The James Webb Space Telescope Feed

Target Name: HH212-POS2 Title: Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet: Epoch 2 Instrument: NIRCAM/IMAGE Filters: F444W;F470N Start Time: 11/6/2023 12:41:54 AM Obs Time: 1803.78(s) Proposal ID: 2771

Target Name: HH212-POS2 Title: Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet: Epoch 2 Instrument: NIRCAM/IMAGE Filters: F444W;F466N Start Time: 11/6/2023 1:08:33 AM Obs Time: 1803.78(s) Proposal ID: 2771

Target Name: HH212-POS2 Title: Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet: Epoch 2 Instrument: NIRCAM/IMAGE Filters: F444W Start Time: 11/6/2023 2:03:08 AM Obs Time: 1803.78(s) Proposal ID: 2771

Target Name: HH212-POS2 Title: Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet: Epoch 2 Instrument: NIRCAM/IMAGE Filters: F356W Start Time: 11/6/2023 1:35:56 AM Obs Time: 1803.78(s) Proposal ID: 2771

Target Name: HH212-POS2 Title: Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet: Epoch 2 Instrument: NIRCAM/IMAGE Filters: F212N Start Time: 11/6/2023 12:41:53 AM Obs Time: 3607.56(s) Proposal ID: 2771

Target Name: HH212-POS2 Title: Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet: Epoch 2 Instrument: NIRCAM/IMAGE Filters: F200W Start Time: 11/6/2023 2:03:08 AM Obs Time: 1803.78(s) Proposal ID: 2771

Target Name: HH212-POS2 Title: Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet: Epoch 2 Instrument: NIRCAM/IMAGE Filters: F150W Start Time: 11/6/2023 1:35:56 AM Obs Time: 1803.78(s) Proposal ID: 2771

Target Name: HH212-POS1 Title: Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet: Epoch 2 Instrument: NIRCAM/IMAGE Filters: F444W;F470N Start Time: 11/5/2023 8:40:18 PM Obs Time: 1803.78(s) Proposal ID: 2771

Target Name: HH212-POS1 Title: Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet: Epoch 2 Instrument: NIRCAM/IMAGE Filters: F444W;F466N Start Time: 11/5/2023 9:10:22 PM Obs Time: 1803.78(s) Proposal ID: 2771

Target Name: HH212-POS1 Title: Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet: Epoch 2 Instrument: NIRCAM/IMAGE Filters: F444W Start Time: 11/5/2023 10:07:59 PM Obs Time: 1803.78(s) Proposal ID: 2771

Target Name: HH212-POS1 Title: Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet: Epoch 2 Instrument: NIRCAM/IMAGE Filters: F356W Start Time: 11/5/2023 9:40:36 PM Obs Time: 1803.78(s) Proposal ID: 2771

Target Name: HH212-POS1 Title: Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet: Epoch 2 Instrument: NIRCAM/IMAGE Filters: F212N Start Time: 11/5/2023 8:40:18 PM Obs Time: 3607.56(s) Proposal ID: 2771

Target Name: HH212-POS1 Title: Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet: Epoch 2 Instrument: NIRCAM/IMAGE Filters: F200W Start Time: 11/5/2023 10:07:59 PM Obs Time: 1803.78(s) Proposal ID: 2771

Target Name: HH212-POS1 Title: Structure, Excitation, and Proper Motions in the Symmetric HH212 Jet: Epoch 2 Instrument: NIRCAM/IMAGE Filters: F150W Start Time: 11/5/2023 9:40:36 PM Obs Time: 1803.78(s) Proposal ID: 2771

Thomas Carpentier | HH212

Thomas Carpentier | HH212

landru79 | James #Webb Space Telescope Structure, excitation, and proper motions in the symmetric HH212 jet date_obs: 2022-11-07 targname: #HH212-POS1 instrume: #NIRCAM NASA/ESA/CSA/STScI/j. Roger

landru79 | James #Webb Space Telescope Structure, excitation, and proper motions in the symmetric HH212 jet date_obs: 2022-11-07 targname: #HH212-POS1 instrume: #NIRCAM NASA/ESA/CSA/STScI/j. Roger

Thomas | HH212 by the #JWST! The data of this observation by Mark McCaughrean was made available this morning, and I processed it right away! At the center is a new born star with jets emerging from it! Only three filters were used: f210M (B), f335M (G), and f460M (R)

Target Name: HH212-POS2 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE Filters: F444W;F470N Start Time: 11/7/2022 4:17:45 PM Obs Time: 1803.78(s) Proposal ID: 1258

Target Name: HH212-POS2 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE Filters: F444W;F466N Start Time: 11/7/2022 4:45:29 PM Obs Time: 1803.78(s) Proposal ID: 1258

Target Name: HH212-POS2 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE Filters: F150W2;F164N Start Time: 11/7/2022 5:13:57 PM Obs Time: 1803.78(s) Proposal ID: 1258

Target Name: HH212-POS2 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE Filters: F460M Start Time: 11/7/2022 5:42:02 PM Obs Time: 1803.78(s) Proposal ID: 1258

Target Name: HH212-POS2 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE Filters: F335M Start Time: 11/7/2022 5:13:57 PM Obs Time: 1803.78(s) Proposal ID: 1258

Target Name: HH212-POS2 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE Filters: F212N Start Time: 11/7/2022 4:17:45 PM Obs Time: 3607.56(s) Proposal ID: 1258

Target Name: HH212-POS2 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE Filters: F210M Start Time: 11/7/2022 5:42:02 PM Obs Time: 1803.78(s) Proposal ID: 1258

Target Name: HH212-POS2 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE (F335M) Meta Release: 11/7/2022 5:28:26 PM Last Modified: 11/8/2023 6:42:15 AM Proposal ID: 1258 (Archived)

Target Name: HH212-POS2 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE (F444W;F470N) Meta Release: 11/7/2022 4:36:54 PM Last Modified: 11/8/2023 6:41:46 AM Proposal ID: 1258 (Archived)

Target Name: HH212-POS2 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE (F212N) Meta Release: 11/7/2022 4:52:07 PM Last Modified: 11/8/2023 6:41:39 AM Proposal ID: 1258 (Archived)

Target Name: HH212-POS2 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE (F210M) Meta Release: 11/7/2022 7:44:28 PM Last Modified: 11/8/2023 6:41:26 AM Proposal ID: 1258 (Archived)

Target Name: HH212-POS2 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE (F444W;F470N) Meta Release: 11/7/2022 6:34:08 PM Last Modified: 11/8/2023 6:41:01 AM Proposal ID: 1258 (Archived)

Target Name: HH212-POS1 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE Filters: F444W;F470N Start Time: 11/7/2022 12:19:28 PM Obs Time: 1803.78(s) Proposal ID: 1258

Target Name: HH212-POS1 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE Filters: F444W;F466N Start Time: 11/7/2022 12:47:23 PM Obs Time: 1803.78(s) Proposal ID: 1258

Target Name: HH212-POS1 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE Filters: F150W2;F164N Start Time: 11/7/2022 1:15:50 PM Obs Time: 1803.78(s) Proposal ID: 1258

Target Name: HH212-POS1 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE Filters: F460M Start Time: 11/7/2022 1:43:45 PM Obs Time: 1803.78(s) Proposal ID: 1258

Target Name: HH212-POS1 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE Filters: F335M Start Time: 11/7/2022 1:15:50 PM Obs Time: 1803.78(s) Proposal ID: 1258

Target Name: HH212-POS1 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE Filters: F212N Start Time: 11/7/2022 12:19:28 PM Obs Time: 3607.56(s) Proposal ID: 1258

Target Name: HH212-POS1 Title: Structure, excitation, and proper motions in the symmetric HH212 jet Instrument: NIRCAM/IMAGE Filters: F210M Start Time: 11/7/2022 1:43:45 PM Obs Time: 1803.78(s) Proposal ID: 1258

Mark McCaughrean | These phenomena along with many others form one of the common threads through our Cycle 1 # JWST observations of star formation in Orion, HH211, & HH212. One question that often arises is that of relative scale: how big are these images & outflows compared to each other? So just for fun for those who've stuck this thread out to the end, here's a very quick & crappy montage showing how HH211 & HH212 would look if placed in the Orion Nebula, scaling for distance 🙂 Enjoy 👍

Mark McCaughrean | JWST image of the HH212 protostellar jet

Mark McCaughrean | But here’s the thing: because we have all of these older images of HH212 … we can see it moving ?? That is, because the material is moving outwards from the protostar we can see the jet expand over time. It’s easily visible in this 22 year timelapse that combines three VLT images from 2000, 2007, 2018, & then the 2022 JWST image. Measuring the changes, we can determine the expansion speed as 50-150km/s in different parts of the outflow.

Mark McCaughrean | And to show the change in quality over time, here’s the previous best image of HH212, which we made with the VLT about 20 years ago, just in the 2.12 micron H2 line, compared with the new JWST image. Pretty impressive improvement when you get to use a 6.5m cryogenic infrared telescope in space

Mark McCaughrean | We (Hans Zinnecker, John Rayner, & me) first discovered HH212 in 1993 using the NASA IRTF on Maunkea in Hawai’i. We’ve observed it many times since on increasingly large telescopes & with better & better infrared cameras & better resolution, including the Calar Alto 3.5m in Spain & the ESO VLT 8.2m on Paranal, Chile. Safe to say though, the #JWST images blow all that away Here’s a montage with HH212 oriented “correctly”, ie with north up & east left.

Mark McCaughrean | Despite all this gas & dust however, we know that the protostar at the heart of HH212 is a fairly isolated, not surrounded by big dense molecular clouds. How do we know that? Because there are galaxies *everywhere* in this image, strewn across the image in the far distance. If there was a dense cloud, we wouldn’t see them. Here’s a small crop showing a nice group: pan & zoom & you’ll see loads more.

Mark McCaughrean | To guide the eye, here’s a rotated and annotated version of the JWST image of HH212. It shows the location of the central (invisible) protostar and then the quasi-symmetric series of knots and bowshocks caused by periodic expulsions of material from both poles of the protostar. There are two other protostars in the region marked in blue. 3/

Mark McCaughrean | A timelapse movie of the HH212 protostellar jet