SPT0615-JD

SPT0615-JD
SPT0615-JD (closer detailed image) using the NASA/ESA Hubble Space Telescope (the galaxy is located towards the upper left, to the right of the group of two stars and one galaxy)
Observation data (J2000 epoch)
ConstellationPictor[1]
Right ascension06h 15m 55.03s[2]
Declination−57° 46′ 19.56″[2]
Redshift9.9 [3]
Distance13.27 billion light-years (light travel time) [3]
31.4 billion light-years (comoving distance)
Characteristics
Mass~3 ×109[2] M☉
Size< 2,500 ly[2]
Apparent size (V)0.00065 x 0.00065
Other designations
RELICS SPT-CL J0615-5746 336, SCB2018 SPTJ0615-JD1

SPT0615-JD is a dwarf galaxy situated within the constellation Pictor, and is the farthest galaxy ever imaged by means of gravitational lensing, as of 2018.[1][3] Brett Salmon of the Space Telescope Science Institute in Baltimore was the lead scientist of the study of the galaxy.[2]

The galaxy was identified in the Hubble Space Telescope Reionization Lensing Cluster Survey (RELICS) and companion S-RELICS Spitzer program and is at the limits of Hubble's detection capabilities.[2] As a consequence of the effect of a gravitational field of a galaxy cluster of an extremely large size,[2] SPT-CL J0615-5746, (abbreviated to SPT0615),[1] situated at a distance closer to Earth, light from SPT0615-JD located at a further distance, is amplified and distorted (lensed – Einstein 1936; Khvolson 1924; Link 1936) on its motion to the Hubble telescope. This distortion causes the light from the galaxy to arrive as an image lengthened to an arc of about 2 arcseconds long.[2]

"JD" is short for "J-band Dropout" (the galaxy is not detected in the so-called J-band (F125W)[4] The observed image is of 13.3 billion years ago, indicating the galaxy existed when the universe was about only 500 million years in existence.[2] The galaxy is less than 2,500 light-years across.[2]

References

  1. ^ a b c I. Karachentsev et al., F. High et al. – Distant and ancient Hubble Space Telescope Retrieved 2019-06-10
  2. ^ a b c d e f g h i j (January 11, 2018) NASA's Great Observatories Team Up to Find Magnified and Stretched Image of Distant Galaxy Jet Propulsion Laboratory, Pasadena, California, Retrieved 2019-06-10
  3. ^ a b c Salmon, Brett; Coe, Dan; Bradley, Larry; Bradač, Marusa; Huang, Kuang-Han; Strait, Victoria; Oesch, Pascal; Paterno-Mahler, Rachel; Zitrin, Adi; Acebron, Ana; Cibirka, Nathália; Kikuchihara, Shotaro; Oguri, Masamune; Brammer, Gabriel B; Sharon, Keren; Trenti, Michele; Avila, Roberto J; Ogaz, Sara; Andrade-Santos, Felipe; Carrasco, Daniela; Cerny, Catherine; Dawson, William; Frye, Brenda L; Hoag, Austin; Jones, Christine; Mainali, Ramesh; Ouchi, Masami; Rodney, Steven A; Stark, Daniel; Umetsu, Keiichi (2018). "A Candidate z∼10 Galaxy Strongly Lensed into a Spatially Resolved Arc". The Astrophysical Journal. 864: L22. arXiv:1801.03103. doi:10.3847/2041-8213/aadc10. S2CID 78087820.
  4. ^ Daniel Coe with CLASH (PI Marc Postman) – Hubble Spies Most Distant Galaxy Yet Retrieved 2019-06-10

Additional reading