar systems, or whether instead they formed elsewhere and were introduced into those systems after their formation. To that end, this work describes version 7.1 of the SPHEREx target List of ICE Sources (SPLICES) for the community. It contains 8.6 × 10⁶ objects brighter than W2 ∼ 12 Vega mag over much of the sky, principally within a broad strip running the length of the Milky Way midplane, but also within high-latitude molecular clouds and even the Magellanic Clouds.
Additional Information
© 2023. The Author(s). Published by the American Astronomical Society. Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. Some of the computations carried out in the preparation of this paper were run on the FASRC Cannon cluster supported by the FAS Division of Science Research Computing Group at Harvard University. The authors are grateful to the Finkbeiner group at the Center for Astrophysics for kind assistance with the source matching; the helpful advice of C. Zucker and E. Schlafly is especially appreciated. This publication makes use of data products from the Wide-field Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles, and the Jet Propulsion Laboratory/California Institute of Technology, funded by the National Aeronautics and Space Administration. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. This work is based in part on archival data obtained with the Spitzer Space Telescope, which was operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. M.K. was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2015R1C1A1A01052160). M.L.N.A. is a Visiting Astronomer at the Infrared Telescope Facility, which is operated by the University of Hawaii under contract 80HQTR19D0030 with the National Aeronautics and Space Administration. J.-E.L. and C.C.P. were supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT grant No. 2021R1A2C1011718). Facilities: IRTF - , CTIO:2MASS - , WISE - , Spitzer (IRAC) - , Gaia. - Software: TOPCAT (Taylor 2005), Spextool (Cushing et al. 2014).Attached Files
Published - Ashby_2023_ApJ_949_105.pdf
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Additional details
- Eprint ID
- 121925
- Resolver ID
- CaltechAUTHORS:20230615-812913000.25
- NASA/JPL/Caltech
- NRF-2015R1C1A1A01052160
- National Research Foundation of Korea
- 80HQTR19D0030
- NASA
- 2021R1A2C1011718
- National Research Foundation of Korea
- Created
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2023-06-27Created from EPrint's datestamp field
- Updated
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2023-06-27Created from EPrint's last_modified field
- Caltech groups
- Infrared Processing and Analysis Center (IPAC)