This add-on adds over 550 stars in NGC 55, one of the galaxies between our Local Group, and the Sculptor Group.
Over 100 Cepheid variables did not have spectral types on SIMBAD, so I (with Luke's help and formulae) calculated their spectral types from their V-I indexes.
Also, pretty much every single X-ray source listed on SIMBAD in NGC 55 is an X-ray binary, so I made every X-ray binary as a B-BH binary.
Lastly, because the galaxy is defined as an irregular in Celestia, half of the stellar distribution is outside the galaxy.
Populating WLM (and other galaxies) with REAL stars
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Gurren Lagann
- Posts: 434
- Joined: 31.01.2018
- Age: 18
- With us: 6 years 9 months
- Location: State of Rio de Janeiro, Brazil
- Attachments
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ngc_55.zip- (7.62 KiB) Downloaded 493 times
"The tomorrow we're trying to reach is not a tomorrow you had decided on!"
- Simon the Digger
"Nothing is impossible for me, as long I'm determinated to keep moving forward!"
"If other people aren't going to do it, I'm going to do it myself!"
- Me (Gurren)
Current major projects:
- Aur Cir
- Cel+
- Project Sisyphus
- Populating the Local Group
- An galaxy generator
- Simon the Digger
"Nothing is impossible for me, as long I'm determinated to keep moving forward!"
"If other people aren't going to do it, I'm going to do it myself!"
- Me (Gurren)
Current major projects:
- Aur Cir
- Cel+
- Project Sisyphus
- Populating the Local Group
- An galaxy generator
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TheLostProbe
- Posts: 218
- Joined: 07.05.2020
- Age: 18
- With us: 4 years 6 months
- Location: City of Port Phillip, Melbourne, Australia
epic
Added after 39 seconds:
and I was the first to download it
Added after 39 seconds:
and I was the first to download it
"Carbon stars with ancient satellites colonized by sentient fungi. Gas giants inhabited by vast meteorological intelligences. Worlds stretched thin across the membranes where the dimensions intersect... impossible to describe with our limited vocabulary."
- Dr. Wallace Breen
- Dr. Wallace Breen
Here is an update to the Draco Dwarf add-on. The main change is a new orbital definition for the symbiotic star [ALS82] C1, also known as Draco C1. The parameters come from Lewis et al. (2020): "Geometry of the Draco C1 Symbiotic Binary".
- Attachments
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- draco_dwarf.stc.zip
- (14.92 KiB) Downloaded 492 times
Hello everyone! I'm currently on hiatus from Celestia-related stuff, but in the meantime I have a small add-on. This adds the globular cluster in Wolf-Lundmark-Melotte (WLM). Parameters from Stephens et al. (2006): "WLM-1: An old, Nonrotating, Gravitationally Unperturbed, Highly Elliptical Extragalactic Globular Cluster".
Enjoy:
Enjoy:
- Attachments
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- globulars_wlm.dsc.zip
- (1.08 KiB) Downloaded 439 times
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Trolligi 112477
- Posts: 268
- Joined: 18.04.2020
- Age: 17
- With us: 4 years 7 months
- Location: London
Hi everyone, unfortunately still on hiatus (real life is busy!), but I made a small change to the Andromeda Galaxy globular clusters file. I added EXT8, which looks like a typical globular cluster but has a extremely low metallicity of [Fe/H] = −2.91 ± 0.04. SIMBAD does not have the name EXT8, so you'll have to search under the name M31GC J005314+413324 for this add-on. Where V-band measurements were lacking, I used the measurements in the F606W filter.
Parameters from Larsen et al. (2021): "Hubble Space Telescope imaging of the extremely metal-poor globular cluster EXT8 in Messier 31".
Enjoy:
Parameters from Larsen et al. (2021): "Hubble Space Telescope imaging of the extremely metal-poor globular cluster EXT8 in Messier 31".
Enjoy:
- Attachments
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- globulars_andromeda.dsc.zip
- (10.96 KiB) Downloaded 414 times
Hello everyone! I have updated the Andromeda Galaxy and Triangulum Galaxy add-ons. The changes are:
1. I have removed one foreground star 2MASS J01334671+3054550 and made RX J0133.0+3039 a high-mass X-ray binary, according to Lin et al. (2020): "Searching for Balmer-dominated Type Ia Supernova Remnants in M33".
2. I have improved spectral types for many red supergiant stars, based on either the spectral types or effective temperatures, and redefined MAC 1-427 and [MBH96] 217 to be binary stars, based on their composite spectral types. Parameters are from Massey et al. (2021): "The Red Supergiant Content of M31 and M33".
3. I also made LGGS J004438.75+415553.6 a binary, based on the object classification from Neugent (2021): "The Red Supergiant Binary Fraction as a Function of Metallicity in M31 and M33".
4. M33SSS J013410.82+303438.1, a duplicate of the famous VHK 83, has been removed.
Enjoy:
1. I have removed one foreground star 2MASS J01334671+3054550 and made RX J0133.0+3039 a high-mass X-ray binary, according to Lin et al. (2020): "Searching for Balmer-dominated Type Ia Supernova Remnants in M33".
2. I have improved spectral types for many red supergiant stars, based on either the spectral types or effective temperatures, and redefined MAC 1-427 and [MBH96] 217 to be binary stars, based on their composite spectral types. Parameters are from Massey et al. (2021): "The Red Supergiant Content of M31 and M33".
3. I also made LGGS J004438.75+415553.6 a binary, based on the object classification from Neugent (2021): "The Red Supergiant Binary Fraction as a Function of Metallicity in M31 and M33".
4. M33SSS J013410.82+303438.1, a duplicate of the famous VHK 83, has been removed.
Enjoy:
- Attachments
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- triangulum_galaxy.stc.zip
- (91.02 KiB) Downloaded 397 times
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- andromeda_galaxy.stc.zip
- (61.79 KiB) Downloaded 384 times
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Carcharodontosaurus
- Posts: 9
- Joined: 03.01.2022
- With us: 2 years 10 months
This is a small addon with only 12 stars from And V
- Andv.rar
- (504 Bytes) Downloaded 379 times
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Trolligi 112477
- Posts: 268
- Joined: 18.04.2020
- Age: 17
- With us: 4 years 7 months
- Location: London
Leo P
viewtopic.php?p=157474&sid=08c1b4e37313afaae9a74ef166aefb0d#p157474
This addon adds about 540 stars to Leo P, a small irregular galaxy on the outskirts of the Local Group. Thanks to Gurren Lagann for the main stc file.
This addon adds about 540 stars to Leo P, a small irregular galaxy on the outskirts of the Local Group. Thanks to Gurren Lagann for the main stc file.
no more science papers
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Trolligi 112477
- Posts: 268
- Joined: 18.04.2020
- Age: 17
- With us: 4 years 7 months
- Location: London
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Trolligi 112477
- Posts: 268
- Joined: 18.04.2020
- Age: 17
- With us: 4 years 7 months
- Location: London
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Trolligi 112477
- Posts: 268
- Joined: 18.04.2020
- Age: 17
- With us: 4 years 7 months
- Location: London
Addon for Ursa Major III, a newly discovered Milky Way satellite: viewtopic.php?p=162351#p162351
no more science papers
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Trolligi 112477
- Posts: 268
- Joined: 18.04.2020
- Age: 17
- With us: 4 years 7 months
- Location: London
NGC 3109
no more science papers
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Trolligi 112477
- Posts: 268
- Joined: 18.04.2020
- Age: 17
- With us: 4 years 7 months
- Location: London
This addon adds 72 real stars in the Sagittarius Dwarf Irregular Galaxy viewtopic.php?p=163186#p163186
no more science papers