HD 97048

{{Short description|Herbig Ae/Be star in the constellation Chamaleon}}

{{Starbox observe

| epoch = J2000

| constell = Chamaeleon

| ra = {{RA|11|08|03.3106}}

| dec = {{DEC|−77|39|17.4912}}

| appmag_v = 8.38 - 8.48

}}

{{Starbox character

| type = Herbig Ae/Be

| class = A0Vep

| b-v =

| u-b =

| variable = INA

}}

{{Starbox astrometry

| radial_v = 34.00±2.5

| prop_mo_ra = {{val|−22.437|0.061}}

| prop_mo_dec = {{val|1.305|0.059}}

| parallax = 5.4105

| p_error = 0.0388

| parallax_footnote =

| absmag_v = +2.47

}}

{{Starbox detail

| mass = 2.5

| radius = 1.7

| luminosity = 33

| temperature = 10,500

| gravity = 4.30

| metal =

| rotation =

| age_myr = 3

}}

{{Starbox catalog

| names = {{odlist | CD=−76 488 | HIP=54413 | SAO=256802 }}

}}

{{Starbox reference

| Simbad = HD+97048

}}

HD 97048 or CU Chamaeleontis is a Herbig Ae/Be star {{val|603|ul=ly}} away in the constellation Chamaeleon. It is a variable star embedded in a dust cloud containing a stellar nursery, and is itself surrounded by a dust disk.

HD 97048 is a young star still contracting towards the main sequence. Its brightness varies between magnitudes 8.38 and 8.48 and it is classified as an Orion variable. It was given the variable star designation CU Chamaeleontis in 1981. Its spectrum is also variable. The spectral class is usually given as A0 or B9, sometimes with a giant luminosity class, sometimes main sequence. The spectrum shows strong variable emission lines indicative of a shell surrounding the star.

HD 97048 is a member of the Chamaeleon T1 stellar association and is still embedded within the dark molecular cloud that it is forming from. It illuminates a small reflection nebula against the dark cloud.

Planetary system

This star has a substantial dust disk having a central cavity with a 40−46 AU radius The disk has a carbon monoxide gas velocity kink and intensity gap at 130 AUs, which is suspected to be caused by a superjovian planet. In 2019, HCO⁺ ion and Hydrogen cyanide emission was detected from the disk, suggesting a large amount of gas is orbiting beyond 200 AU radius.

File:HD 97048 disk.png

In the system a kink in the velocity of carbon monoxide gas (CO 3–2) as well as a gap in the dust emission of the disk are seen as evidence for a jovian protoplanet. The protoplanet is located at 130 au from the star and has a mass of about 2.5 Jupiter masses. It is one of the lowest mass protoplanets discovered as of 2023.{{Cite journal |last1=Pinte |first1=C. |last2=van der Plas |first2=G. |last3=Ménard |first3=F. |last4=Price |first4=D. J. |last5=Christiaens |first5=V. |last6=Hill |first6=T. |last7=Mentiplay |first7=D. |last8=Ginski |first8=C. |last9=Choquet |first9=E. |last10=Boehler |first10=Y. |last11=Duchêne |first11=G. |last12=Perez |first12=S. |last13=Casassus |first13=S. |date=2019-08-01 |title=Kinematic detection of a planet carving a gap in a protoplanetary disk |url=https://ui.adsabs.harvard.edu/abs/2019NatAs...3.1109P |journal=Nature Astronomy |volume=3 |issue=12 |pages=1109–1114 |doi=10.1038/s41550-019-0852-6 |arxiv=1907.02538 |bibcode=2019NatAs...3.1109P |s2cid=195820690 |issn=2397-3366}}

{{OrbitboxPlanet begin

| name = HD 97048

| table_ref =

| period_unit =

}}

{{OrbitboxPlanet disk

| disk = protoplanetary disk

| periapsis = 40

| apoapsis = 850

| inclination = 40

}}

{{Orbitbox planet|exoplanet=b|mass={{val|2.5|0.5}}|semimajor=130|inclination=40}}{{Orbitbox end}}

References

{{reflist|refs=

{{cite journal |arxiv=1907.08060 |doi=10.1051/0004-6361/201834388 |title=First detections of H13CO+ and HC15N in the disk around HD 97048 |year=2019 |last1=Booth |first1=Alice S. |last2=Walsh |first2=Catherine |last3=Ilee |first3=John D. |journal=Astronomy & Astrophysics |volume=629 |pages=A75 |s2cid=197544948 }}

{{cite journal |arxiv=1907.02538 |doi=10.1038/s41550-019-0852-6 |title=Kinematic detection of a planet carving a gap in a protoplanetary disk |year=2019 |last1=Pinte |first1=C. |last2=Van Der Plas |first2=G. |last3=Ménard |first3=F. |last4=Price |first4=D. J. |last5=Christiaens |first5=V. |last6=Hill |first6=T. |last7=Mentiplay |first7=D. |last8=Ginski |first8=C. |last9=Choquet |first9=E. |last10=Boehler |first10=Y. |last11=Duchêne |first11=G. |last12=Perez |first12=S. |last13=Casassus |first13=S. |journal=Nature Astronomy |volume=3 |issue=12 |pages=1109–1114 |bibcode=2019NatAs...3.1109P |s2cid=195820690 }}

{{cite journal|bibcode=2015MNRAS.453..976F|title=A spectroscopic survey of Herbig Ae/Be stars with X-shooter - I. Stellar parameters and accretion rates|journal=Monthly Notices of the Royal Astronomical Society|volume=453|issue=1|pages=976|last1=Fairlamb|first1=J. R.|last2=Oudmaijer|first2=R. D.|last3=Mendigutía|first3=I.|last4=Ilee|first4=J. D.|last5=Van Den Ancker|first5=M. E.|year=2015|doi=10.1093/mnras/stv1576|doi-access=free |arxiv=1507.05967|s2cid=55938596}}

{{cite journal|bibcode=2014yCat....1.2023S|title=VizieR Online Data Catalog: Catalogue of Stellar Spectral Classifications (Skiff, 2009-2014)|journal=VizieR On-line Data Catalog: B/Mk. Originally Published in: Lowell Observatory (October 2014)|volume=1|last1=Skiff|first1=B. A.|year=2014}}

{{Cite journal | doi=10.1134/S1063773706110065 | bibcode=2006AstL...32..759G| title=Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system| journal=Astronomy Letters| volume=32| issue=11| pages=759–771| year=2006| last1=Gontcharov| first1=G. A.|arxiv = 1606.08053 | s2cid=119231169}}

{{cite journal|bibcode=1981IBVS.1921....1K |title=65th Name-List of Variable Stars |journal=Information Bulletin on Variable Stars |volume=1921 |pages=1 |last1=Kholopov |first1=P. N. |last2=Samus' |first2=N. N. |last3=Kukarkina |first3=N. P. |last4=Medvedeva |first4=G. I. |last5=Perova |first5=N. B. |year=1981 }}

{{cite journal|doi=10.1086/112694|title=Observations of young stars in the association Chamaeleon T1|journal=The Astronomical Journal|volume=85|pages=444|year=1980|last1=Rydgren|first1=A. E.|bibcode=1980AJ.....85..444R|doi-access=}}

{{cite journal

| title=Cavity and other radial substructures in the disk around HD 97048

| last1=van der Plas | first1=G. | last2=Wright | first2=C. M.

| last3=Ménard | first3=F. | last4=Casassus | first4=S.

| last5=Canovas | first5=H. | last6=Pinte | first6=C.

| last7=Maddison | first7=S. T. | last8=Maaskant | first8=K.

| last9=Avenhaus | first9=H. | last10=Cieza | first10=L.

| last11=Perez | first11=S. | last12=Ubach | first12=C.

| journal=Astronomy & Astrophysics | display-authors=1

| volume=597 | id=A32 | pages=19 | date=January 2017 | doi=10.1051/0004-6361/201629523 | bibcode=2017A&A...597A..32V |arxiv = 1609.02488 | s2cid=54495153 }}

{{cite journal|bibcode=2009yCat....102025S|title=VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)|journal=VizieR On-line Data Catalog: B/GCVS. Originally Published in: 2009yCat....102025S|volume=1|display-authors=etal|last1=Samus|first1=N. N.|last2=Durlevich|first2=O. V.|year=2009}}

{{cite journal|bibcode=1977PASP...89..347I|title=Spectral changes in the pre-main-sequence star HD 97048|journal=Publications of the Astronomical Society of the Pacific|volume=89|pages=347|last1=Irvine|first1=N. J.|last2=Houk|first2=N.|year=1977|doi=10.1086/130131|doi-access=free}}

{{cite journal

| title=XHIP: An extended hipparcos compilation

| last1=Anderson | first1=E. | last2=Francis | first2=Ch.

| journal=Astronomy Letters

| volume=38 | issue=5 | pages=331 | year=2012

| bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015

| arxiv=1108.4971 | s2cid=119257644 }}

}}

Category:Chamaeleon

Category:Circumstellar disks

Category:Herbig Ae/Be stars

Category:Hypothetical planetary systems