The Cliff (astronomical object)
Compact extragalactic object
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The Cliff (RUBIES-UDS-154183) is a compact extragalactic object observed as a little red dot with an exceptional (and cliff-like) Balmer jump. It was discovered as part of the James Webb Space Telescope's Red Unknowns: Bright Infrared Extragalactic Survey (RUBIES) in 2024 in the Ultra Deep Survey (UDS). Detailed spectrographic study suggests that it may be a black hole star.[2][3][1][4]
Object typeLittle red dot
Other designationsVANDELS UDS 024647, HSCS J021738-050747, RUBIES-UDS-154183, CANDELS UDS F160W J021738.59-050746.9, ZFOURGE UDS 18793, [GGF2013] 24647, [SWM2014] UDS 43002
02h 17m 38.58s
NIRSpec/PRISM spectrum of The Cliff. The orange points show NIRCam and MIRI photometry.[1] | |
| Object type | Little red dot |
|---|---|
| Other designations | VANDELS UDS 024647, HSCS J021738-050747, RUBIES-UDS-154183, CANDELS UDS F160W J021738.59-050746.9, ZFOURGE UDS 18793, [GGF2013] 24647, [SWM2014] UDS 43002 |
Observation data (Epoch J2000) | |
| Constellation | Cetus |
| 02h 17m 38.58s | |
| Declination | −05° 07′ 46.79″ |
| Redshift | 3.548 |
26.718, 25.814, 25.505, 25.197, 24.7611, 23.957, 23.23, 27.783, 25.3882, 25.4561  | |
A spectroscopically similar object, MoM-BH*-1, was reported contemporaneously by an overlapping team, and subsequent observations of other little red dots have provided further evidence for the dense-gas, accreting-black-hole interpretation.[5][6][7]
