Science

discussion

Galaxies in Kepler's Field of View

Started by cappella
Default_user
about 5 years ago

Yesterday I checked up on what I thought was a star. But when I checked it on Sky View it turned out to be a Galaxy with a KID number:

KID 2697299 - http://talk.planethunters.org/objects/APH33611545/discussions/DPH101ou74

Arvintan posted a link to a galaxy he had found:

KID 7818043 - http://talk.planethunters.org/objects/APH32048960/discussions/DPH1011nxe

I believe there is a second one near to it as well.

This made me start collecting Galaxies, and I thought about starting a thread about these Galaxies as well. But with only two of them that wouldn't be much of a discussion.

Enter Kianjin :-)

He provided me with a list of 398 (!) galaxies in Kepler's Field of View.

There are a number of Guest Observer programs studying galaxies. One of them is GO30032. Their goal:

"We propose to monitor about 400 small galaxies in Kepler's field of view for photometric variations at the millimagnitude (mmag) level to detect active galactic nuclei (AGN) at unprecedented low amplitude of variability or brightness. Since ~8% of galaxies are known AGNs (Sarajedini, 2008), we expect to find of order 32 normal AGN in our sample, but an unknown number of low amplitude AGN."

I will post the list very soon, and then I am going to check if the two (three) galaxies mentioned before are on the list.

For those who check stars on Sky View and encounter a galaxy with a KID number, it might be useful to check if that galaxy is on this list.

If it is not, please feel free to submit it to this thread.

Kian: a great many thanks for your help, it's really appreciated! And arvintan, thanks for posting the link and our chats about starting a galaxy thread on Planet Hunters.

Default_user
about 5 years ago

Here's the list of KICs

1435008

2015983

2016447

2142191

2165271

2443235

2694204

2716140

2718252

3111451

3217229

3231957

3238643

3241826

3328109

3430003

3432611 - 2MASX J19124754+3831581 - http://talk.planethunters.org/objects/APHE200079a/discussions/DPH101z322

3448882

3530364

3626263

3627119

3629897

3735860

3743520

3747941

3848665

3939189

4036050

4041337

4143673

4161408

4244552

4246630

4451255

4545774

4546198

4555601

4639978

4640771

4646954

4650922

4730656

4831001

5088640 - 2MASX J19135718+4013005 - http://talk.planethunters.org/objects/APHE3000hfg/discussions/DPH101z4cd

5096107

5172029

5175339

5181967

5183399

5265511

5351480

5438603

5522279

5522717

5523191

5552041

5609075

5612548

5621514

5694866

5780768

5809175

5816837

5879261

5879819

5893799

5961152

5981242

6046217

6046246

6114849

6122868

6123556

6123631

6190771

6271246

6288778

6363832

6368450

6372805

6386181

6386513

6443141

6446189

6591767

6591972

6592846

6595272

6680854

6681212

6681693

6706219

6714622

6751969

6764400

6764734

6774444

6775071

6778411

6784305

6836919

6849154

6860067

6937179

6940039

6946765

7007211

7008802

7017780

7104538

7130605

7131425

7174245

7184788

7213068

7273813

7284602

7295289

7335250

7335951

7336349

7345797

7346618

7416285

7416874

7421540

7500740

7511469

7512591

7533870

7592414

7595037

7595668

7603156

7611830

7658785

7663866

7678447

7691427

7729996

7731102

7748037

7748291

7749381

7749582

7798736

7801953

7808982

7817617

7818210

7818679

7832982

7867503

7868116

7868155

7868295

7868450

7868544

7870579

7885197

7885992

7887423

7889229

7906343

7939354

7953622

7968624

7986325

8005586

8007095

8007342

8023942

8024526

8024978

8025322

8025659

8026783

8027679

8029636

8037789

8059248

8076164

8092207

8093630

8097347

8142493

8149081

8153547

8160525

8161529

8162891

8211291

8213884

8229044

8229062

8230516

8231355

8289556

8296569

8302034

8314320

8345275

8345656

8358411

8360478

8366653

8411010

8411283

8411314

8411319

8424411

8475711

8480662

8487631

8490438

8555389

8556960

8560176

8574851

8609952

8611862

8674719

8686565

8717097

8738297

8757908

8758555

8761416

8803468

8806432

8817664

8826308

8866478

8866508

8866579

8868252

8882917

8884097

8949623

8957091

8962880

8964396

9001746

9002985

9003413

9012568

9018400

9020655

9072242

9072597

9073137

9138722

9139855

9142788

9145675

9204443

9223887

9265038

9267473

9303671

9329179

9333928

9334897

9401837

9408942

9450078

9450169

9509125

9518761

9536439

9570569

9574785

9576109

9596226

9644411

9651052

9766312

9773051

9773418

9813873

9822457

9873535

9875289

9875668

9887589

9934129

9940888

9941981

9948164

9996272

10007135

10016408

10017148

10062936

10121385

10131205

10131692

10132973

10135862

10185802

10196970

10199926

10202418

10202796

10213786

10255737

10263431

10266179

10269373

10317830

10317930

10330028

10383333

10395016

10395510

10402746

10448744

10471592

10472474

10513361

10513991

10537494

10578163

10579087

10579148

10579588

10597927

10599273

10599376

10604562

10645722

10646231

10647621

10649106

10657956

10710374

10723419

10727496

10728097

10775762

10776903

10777144

10793596

10794596

10795187

10796343

10842616

10853802

10858041

10861684

10920916

10960733

10975463

11027803

11028903

11031297

11068072

11068393

11081177

11081424

11082474

11084478

11135407

11137552

11191882

11242578

11356434

11359059

11359454

11404943

11412865

11455033

11463906

11463963

11464929

11466817

11507262

11757229

11768473

11808151

11821088

11919097

11921856

11967275

11969681

11974036

12012943

12018587

12055440

12157434

12165578

12166898

12266136

12301469

12350773

12553112

12556836

12784696

Default_user
about 5 years ago

KID 2697299 - http://talk.planethunters.org/objects/APH33611545/discussions/DPH101ou74

and

KID 7818043 - http://talk.planethunters.org/objects/APH32048960/discussions/DPH1011nxe

are not on the list :-)

Default_user
about 5 years ago

And neither is KID 7886701 , the second galaxy kianjin mentioned in KID 718043's dicussion.

Default_user
about 5 years ago

Finding a galaxy in the Kepler FOV that doesn't have a KID doesn't means it's an unknown galaxy. You would have to do a position search with RA and DEC with SDSS DR9, Simbad, VizieR, and NED. Then if you found no galaxy at those co-ordinates you may have a real discovery.

Default_user
about 5 years ago

Ok, thanks Robert, any help is appreciated here, as this is new territory for me.

The Go program studies 398 galaxies. The ones we found are not on their list. Maybe this thread can be of some help somehow.

Default_user
about 5 years ago

Great work cappella!

Wow, 398 so far in the field. I guess I wasn't wrong in thinking that someone is already looking into this. And what do you know, none of our finds are in it. Btw, I remember searching for KID 7818043 in NED and I think it's already tagged. Not sure though if I did it right as I'm not really a frequent user of SIMBAD and NED. Perhaps anyone else can verify. However, whether the galaxy is already tagged or not shouldn't be a problem, getting new data points for the GO teams could be a main goal of this collection. And it looks like we already have two new ones for them.

Btw, thanks to Batman for that list...I mean Kian.

Default_user
about 5 years ago

@arvintan

I am not a user of SIMBAD, NED or one of the other surveys Robert mentioned. Maybe someone can help me make use of them. That would be very handy down the line :-).

For this discussion to have a scientific purpose I use The GO program and their list of 398 galaxies. Whenever we find a galaxy and it's not on that list we can post it here.

@troyw

I hope kianjin reads this, and he can answer your questions, as I am not an expert in these matters.

The lightcurve of the one I found looked like a star with small eclipses in one quarter, but it looked contaminated so I checked it on Sky View. I don't know why there are eclipse-like features in one quarter. I suspect it is just noise from the foreground stars, but I am completely guessing here.

Default_user
about 5 years ago

An added point that could be helpful: I think we should look out for "stars" that are categorically quiet on almost all quarters and have an unknown status as to being giants or dwarfs. Both KIDs that were presented share the same characteristics.

Default_user
about 5 years ago

It would be helpful to post the Skyview images of the unlisted objects to see if they look like galaxies. Another check that should be done is a tight coordinate search using NVO datascope. My point is that a very through search needs to be done to be sure that the galaxy is not cataloged somewhere. KID 2697299 has an SDSS and 2MASS designation from a SDSS DR 9 Quick Look search, so you can forget about that one. KID 7818043 and KID 7886701 both have 2MASS designations from a VisieR position search so both of them are known. In general I would strongly suspect that your chances of discovering an unknown galaxy in the Kepler FOV would be very remote.

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