J/PASP/137/A4402 HWO Target Stars and Systems 2025 list (TSS25) (Tuchow+, 2025)
HWO Target Stars and Systems: A Prioritized Community List of Potential Stellar
Targets for the Habitable Worlds Observatory's ExoEarth Survey.
Tuchow N.W., Harada C.K., Mamajek E.E., Tanner A., Hinkel N.R., Belikov R.,
Sirbu D., Ciardi D.R., Stark C.C., Morgan R.M., Savransky D., Turmon M.
<Publ. Astron. Soc. Pac. 137, 104402 (2025)>
=2025PASP.137.a4402T 2025PASP.137.a4402T (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Optical
Keywords: Direct imaging - Planet hosting stars - Stellar properties -
Exoplanets - Habitable planets
Abstract:
The HWO Target Stars and Systems 2025 (TSS25) list is a
community-developed catalog of potential stellar targets for the
Habitable Worlds Observatory (HWO) in its survey to directly image
Earth-sized planets in the habitable zone. The TSS25 list categorizes
potential HWO targets into priority tiers based on their likelihood to
be surveyed and the necessity of obtaining observations of their
stellar properties prior to the launch of the mission. This target
list builds upon previous efforts to identify direct imaging targets
and incorporates the results of multiple yield calculations assessing
the science return of current design concepts for HWO. The TSS25 list
identifies a sample of target stars that are likely to be observed by
HWO (Tiers 1 and 2), independent of assumptions about the mission's
final architecture. These stars should be the focus of community
precursor science efforts in order to mitigate risks and maximize the
science output of HWO. This target list is publicly available and is a
living catalog that will be continually updated leading up to the
mission.
Description:
Unless specified, all astrophysical properties listed are from the
HPIC 1.0 (Tuchow et al., 2024AJ....167..139T 2024AJ....167..139T, Cat. J/AJ/167/139a).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list2025.dat 307 12944 HWO Target Stars and Systems 2025 list (TSS25)
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See also:
J/AJ/167/139 : HPIC catalog & potential contaminants from Gaia (Tuchow+, 2024)
Byte-by-byte Description of file: list2025.dat
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Bytes Format Units Label Explanations
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1- 28 A28 --- Name Primary object identifier given by HPIC name
(star_name)
30 I1 --- TSStier Highest priority tier that an object belongs to
(TSS_tier)
32- 46 F15.11 deg RAdeg Right ascension (J2000) (ra)
48- 62 F15.11 deg DEdeg Declination (J2000) (dec)
64- 85 F22.16 mas/yr pmRA ? Proper motion in RA (sy_pmra)
87-108 F22.16 mas/yr pmDE ? Proper motion in DE (sy_pmdec)
110-119 I10 --- TIC ? Tess Input Catalog ID (tic_id)
121-139 I19 --- GaiaDR3 ? Gaia DR3 ID (gaiadr3id)
141-146 I6 --- HIP ? Hipparcos ID (hip_name)
148-157 A10 --- HD Henry Draper Catalog ID (hd_name)
159-181 A23 --- 2MASS 2MASS ID (tm_name)
183-192 A10 --- GJ Gliese designation (gj_name)
194-224 A31 --- Simbad Name in the CDS Simbad database (simbad_name)
226-244 F19.15 mas plx ? Parallax (sy_plx)
246-264 F19.16 pc Dist ? Distance (sy_dist)
266-287 E22.14 [Lsun] logLum ? log10 stellar luminosity (st_lum)
289-307 F19.16 mag Vmag ? Johnson V mag (sy_vmag)
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Acknowledgements:
Noah Tuchow, nwtuchow(at)arizona.edu
References:
Tuchow et al., 2024AJ....167..139T 2024AJ....167..139T, Cat. J/AJ/167/139
(End) Patricia Vannier [CDS] 25-Sep-2025