Object of The Week May 31, 2020 UGC 10043 A peculiar edge on

UGC 10043
Serpens
RA
15 48 41
Dec
+21 52 10
Mag 14.4V
————————————————————-
You don’t often see a edge on galaxy with a round core. This makes UGC 10043 unique, most bulge cores in edge on galaxies are elongated or peanut shaped. I know of few EO galaxies with this structure.

Attachment 3898

I did a little research on UGC 10043 and this is what I found. It was thought UGC 10043 was an edge polar ring type galaxy but from the paper Matthews (2004) they suggested that UGC 10043 round core was caused by a late merger event from a gas poor elliptical type galaxy. They also found a super faint dwarf MD 2004 (C)on the North end of UGC 10043 and suggested that it was interacting with it. Also from another later paper Paugirre (2009) they found that the disturbed Galaxy MCG +4-37-35 (B)on the South East end was interacting with UGC 10043 radio telescope showed a gas bridge between them.

Attachment 3899

I have observed UGC 10043 several times over the years and revisited it again last week. At 488X UGC 10043 is a thin LSB glow it reminds me of NGC 891. The round core is easily seen as a ghostly glow. MCG +4-37-35 is seen as a faint patch that gets bigger with averted vision. The super faint dwarf was not seen. Also as a bonus just a field away to The East is the Hickson compact group #77.

Attachment 3900

So if you get a chance give this peculiar edge on a try and as always

“Give it A go and Let us Know”

Found two entries Jimi, a non sight during bad transparency and the notes below. No sketch this time.

27", 293x, NELM 6m5+, Seeing III
central bulge with relative high surface brightness, round arched; no chance for the visibility of the dark lane; extensions much fainter and only visible with averted vision; because of the very faint extensions axis ratio estimated as only 1:4

Uwe I am curious did you see the MCG +4-37-35 galaxy?

I've only observed these galaxies through Jimi's scope, 7 years ago.

UGC 10043: "Fairly faint, large thin edge-on extending nearly 10:1 NNW-SSE, ~1.8'x0.15'. Contains a bright, bulging core with long, very thin extensions (~10" width)."

MCG +04-37-035 (dwarf): "Faint, round, ~0.4' diameter, low surface brightness."
The V magnitude on the MCG (based on averaging the SDSS g and r) is 16.3.

Dug out my notes and noted that I observed this object at 2013 GSSP.

Unfortunately, I wrote scant notes on this observation.

22" (255, 328 and 383x) - faint 3:1 elongated thick glow. Brighter round center. Diffuse edges.

Alvin, you also apparently posted these notes of UGC 10043 using an 18" at TSP, but I don't know the year ...

"Thin streak with a distinct round bulge in the center. Upon seeing this object for the first time, I noticed the bulge first, then the spindle popped in later. About 1.8' long. The bulge is 0.3' in diameter."

Thanks Steve! I didn't remember that. That is why I should organize my notes the way you do. I keep them in a paper spiral bound observing notebook. I have most of my observations on paper and not electronically cataloged.

That was in TSP 2010.

Quote:

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Originally Posted by Steve Gottlieb

Alvin, you also apparently posted these notes of UGC 10043 using an 18" at TSP, but I don't know the year ...

"Thin streak with a distinct round bulge in the center. Upon seeing this object for the first time, I noticed the bulge first, then the spindle popped in later. About 1.8' long. The bulge is 0.3' in diameter."

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I don't looked for the companions Jimi. Don't ask me why. The UGC gives a nice chain with the MCG and PGC 214424.

Second astonishing thing is (I was not aware of this and just saw it at ALADIN) that Hickson 77 is only 9' E. (Ups, you already add the info)

Instead of a quartet, Hickson 77 turns out to be a physical pair A and B and a single foreground galaxy C/D. Based on the SDSS image, D appears to be a blue knot or two at the south edge of C.

Quote:

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Originally Posted by Jimi Lowrey

UGC 10043
Serpens
RA
15 48 41
Dec
+21 52 10
Mag 14.4V
————————————————————-
You don’t often see a edge on galaxy with a round core. This makes UGC 10043 unique, most bulge cores in edge on galaxies are elongated or peanut shaped. I know of few EO galaxies with this structure.

Attachment 3898

I did a little research on UGC 10043 and this is what I found. It was thought UGC 10043 was an edge polar ring type galaxy but from the paper Matthews (2004) they suggested that UGC 10043 round core was caused by a late merger event from a gas poor elliptical type galaxy. They also found a super faint dwarf MD 2004 (C)on the North end of UGC 10043 and suggested that it was interacting with it. Also from another later paper Paugirre (2009) they found that the disturbed Galaxy MCG +4-37-35 (B)on the South East end was interacting with UGC 10043 radio telescope showed a gas bridge between them.

Attachment 3899

I have observed UGC 10043 several times over the years and revisited it again last week. At 488X UGC 10043 is a thin LSB glow it reminds me of NGC 891. The round core is easily seen as a ghostly glow. MCG +4-37-35 is seen as a faint patch that gets bigger with averted vision. The super faint dwarf was not seen. Also as a bonus just a field away to The East is the Hickson compact group #77.

Attachment 3900

So if you get a chance give this peculiar edge on a try and as always

“Give it A go and Let us Know”

---

Jimi,
I thought that a peanut shape core in an edge on implied that the galaxy had a bar (e.r.NGC4565), but the round core could just indicate a normal Sd spiral.

Don I would suggest you read L D Matthews 2004 paper https://arxiv.org/pdf/astro-ph/0403452.pdf

They go into great detail in the paper why they think UGC 10043 is not a Sbc type galaxy.

Thanks, Jimi. Good article. I hadn't known it was classified Sbc.
I guess that classification might be in error.
That's consistent with what I said about the shape of cores in edge-ons that DO have a bar.

Don the paper can explain it way better than I ever could. I also thought it was a good read.

Revisited the UGC yesterday under bad transparency and could not detect the MCG. PGC 214424 4' E of the UGC was visible for seconds each with averted vision as a slightly elongated glow.

Hi All,

I observed HCG 77 last new moon, With UGC 10043 in the field, without remebering that This galaxy was a recent OOTW.
Here are my notes:


x240 Ethos 13m

The galaxy is in the field of HCG 77, main goal, at least at the beginning, of the observation.

The galaxy is difficult; the CS is perceived exactly round, with blurred edges, with a slight gradient.

At first, the two wings are only suspected; then, after adaptation and in distant VI, they appear very clearly, although they remain difficult, like knives without thickness. I note that the perceive them exactly as they are on the SDSS image (which is not exact, because I did not perceive the very slight curvature (which I did not know) at the end of those Ci) .

x390 Ethos 8mm

By observing the bulb, I perceived the dark band, without knowing it, on the surface of the bulb, and of course, nothing beyond, on the wings. E1 * is ER *, E2 * has been suspected, without knowing it.

The three small galaxies, between HCG 77 and UGC 10043, not known, were neither sought nor seen.
More infos at: http://www.deepsky-drawings.com/hcg-...043/dsdlang/fr

Clear skies
Bertrand
http://www.deepsky-drawings.com/

Attachment 3947

Very realistic drawing Bertrand.